Author Interviews, General Medicine, Heart Disease, JAMA, Kidney Disease / 30.11.2014

Giovanni Landoni, M.D. Head of Research,Department of Anesthesiology and Intensive Care Associate Professor at Università Vita-Salute San Raffaele, MilanMedicalResearch.com Interview with: Giovanni Landoni, M.D. Head of Research,Department of Anesthesiology and Intensive Care Associate Professor at Università Vita-Salute San Raffaele, Milan Medical Research: What is the background for this study? Dr. Landoni: The prevention and treatment of acute kidney injury after cardiac surgery is a major therapeutic goal, but no effective agents have yet been identified. Meta-analyses suggested that fenoldopam might be effective. Medical Research: What are the main findings? Dr. Landoni: We found that in cardiac surgery patients with early acute kidney injury (defined as a ≥50% increase of serum creatinine from baseline or oliguria for ≥6 hours), fenoldopam had no impact on the need for renal replacement therapy or 30-day mortality, while increasing the rate of hypotension. (more…)
Heart Disease / 28.11.2014

Concetta Crivera MPH, Pharm.D Associate Director, Outcomes Research Ortho-McNeil Janssen Scientific Affairs, LLCMedicalResearch.com Interview with: Concetta Crivera MPH, Pharm.D Associate Director, Outcomes Research Ortho-McNeil Janssen Scientific Affairs, LLC   Medical Research: What is the background for this study? What are the main findings? Response: Findings from the study presented at the American Heart Association (AHA) 2014 Scientific Sessions showed once-daily XARELTO® (rivaroxaban) is associated with significantly fewer hospitalization days and outpatient visits compared to warfarin in patients with non-valvular atrial fibrillation (NVAF). Corresponding hospitalization and outpatient healthcare costs were also significantly lower for XARELTO® compared to warfarin in NVAF patients, according to longitudinal, real-world findings from this observational study. (more…)
Author Interviews, Heart Disease / 28.11.2014

Dr. Roberta Williams MD Professor and Chair, Department of Pediatrics, Keck School of Medicine VP for Pediatrics and Academic Affairs, Childrens Hospital Los AngelesMedicalResearch.com Interview with: Dr. Roberta Williams MD Professor of Pediatrics Keck School of Medicine at the University of Southern California MedicalResearch.com: What is the background for this study? Dr. Williams: Although a large number of children with chronic disease are surviving into adulthood, the extent and type of health resource needs remains a mystery. Patients with congenital heart disease (CHD) require lifelong care, so it is important to understand present resource utilization both as a foundation for planning services and as a reference point to assess the changes that occur with presumed improved access to care due to health care reform. (more…)
Author Interviews, Heart Disease / 28.11.2014

MedicalResearch.com Interview with: Siobhan Brown, Ph.D. Biostatistician, ROC Clinical Trials Center University of Washington Medical Research: What is the background for this study? What are the main findings? Dr. Brown: There are several observational studies suggesting that patients with out-of-hospital cardiac arrest may be more likely to survive to hospital discharge when emergency medical service provides do not pause for ventilations while performing CPR (i.e., give continuous compressions); however, the American Heart Association recommends that rescuers pause after each 30 compression to give two ventilations (interrupted compressions). We designed and are conducting a randomized clinical trial comparing the two approaches to see which results in better survival. The trial is still ongoing, so watch for results in late 2015! (more…)
Author Interviews, Heart Disease, JAMA / 26.11.2014

Dr. Mary T. Hawn Center for Surgical, Medical Acute Care Research, and Transitions, Birmingham Veterans Affairs Medical Center University of Alabama at Birmingham, BirminghamMedicalResearch.com Interview with Dr. Mary T.  Hawn MD Center for Surgical, Medical Acute Care Research, and Transitions, Birmingham Veterans Affairs Medical Center University of Alabama at Birmingham, Birmingham Medical Research: What are the main findings? Dr. Hawn: The main findings of the study are that the recommendations made in the guidelines published by the American College of Cardiology / American Heart Association in 2007 were effective at reducing postoperative major adverse cardiac events following noncardiac surgery in patients with a cardiac stent.1  These guidelines recommended the delay of noncardiac surgeries in patients with a drug-eluting stent for 365 days if the surgery was not emergent or the delay of surgery for 4 to 6 weeks among patients with a bare metal stent.  In addition to a 26% reduction in postoperative major adverse cardiac events, we also found an increase in the time between drug-eluting stent placement and non-cardiac surgery consistent with the guideline recommendations. (more…)
Author Interviews, Exercise - Fitness, Heart Disease / 26.11.2014

