heart disease Tag
20 Jan Study Finds No Increased Heart Attack Risk in HIV Patients
MedicalResearch.com Interview with: Dr. Daniel Klein, MD Kaiser Permanente Northern California San Leandro Medical Center San Leandro, CA Medical Research: What is the background for this study? Dr. Klein: The prognosis for individuals living with HIV infection has dramatically improved with the availability of potent, well-tolerated and convenient antiretroviral therapies. HIV infection can now be...
19 Jan Periodontitis Linked To Larger Myocardial Infarct Size
MedicalResearch.com Interview with:
Dr. Francisco Mesa
Department of Periodontics,
School of Dentistry, University of Granada, Spain
Medical Research: What is the background for this study? What are the main findings?
Dr. Mesa: The size of an acute myocardial infarct (AMI) is one of the determinants of its severity, i.e., the degree of myocardial necrosis. This necrosis is indicated by peak troponin I levels in the blood. Among the acute myocardial infarct patients in our study, mediated regression analysis demonstrated that troponin I levels were higher, i.e., the infarct size was larger, in those with chronic periodontitis.
18 Jan Novel Intracoronary Imaging Quantifies Lipid in Coronary Artery Vessels
MedicalResearch.com Interview Invitation Dr. Eric Boersma Associate Professor of Clinical Cardiovascular Epidemiology Thoraxcenter, Erasmus Medical Center and Cardiovascular Research Institute COEUR, Rotterdam, the Netherlands MedicalResearch: What is the background for this study? What are the main findings? Dr. Boersma: Near-infrared spectroscopy (NIRS) is a novel intracoronary imaging technique. The NIRS-derived lipid core burden index (LCBI) quantifies the lipid content within the coronary artery wall. This study was designed to evaluate the prognostic value of LCBI in patients with coronary artery disease (CAD) undergoing coronary catheterization (CAG). We learned that patients with high (above the median) LCBI values had 4 times higher risk of coronary events during 1 year follow-up than those with low values.18 Jan Eczema and Atopic Dermatitis Linked To Increased Cardiovascular Risk
MedicalResearch.com Interview with:
Dr. Jonathan L. Silverberg MD PhD MPH
Assistant Professor in Dermatology, Medical Social Sciences and Preventive Medicine
Northwestern University, Chicago, Illinois
Medical Research: What is the background for this study? What are the main findings?
Dr. Silverberg: There is a growing body of literature supporting an association between psoriasis and increased cardiovascular risk. We hypothesized that these associations are not specific to psoriasis. Rather, they likely occur in other chronic inflammatory skin disorders, namely eczema. We studied two large-scale US population-based studies and found that adults with eczema were more likely to smoke cigarettes, drink alcohol and were less physically active. In turn, they also have higher rates of obesity, high blood pressure, prediabetes and type 2 diabetes and high cholesterol. Of note, eczema was associated with these disorders even after controlling for smoking, alcohol consumption and physical activity. This suggests that chronic inflammation and/or other factors related to eczema may also drive increased cardiovascular risk.
15 Jan Personalized Genetic Profile Determines Benefit of Dalcetrapib for Heart Disease
MedicalResearch.com Interview with:
Jean-Claude Tardif MD
Professor of Medicine
Director of the Research Centre
Montreal Heart Institute Montreal, Quebec Canada
MedicalResearch.com: What is the background for this study? What are the main findings?
Dr. Tardif: Epidemiological and mechanistic studies have suggested that high-density lipoproteins (HDL) could have beneficial cardiovascular properties. However, several medications targeting HDL have failed in recent clinical trials, including the CETP inhibitor dalcetrapib in the dal-Outcomes trial. We hypothesized that dalcetrapib would be beneficial in the subset of patients with the appropriate genetic profile. We conducted the pharmacogenomic analysis of approximately 6000 patients from the dal-Outcomes study which showed that patients with the AA genotype at a specific genetic location (rs1967309) of the adenylate cyclase (ADCY9) gene benefited from a 39% reduction in cardiovascular events including cardiovascular death, myocardial infarction, stroke, unstable angina and the need for coronary revascularization when treated with dalcetrapib compared to placebo. In contrast, patients with the GG genotype had a 27% increase in cardiovascular events. We then obtained confirmatory evidence from the dal-Plaque-2 imaging study which revealed that patients with the protective genotype (AA) had a reduction in their carotid artery wall thickness and that those with the genotype associated with clinical harm (GG) had an increase in their wall thickness.