Carl "Chip" Lavie MD, FACC Medical Director, Cardiac Rehabilitation and Prevention Director, Exercise Laboratories John Ochsner Heart and Vascular Institute Professor of Medicine Ochsner Clinical School-UQ School of Medicine Editor-in-Chief, Progress in Cardiovascular DiseasesMedicalResearch.com Interview with: Carl "Chip" Lavie MD, FACC Medical  Director, Cardiac  Rehabilitation and Prevention Director, Exercise Laboratories John Ochsner Heart and Vascular Institute Professor of Medicine Ochsner Clinical  School-UQ School of Medicine Editor-in-Chief, Progress in Cardiovascular Diseases Medical Research: What are the key points of your editorial? Dr. Lavie: 1) The importance of higher fitness to predict a lower rate of developing Heart Failure; 2) improvements in fitness over  time  predict a lower rate of developing  Heart Failure, and 3) Once Heart Failure develops, higher fitness predicts a more favorable prognosis. (more…)
Author Interviews, Heart Disease, JAMA / 26.11.2014

MedicalResearch.com Interview with: Matthew D. Ritchey, DPT Division for Heart Disease and Stroke Prevention US Centers for Disease Control and Prevention, Atlanta, Georgia Medical Research: What is the background for this study? What are the main findings? Dr. Ritchey: This study analyzes the contribution of heart disease subtypes – such as coronary heart disease, heart failure, hypertensive heart disease and arrhythmia – to overall trends in heart disease death rates between 2000 and 2010. Our research revealed that overall heart disease-related deaths declined during that time frame at a rate of almost four percent annually. Most of this decline appears to be driven by decreases in coronary heart disease mortality, which includes deaths due to heart attacks. However, not all heart disease subtypes saw similar decreases. Arrhythmia and hypertensive heart disease death rates increased annually during this period. In addition, there were differences depending on age group, subtype, gender and race/ethnicity. For example, hypertensive heart disease rates were much higher (more than double) among non-Hispanic blacks in 2010 than among non-Hispanic whites. That could be due to factors including uncontrolled blood pressure and obesity among younger adults. Also, the increase in arrhythmia mortality was highest among non-Hispanic whites, women and adults age 75 and over. That increase might be linked to the growing aging population, the result of individuals living longer with heart failure, increases in chronic kidney disease and hypertensive heart disease prevalence and changes in how the condition is reported. To determine these findings, we examined de-identified death certificates of U.S. residents ages 35 and up who died from 2000 to 2010. The data was pulled from the CDC WONDER database, which contains death certificate information from every U.S. state and the District of Columbia. (more…)
Author Interviews, Heart Disease / 25.11.2014

MedicalResearch.com Interview with: Dr. Eloisa Colin-Ramirez, BSc, PhD and Justin A. Ezekowitz, MBBCh MSc Associate Professor, University of Alberta Co-Director, Canadian VIGOUR Centre Director, Heart Function Clinic Cardiologist, Mazankowski Alberta Heart Institute Medical Research: What is the background for this study? What are the main findings? Response: The SODIUM-HF study is a randomized control trial on sodium restriction in patients with chronic heart failure (HF). Sodium restriction has been broadly recommended as part of the self-care strategies in heart failure yet is based on little high-quality evidence. This study reports the results of the pilot SODIUM-HF trial in 38 patients with chronic HF. Nineteen patients were prescribed a low sodium containing diet (1500 mg/day) and 19 a moderate sodium containing diet (2300 mg/day). Both interventions were based on a structured and individualized meal plan to achieve the targeted sodium intake, and all patients were followed for 6 months with monthly phone call to reinforce adherence to the diet. We found a meaningful reduction in sodium intake to less than 1500 mg/day at 6 months in both groups. Additionally, we observed that patients that achieved a sodium intake less than 1500 mg/day at 6 months of follow-up had reduced BNP levels, a biomarker of volume overload and surrogate prognostic marker in heart failure, and increased overall and clinical scores of the Kansas City Cardiomyopathy Questionnaire, compared to those with a sodium intake greater than 1500 mg/day. (more…)
Heart Disease / 25.11.2014

Dean J. Kereiakes, MD FACC, FSCAI The Lindner Research Center The Christ Hospital Health Network Cincinnati, Ohio 45219MedicalResearch.com Interview with: Dean J. Kereiakes, MD FACC, FSCAI The Lindner Research Center The Christ Hospital Health Network Cincinnati, Ohio 45219 Medical Research: What is the background for this study? Dr. Kereiakes: Bare metal stents (BMS) are a commonly used alternative to drug eluting stents (DES) particularly for patients presenting with acute coronary syndromes or in whom dual antiplatelet therapy (DAPT) has perceived increased bleeding risks. We aimed to determine whether the risks of stent thrombosis and major adverse clinical cardiovascular and cerebrovascular (MACCE; composite of death, MI or stroke) events differ for BMS versus DES and whether the optimal duration of dual antiplatelet therapy differs for BMS or DES. To answer these objectives we performed a propensity matched BMS to DES 0-33 month comparison as well as an analysis of treatment effect among BMS treated patients randomly assigned to 12 versus 30 months of DAPT. (more…)
Author Interviews, Heart Disease, Infections, Lancet / 24.11.2014

MedicalResearch.com Interview with: Dr. Martin Thornhill PhD Department of Cardiology, Taunton and Somerset NHS Trust Taunton, Somerset, UK Medical Research: What is the background for this study? What are the main findings? Dr. Thornhill: In 2008 NICE introduced controversial new guidance recommending that antibiotic prophylaxis to prevent infective endocarditis should no longer be used. It was a rational decision, given the evidence for the effectiveness of antibiotic prophylaxis and potential concerns about costs, the development of antibiotic resistance and possible side effects from antibiotics, but it went against other guidelines from around the world that existed at the time. The main findings are that in England:
  1. There has been a large and significant decline in the use of antibiotic prophylaxis.
  2. There has been a significant increase in the number of cases of infective endocarditis, above the baseline trend, using hospital coding data, corrected for changes in the size of the English population.
(more…)
Heart Disease, JAMA / 24.11.2014

Giulio Conte MD Heart Rhythm Management Centre UZ-VUB Brussel, BelgiumMedicalResearch.com with: Giulio Conte MD Heart Rhythm Management Centre UZ-VUB Brussel, Belgium Medical Research: What is the background for this study? What are the main findings? Dr. Conte: The evolution of Brugada syndrome from pediatric to adult age has not been previously evaluated. It has been shown that the electrocardiographic phenotype of Brugada syndrome do not manifest during childhood in the large majority of cases. Drug challenge with ajmaline is recommended to unmask the diagnostic electrocardiogram in patients with family history of Brugada syndrome and normal electrocardiograms. However, the ideal age to perform such screening has not been established yet. With this study we aimed to investigate the clinical value of repeating ajmaline challenge after puberty in pediatric family members with an initial negative drug test. Repeat ajmaline challenge after puberty unmasked Brugada syndrome in 23% of family members with a previously negative drug test. Of the newly positive patients, 30% developed symptoms, 10% ventricular fibrillation and 10% spontaneous Brugada type 1 electrocardiogram. (more…)
Emergency Care, Heart Disease / 23.11.2014

Michael J. Ward, MD, MBA K12 Scholar Assistant Professor Vanderbilt University Department of Emergency Medicine Nashville, TN 37232MedicalResearch.com Interview with: Michael J. Ward, MD, MBA K12 Scholar Assistant Professor Vanderbilt University Department of Emergency Medicine Nashville, TN 37232 Medical Research: What is the background for this study? What are the main findings? Dr. Ward: The number of Americans living with cardiovascular disease is only expected to increase in the coming years.  However, we do not know the national effects of increased medication use and preventive efforts to stop the most serious form of a heart attack, called an ST-elevation myocardial infarction (STEMI). In particular, there are no estimates of how often this serious form of a heart attack shows up in the emergency department. Between 2006 and 2011 we found an average of 258,000 STEMIs annually in the U.S. or 8.7 per 10,000 U.S. adults per year. Interestingly, the number of STEMIs has decreased by more than 70,000 per year over this time, a 24% reduction. We found similar annual decreases across every age group and geographic region in the U.S. The decreases were most pronounced among those 85 years and older and in the Midwest. (more…)
Flu - Influenza, Heart Disease / 21.11.2014

MedicalResearch.com Interview with: Harleen Sandhu, MD MPH Senior Researcher University of Texas Health Science Center at Houston Medical Research: What is the background for this study? What are the main findings? Dr. Sandhu: Previous studies have shown a correlation between seasonal variations and occurrence of acute aortic dissection, however, reasons for such associations are unknown. Seasonal flu activity has been associated with the occurrence of cardiovascular diseases such as acute myocardial infarction in the past. This led us to verify this seasonal correlation in our experience with acute aortic dissection patients and to further investigate if its incidence was associated with flu activity. Our results confirmed the seasonal variation in acute aortic dissection as well as demonstrated a positive correlation with seasonal flu activity. (more…)
Heart Disease / 21.11.2014