14 Jan Yoga Has Potential To Improve Cardiovascular Risk Factors
MedicalResearch.com Interview with: Paula Chu Doctoral candidate Harvard University's Health Policy Program Boston MA Medical Research: What is the background for this study? What are the main findings? Response: This study was borne out of a mutual interest in the effects of yoga and wellness in general between myself and my coauthors. We had heard and read about yoga's effects on certain conditions like anxiety and pain, and we wanted to see if there was scientific evidence on yoga's impact on measurable physiological cardiovascular outcomes.13 Jan Highly Sensitive Troponins Improve ER Diagnosis of Heart Disease
MedicalResearch.com Interview with: James Louis Januzzi, Jr, MD, FACC, FESC Director, Cardiac Intensive Care Unit Director, Dennis and Marilyn Barry Fellowship in Cardiology Research Massachusetts General Hospital Boston, MA, 02114. Medical Research: What is the background for this study? What are the main findings? Dr. Januzzi: Evaluation for suspected or proven acute coronary syndrome is...
10 Jan Banishing Eggs From Diet May Lead To Worse Food Choices
MedicalResearch.com Interview with:
David L. Katz, MD MPH FACPM FACP
President of the American College of Lifestyle Medicine
Yale University Prevention Research Center
Derby, CT; Griffin Hospital, Derby, CT
Medical Research: What is the background for this study? What are the main findings?
Dr. Katz: We have long advised patients at risk for heart disease to avoid eggs- but have thought relatively little about what they might wind up eating instead. While coronary care units banish eggs, they routinely serve white bread, bagels, pancakes, etc. In general, the exclusion of eggs from the diet may result in more sugary, starchy foods- and if so, might do net harm. We have previously studied egg intake in healthy and dyslipidemic adults, and seen no adverse effects on blood flow or biomarkers in the short term (6 wks). This study examined this issue in adults with coronary artery disease- and again, no adverse effects were seen.
08 Jan Coronary Heart Disease: Bypass Surgery Has Better Outcomes But At Higher Costs Than Stents
MedicalResearch.com Interview with:
Zugui Zhang PhD
Value Institute, Christiana Care Health System
Newark, Delaware
MedicalResearch: What is the background for this study?
Dr. Zhang: The strategies of percutaneous coronary intervention (PCI) and coronary artery bypass grafting (CABG) for revascularization have been compared in randomized clinical trials. Questions still remain concerning the comparative effectiveness of PCI and CABG. The best way to control for treatment-selection bias is to conduct a randomized trial, but such trials often have limited power to evaluate subgroups. More importantly, the results may not be generalizable, since patients are often highly selected. Nonrandomized, observational data from clinical databases can complement data from clinical trials, because observational data, if they are from a larger and more representative population, may better reflect real-world practice.
ASCERT (American College of Cardiology Foundation and the Society of Thoracic Surgeons Collaboration on the Comparative Effectiveness of Revascularization Strategies) was a large observational study designed to compare the long-term effectiveness of CABG and PCI to treat coronary artery disease (CAD) over 4 to 5 years. This study examined the cost-effectiveness of CABG versus PCI for stable ischemic heart disease.
MedicalResearch: What are the main findings?
Dr. Zhang: This study examined the cost-effectiveness of CABG versus PCI for stable ischemic heart disease. Adjusted costs were higher for CABG for the index hospitalization, study period, and lifetime by $10,670, $8,145, and $11,575, respectively. Patients undergoing CABG gained an adjusted average of 0.2525 and 0.3801 life-years relative to PCI over the observation period and lifetime, respectively. The life-time incremental cost-effectiveness ratio of CABG compared to PCI was $30,454/QALY gained.
This study shows that over a period of 4 years or longer, CABG is associated with better outcomes but at higher cost than PCI among older patients with 2- or 3-vessel CAD. Under the assumption that our analysis has fully accounted for both measured and unmeasured confounding, in patients with stable ischemic heart disease, CABG will often be considered cost-effective at thresholds of $30,000 or $50,000/QALY.