Mark Rabbat, MD Assistant Professor of Medicine and Radiology Division of Cardiology at Loyola University Medical CenterMedicalresearch.com Interview with: Mark Rabbat, MD Assistant Professor of Medicine and Radiology Division of Cardiology at Loyola University Medical Center MedicalResearch.com: What are the main findings of this study? Dr. Rabbat : Atrial fibrillation (AF) is the most common sustained arrhythmia in clinical practice and is responsible for significant morbidity and mortality. Epidemiologic data suggest that obesity as measured by one’s BMI is a risk factor for Atrial fibrillation. But there is more to the story. What may be even more important than overall BMI is how much fat you have around the heart. There are many individuals who, as measured by their BMI, are not considered obese, but they have high volumes of fat around their heart, which may have been a major cause for their atrial fibrillation. Therefore, simple measures such as BMI may fail to completely inform us of a patient’s true CV risk. In a previous study we found that epicardial adipose tissue (EAT), or the fat around the heart, has been associated with the presence and severity of AF independent of known risk factors and body mass index (BMI). The inflammatory mediators released from the fat are metabolically active, and may promote fibrosis in adjacent heart muscle. Fibrosis of the left atrium appears to be a hallmark feature of atrial fibrillation and higher amounts of fibrosis are linked to recurrence of atrial fibrillation. New innovations in cardiac magnetic resonance imaging (CMR) allow LA fibrosis and EAT to be precisely quantified. Our current study is the first of its kind to demonstrate the association of EAT volume and extent of LA fibrosis in human AF independent of LA size, BMI, and other AF risk factors. (more…)
Author Interviews, General Medicine, Heart Disease, Lipids / 21.11.2014

Thomas M. Maddox MD MSc Cardiology, VA Eastern Colorado Health Care System Associate Director, VA CART ProgramMedicalResearch.com Interview with: Thomas M. Maddox MD MSc Cardiology, VA Eastern Colorado Health Care System Associate Director, VA CART Program Associate Professor, Department of Medicine University of Colorado School of Medicine Medical Research: What is the background for this study? What are the main findings? Dr. Maddox: With the release of the updated cholesterol guidelines last year and their significant changes in recommendations, we wanted to see what the potential impact would be on U.S. cardiovascular practices.  Specifically, we were interested in present cholesterol treatment and testing patterns, and how they would potentially need to change under the new guidelines. We used the PINNACLE registry to conduct our investigation.  Under the sponsorship of the American College of Cardiology, the registry collects EMR data from 111 cardiovascular practices around the U.S.  We analyzed cholesterol treatment and testing patterns in approximately 1.2 million patients.  We found that most patients qualified for cholesterol treatment with statins, but 32.4% weren't currently prescribed them.  We also found that 22.6% of patients were being treated with non-statin lipid-lowering therapies which, under the new guidelines, aren't currently recommended for cholesterol treatment.  Finally, we found that 20.8% of patients underwent repeated LDL-C testing, which may not be necessary under the new guidelines. (more…)
Emergency Care, Heart Disease / 21.11.2014

Bentley Bobrow, MD, Medical Director Bureau of Emergency Medicine Services and Trauma System Arizona Department of Health Services, Phoenix Professor, University of ArizoneaMedicalResearch.com Interview with: Bentley Bobrow, MD, Medical Director Bureau of Emergency Medicine Services and Trauma System Arizona Department of Health Services, Phoenix Professor, University of Arizona Medical Research: What is the background for this study? What are the main findings? Dr. Bobrow: Out-of-Hospital Cardiac Arrest is a leading cause of death worldwide. There are nearly half a million EMS-assessed Out-of-Hospital Cardiac Arrest s in the United States annually. Bystander CPR (B-CPR) before arrival of EMS can double or even triple survival from OHCA. Yet it occurs in only 1/3 of cases. Telephone CPR - the provision of B-CPR with a 9-1-1 telecommunicator's instructions - is independently associated with increased rates of Bystander CPR and patient survival and requires almost no capital investment. For this reason, we believe Telephone CPR may be THE most effective and efficient way to move the needle on OHCA survival. In order to achieve this potential, however, EMS systems must adopt the latest guideline recommendations for T-CPR and continuously measure system performance. Very few systems do this. The aim of our project was to do just this at multiple 9-1-1 centers in Arizona. We implemented the guidelines and measured the impact on process metrics and patient outcomes. Our findings confirmed what we expected: a significant increase in the proportion of cases where T-CPR was performed, a significant reduction in time from call-receipt to first bystander chest compression, and, most importantly, significant increases in patient survival and survival with positive neurologic outcome. (more…)
Author Interviews, CDC, Heart Disease / 19.11.2014

MedicalResearch.com Interview with: Dr. Quanhe Yang PhD CDC’s Division for Heart Disease and Stroke Prevention What is the background for this study? What are the main findings? Dr. Yang: Our study reveals that an individual’s predicted risk of developing cardiovascular disease (CVD), coronary heart disease (CHD) and stroke over the next decade varies significantly from state-to-state, as well as by demographic factors including age, gender, race-ethnicity and household income. Among the key findings: the 10-year risk is higher in the Southeast and lower in northwestern states – and higher among men than women. For men, the 10-year risk of developing CVD was 14.6 percent for the nation as a whole, ranging from a low of 13.2 percent in Utah to a high of 16.2 percent in Louisiana. CHD risk among men ranged from 9.5 percent in Utah to 11.7 percent in Louisiana, while stroke risk was 2.1 percent in Utah and 2.6 percent in Louisiana. Among women, CVD risk was 7.5 percent, ranging from 6.3 percent in Minnesota to as high as 8.7 percent in Mississippi. CHD risk for women ranged from 3.8 percent in Minnesota to 5.3 percent in Mississippi, while stroke risk was as low as 1.5 percent in Minnesota and as high as 2.1 percent in Mississippi. Nationally, we found the risk increased significantly with age and was highest among non-Hispanic blacks, those with less than a high school education and those with household incomes below $35,000 . As part of this study, CDC researchers analyzed data from the National Health and Nutrition Examination Survey (NHANES) between 2005 and 2010, as well as the 2009 Behavioral Risk Factor Surveillance System, the world’s largest ongoing telephone health surveillance system. The state-based, random-digit-dialed phone survey included information from almost 300,000 U.S. residents between the ages of 30 and 74. (more…)
Author Interviews, BMJ, Heart Disease, Occupational Health / 19.11.2014

MedicalResearch.com Interview with: Vasileia Varvarigou MD, Visiting Scientist at Harvard School of Public Health and Senior Medical Resident, St Elizabeth’s Medical Center, Tufts Medical School and Stefanos N Kales MD, MPH, Associate Professor, Harvard School of Public Health, Division Chief of Occupational Medicine, Cambridge Health Alliance/ Harvard Medical School Medical Research: What is the background for this study? Response: Previous epidemiologic studies of firefighters have documented markedly increased risks of acute death from heart disease during strenuous activities such as fire suppression as compared to non-emergency duties. We hypothesized that certain law enforcement tasks could serve as an occupational trigger in susceptible police officers, leading to an increased frequency of sudden cardiac death during stressful duties. Our main objective therefore, was to assess the association between risk of sudden cardiac death and stressful law enforcement duties compared with routine/non-emergency duties. (more…)
Author Interviews, Heart Disease / 19.11.2014

MedicalResearch.com Interview with: Thanh Huyen T Vu MD, PhD Research Assistant Professor Preventive Medicine-Epidemiology Northwestern University Feinberg School of Medicine Medical Research: What is the background for this study? Response: Ideal levels of all major cardiovascular disease (CVD) risk factors (RF), i.e., low risk (LR), in younger age are associated with lower subsequent CVD morbidity and mortality in older age. However, data are limited on the long-term relationships of LR profile in younger age with functional disability in older age. (more…)
Author Interviews, Heart Disease, JAMA / 19.11.2014

Dr. Lars H. Lund Department of Medicine, Karolinska Institutet Department of Cardiology, Karolinska University Hospital Stockholm, SwedenMedicalResearch.com Interview with: Dr. Lars H. Lund Department of Medicine, Karolinska Institutet Department of Cardiology, Karolinska University Hospital Stockholm, Sweden Medical Research: What is the background for this study? Dr. Lund: Heart Failure and Preserved Ejection Fraction is common and associated with poor prognosis and there is no therapy. Beta-blockers reduce mortality in Heart Failure and Preserved Ejection Fraction and we hypothesized that they may be associated with reduced mortality also in Heart Failure and Preserved Ejection Fraction. (more…)
Author Interviews, Cost of Health Care, Heart Disease, UCLA / 18.11.2014

Boback Ziaeian MD Cardiology Fellow, UCLA Division of Cardiology PhD Candidate, UCLA Fielding School of Public HealthMedicalResearch.com Interview with: Boback Ziaeian MD Cardiology Fellow, UCLA Division of Cardiology PhD Candidate, UCLA Fielding School of Public Health Medical Research: What is the background for this study? What are the main findings? Dr. Ziaeian: Heart failure is projected to increase dramatically over the coming decade due to an aging population improved medical therapies that prolong heart failure survival. Spending for heart failure is projected to increase from $20.9 billion in 2012 to $53.1 billion in 2030.  Despite the magnitude of the impact of heart failure on the US population and economy, our understanding of the factors associated with the highest cost heart failure hospitalizations is limited. Our study provides a descriptive analysis of how certain patient and hospital factors are associated with increased medical costs nationally. The top 20% of heart failure hospitalizations average $28,500 per hospitalization compared to $3,000 for the lowest 20%. Overall, patients with more medical conditions (such as obesity, lung disease, and peripheral vascular disease) have much higher costs associated with hospital care. As expected, sicker patients receiving more invasive procedures such mechanical ventilation or blood transfusions incurred higher costs. Certain hospital characteristics were also associated with higher costs. Hospitals in urban centers were higher cost compared to more rural hospitals. Hospitals in the Northeast and West Coast of the US were higher in cost compared to the Midwest and South. The reasons for this disparity in medical costs requires further research to better understand. (more…)
Author Interviews, Heart Disease / 18.11.2014

Prof Simon Stewart PhD Mary MacKillop Institute for Health Research, Australian Catholic University, Baker IDI Heart and Diabetes Institute, Melbourne, VIC, AustraliaMedicalResearch.com Interview with: Prof Simon Stewart PhD Mary MacKillop Institute for Health Research, Australian Catholic University, Baker IDI Heart and Diabetes Institute, Melbourne, VIC, Australia Medical Research: What is the background for this study? What are the main findings? Prof. Stewart: Atrial fibrillation (AF) is the most common irregular heart beat and a major cause of deadly and disabling stroke and chronic heart failure. Atrial fibrillation has become a major public health issue that is putting increasing pressure on health care systems worldwide. In an attempt to reduce re-hospitalisations and death due to Atrial fibrillation, we designed the randomised controlled trial the Standard versus Atrial Fibrillation-spEcific managemenT strategY (SAFETY); a home-based, nurse-led, AF-specific management programme delivered to patients who have been hospitalised with Atrial fibrillation and involved individualised AF management. Half of participants (n=168) were given this intervention and the other half (n=167) underwent standard post-hospital management. All participants were followed-up over 24 months with specific clinic visits scheduled at 12 months and 24 months. We found that patients in the intervention group had proportionately more days alive and out of hospital compared to patients who received standard management (reflecting a combination of less hospital stay and prolonged survival). Further, when intervention patients did go to hospital, the length-of-stay of their admission was shorter than for patients under standard management. (more…)
Cognitive Issues, Heart Disease / 17.11.2014

Dr. T. Jared Bunch, M.D Medical Director for Heart Rhythm Services Intermountain Healthcare network.MedicalResearch.com Interview with: Dr. T. Jared Bunch, M.D Medical Director for Heart Rhythm Services Intermountain Healthcare network. Medical Research: What is the background for this study? What are the main findings? Dr. Bunch: Approximately 5 years ago we found that atrial fibrillation was associated with all forms of dementia, including Alzheimer's disease.  At that time we did not know the mechanisms behind the association.  One hypothesis that we had was brain injury in patients with atrial fibrillation is in a spectrum, large injuries result in strokes and repetitive small injuries result in dementia.  In this regard, we anticipated that anticoagulation effectiveness and use may impact dementia risk.  Early this year we published in HeartRhythm Journal that atrial fibrillation patients with no history of dementia that have used warfarin, but had high percent times outside of the therapeutic range were much more likely to develop dementia.  We gained some insight from this trial in that we saw much higher risks of the patients were either over or under anticoagulated. Amongst our atrial fibrillation patients using warfarin nearly one third are also taking aspirin, typically due to the presence of coronary artery disease or a prior myocardial infarction. We hypothesized since these patients were using two agents that increase risk of bleed that over anticoagulation with warfarin may be an even great risk for dementia.  This is was we found.  The patients over anticoagulated greater than 30 percent of the time were nearly 2 and a half times more likely to develop dementia compared to those that were over anticoagulated less that 10 percent to the time. (more…)
Author Interviews, Heart Disease, Lancet / 17.11.2014

Prof Gavin D. Perkins MD Clinical Professor in Critical Care Medicine Warwick Clinical Trials Unit Co-Director of Research; Warwick Medical School and Heart of England NHS Foundation TrustMedicalResearch.com Interview with: Prof Gavin D. Perkins MD Clinical Professor in Critical Care Medicine Warwick Clinical Trials Unit Co-Director of Research; Warwick Medical School and Heart of England NHS Foundation Trust Medical Research: What is the background for this study? Prof. Perkins: Each year around 30,000 people in the United Kingdom suffer out of hospital cardiac arrests and less than one in twelve of those returns home alive. Early high quality Cardio- Pulmonary Resuscitation (CPR – ventilation and chest compressions) is critical to survival. However maintaining high quality chest compressions during resuscitation is difficult for crews of emergency vehicles, especially if they are on their own, because of fatigue and the need to perform other actions. Chest compression is particularly difficult in moving vehicles. A number of mechanical devices, suitable for out of hospital use, have been developed over the years to improve the quality of chest compressions and therefore attempt to improve patient outcomes. Some NHS organisations decided to purchase devices to use although there is limited evidence of their effectiveness. To equip all emergency vehicles in the NHS would cost tens of millions of pounds plus costs for on-going training and maintenance. This prompted the UK Joint Royal College Ambulance Liaison Committee to advise against the purchase of further mechanical chest compression devices until further research had been carried out. The aim of this trial was to compare the effects of the mechanical chest compressions (LUCAS-2) device versus standard manual chest compressions (crew using their hands) on survival. (more…)
Author Interviews, Heart Disease / 17.11.2014

Dr. Yacov Shacham MD Department of Cardiology Tel-Aviv Sourasky Medical Center, Affiliated to the Sackler Faculty of Medicine Tel-Aviv University, Tel-Aviv, Israel.MedicalResearch.com Interview with: Dr. Yacov Shacham MD Department of Cardiology Tel-Aviv Sourasky Medical Center, Affiliated to the Sackler Faculty of Medicine Tel-Aviv University, Tel-Aviv, Israel. Medical Research: What is the background for this study? What are the main findings? Dr. Shacham: Acute kidney injury (AKI) is a common complication among ST elevation (STEMI) patients undergoing primary percutaneous coronary intervention (PCI), and it is associated with poor long-term clinical outcomes. No studies have yet evaluated the association between cardiac function and the risk of AKI in this patient population. We conducted a retrospective study of consecutive STEMI patients who underwent primary PCI and had a full echocardiography study performed within 72 hours of hospital admission. We evaluated the relation between systolic and diastolic parameters and AKI. We demonstrated that the occurrence of AKI following primary PCI was associated with worse left ventricular systolic and diastolic function, however only left ventricular EF emerged as an independent predictor of AKI. For every 1% reduction in EF, the risk of AKI increased (OR 1.1, 95% CI 0.86-0.96; p=0.001) (more…)
Heart Disease / 17.11.2014

Dr Guillaume Geri, MD Medical Intensive Care Unit Cochin Hospital Paris, FranceMedicalResearch.com Interview with: Dr Guillaume Geri, MD Medical Intensive Care Unit Cochin Hospital Paris, France   Medical Research: What is the background of the study? What are the main findings? Dr. Geri: Culprit coronary artery occlusion is the main cause of out-of-hospital cardiac arrest. This has been well demonstrated since pioneer study of Spaulding et al in the New England Journal of Medicine in 1997. Several studies highlighted the favorable prognostic impact of an immediate successful PCI in cardiac arrest patients but inclusion biases or the lack of data on in-hospital management limit the generalization of such findings. In this large French cohort of out-of-hospital cardiac arrest patients who were admitted after successful return of spontaneous circulation from 2000 to 2012, those who received immediate PCI had better short- and long-term survival than those who did not undergo the procedure, new data presented here concluded. The researchers examined the association between immediate PCI and survival at 30 days, 2 years and 10 years, and evaluated other potential predicting factors. Furthermore, they used a propensity score method to analyze the impact of PCI on 30-day and long-term survival in matched patients. Overall, 1,722 patients (71.5% male; median age, 59.9 years) were analyzed during a median 2 year follow-up. OHCA  (out-of-hospital cardiac arrest ) was witnessed in 86.7% of patients, and occurred in a public space in 32.2% of patients and with an initial shockable rhythm (eg, ventricular fibrillation/ventricular tachycardia) in 54.6% of cases. (more…)
Cannabis, Heart Disease / 17.11.2014

Matthew L. Springer, Ph.D. Associate Professor of Medicine Division of Cardiology Cardiovascular Research Institute Broad Center of Regeneration Medicine and Stem Cell Research Center for Tobacco Control Research & Education Helen Diller Family Comprehensive Cancer Center University of California, San Francisco MedicalResearch.com Interview with: Matthew L. Springer, Ph.D. Associate Professor of Medicine Division of Cardiology Cardiovascular Research Institute Broad Center of Regeneration Medicine and Stem Cell Research Center for Tobacco Control Research & Education Helen Diller Family Comprehensive Cancer Center University of California, San Francisco     Medical Research: What is the background for this study? What are the main findings? Dr. Springer: The general public is aware that cigarette secondhand smoke is harmful. However, many people who actively avoid tobacco secondhand smoke don't feel the need to avoid marijuana secondhand smoke; they don't consider it harmful because there's no nicotine and because we who tell them to avoid tobacco smoke don't tell them to avoid marijuana smoke.  However, secondhand smoke from tobacco and marijuana is very similar in chemical composition (4000-7000 chemicals depending on whom you ask), aside from the nicotine and the THC (the psychoactive drug in marijuana). We and others have shown that brief exposure to tobacco secondhand smoke, such as 30 minutes, at real-world levels impairs vascular function in humans.  We developed a way to study vascular function (measured as arterial flow-mediated dilation; FMD) in living rats, and recently published that even one minute of sidestream smoke from the burning tips of tobacco cigarettes, a well-accepted model for secondhand smoke, is enough to start detecting impairment of FMD.  The main findings of the current study are that in laboratory rats, FMD was substantially impaired by a 30 minute exposure to marijuana secondhand smoke, when measured 10 minutes after the end of exposure.  Impairment was comparable to that resulting from exposure to tobacco sidestream smoke, although whereas impairment from tobacco smoke was temporary and had normalized by 40 minutes later, FMD was still impaired 40 minutes after the end of exposure to marijuana smoke.  Smoke from marijuana lacking THC still impaired FMD, showing that  (more…)
Author Interviews, General Medicine, Heart Disease, JAMA / 16.11.2014

Manesh Patel, MD Associate Professor of Medicine Director Interventional Cardiology and Catheterization Labs Duke University Health System Duke Clinical Research InstituteMedicalResearch.com Interview with: Manesh Patel, MD Associate Professor of Medicine Director Interventional Cardiology and Catheterization Labs Duke University Health System Duke Clinical Research Institute Medical Research: What is the background for this study? What are the main findings? Dr. Patel: In clinical practice, patients with acute myocardial infarction are found to have non-IRA disease of varying significant and location.  The current recommendations are to have patients recover from the acute myocardial infarction and get non-invasive testing to determine revascualrization after 4-6 six weeks in uncomplicated patients.  These data demonstrate that non-IRA disease is common (>50% of STEMI patients) and that these patients have an elevated 30-day mortality. (more…)
Author Interviews, Emergency Care, Heart Disease / 16.11.2014

Dr. Marc-Alexander Ohlow, MD, adjunct Professor of Medicine Cardiology Department Zentralklinik Bad Berka, GermanyMedicalResearch.com Interview with: Dr. Marc-Alexander Ohlow, MD, Adjunct Professor of Medicine Cardiology Department Zentralklinik Bad Berka, Germany MedicalResearch.com: What are the main findings of the study? Dr. Ohlow: This paper reports the finding of a retrospective study including 4.311 consecutive patients with suspected acute coronary syndrome (ACS). Out of them 272 patients with acute onset of chest pain and elevated levels of cardiac necrosis markers did not have significant (≥50% diameter stenosis) coronary artery stenosis on coronary angiography. Aim of this study was to provide further information and understanding of the clinical characteristics and outcome of patients with acute coronary syndrome without critical stenosis, and comparing those with a consecutive series of patients with ACS requiring percutaneous coronary intervention (non-ST-elevation myocardial infarction patients). Patients presenting without significant coronary stenosis, but with chest pain and elevated troponin level were younger, had less severe angina symptoms, were more likely to be women, had lower level of myocardial necrosis markers (troponin and creatine kinase), and had higher left ventricular ejection fraction compared to patients undergoing angioplasty due to significant coronary obstruction. (more…)
Author Interviews, BMJ, Erasmus, Heart Disease / 16.11.2014

Marco Valgimigli, MD, PhD Associate Professor of Medicine Erasmus MC, Thoraxcenter, Rotterdam The NetherlandsMedicalResearch.com Interview with: Marco Valgimigli, MD, PhD Associate Professor of Medicine Erasmus MC, Thoraxcenter, Rotterdam The Netherlands Medical Research: What is the background for this study? What are the main findings? Dr. Valgimigli: Drug-Eluting Stents are regarded as more thrombogenic devices as compared to Bare Metal Stents. We have pooled all available datasets comparing a specific second generation Drug-Eluting Stent, namely cobalt chromium everolimus eluting stent (co-Cr EES) versus Bare Metal Stents and found that cardiac mortality along with all other non-fatal endpoints investigated, including myocardial infarction or stent thrombosis were reduced after co-Cr EES. (more…)