07 Jan Healthy Lifestyle In Women Markedly Reduces Cardiovascular Risk
MedicalResearch.com Interview with:
Andrea Kaye Chomistek ScD
Assistant Professor Epidemiology and Biostatistics
Indiana University Bloomington
Medical Research: What is the background for this study? What are the main findings?
Dr. Chomistek: Although mortality rates from coronary heart disease in the U.S. have been in steady decline for the last four decades, women aged 35-44 have not experienced the same reduction. This disparity may be explained by unhealthy lifestyle choices. Thus, the purpose of our study was to determine what proportion of heart disease cases and cardiovascular risk factors (diabetes, hypertension, and high cholesterol) could be attributed to unhealthy habits.
We defined healthy habits as not smoking, a normal body mass index, physical activity of at least 2.5 hours per week, watching seven or fewer hours of television a week, consumption of a maximum of one alcoholic drink per day on average, and a diet in the top 40 percent of a measure of diet quality based on the Alternative Healthy Eating Index.
We found that women who adhered to all six healthy lifestyle practices had a 92 percent lower risk of heart attack and a 66 percent lower risk of developing a risk factor for heart disease. This lower risk would mean three quarters of heart attacks and nearly half of all risk factors in younger women may have been prevented if all of the women had adhered to all six healthy lifestyle factors.
07 Jan Cardiac Defect of Hypertrophic Cardiomyopathy Aggravated By Life Stresses
MedicalResearch.com Interview with:
Sakthivel Sadayappan, PhD, MBA
Associate Professor Department of Cell and Molecular Physiology
Loyola University Chicago Health Sciences Division
Maywood, IL 60153-5500, USA.
MedicalResearch: What is the background for this study? What are the main findings?
Dr. Sadayappan: Hypertrophic cardiomyopathy (HCM) is the most common form of genetic heart defect, affecting 1 in 500 people in the general population. HCM results in excessive thickening of heart muscle without an obvious cause, such as hypertension or exercise stress. Often, HCM results in sudden cardiac arrest as a result of cardiac arrhythmia. Electrocardiogram, echocardiogram and cardiac magnetic resonance imaging are commonly used to diagnose HCM. However, genetic defects in more than 10 genes could also cause HCM, and standard screening for these genes is readily available. Notwithstanding our ability to diagnose the disease, a major challenge arises from its heterogeneity. That is, individuals with the same genetic defect often present with different symptoms, ranging from no symptoms at all to severe heart enlargement. Therefore, treatment options vary from person to person, and, at present, no permanent cure is available for HCM. Beta-blockers, calcium antagonists and anti-arrhythmic drugs are currently being used to manage the disease. However, scientists must discover the reasons that explain why some people experience more severe symptoms than others.
In today’s modern world, people are afflicted with stresses including, for example, diabetes, hypertension, hyperlipidemia (high cholesterol), and alcoholism. Therefore, we have hypothesized that additional cardiac stresses can aggravate the onset of Hypertrophic cardiomyopathy. To prove our hypothesis, we used a mouse model having a genetic defect known to affect cardiac muscle contractility. We subjected these mice to severe cardiac stress over a period of 12 weeks. Compared with normal mice, we found that the mutant mice showed significant cardiac abnormalities, including those associated with HCM. Thus, this demonstrated, for the first time, that additional cardiac stress applied in the presence of known genetic defects exacerbates the onset of HCM.
07 Jan Calcium Score and Coronary CT Offer Additive Prognostic Values in Coronary Artery Disease
MedicalResearch.com Interview with:
Dr. Kongkiat Chaikriangkrai MD
Department of Medicine, Houston Methodist Hospital
Houston, TX 77030
Medical Research: What is the background for this study?
Dr. Chaikriangkrai: Coronary computed tomography angiography (CCTA) and coronary artery calcium score are well known to be useful tools for patients suspected for coronary artery disease. Although both imaging studies are similar in many ways (e.g. CT-based studies, anatomical evaluation of coronary artery disease, etc.), they are completely independent tests that measure different aspects of coronary artery. Furthermore, each test also requires its own separate scan.
In earlier times, calcium score testing was routinely performed prior to CCTA since high calcium score can affect diagnostic accuracy of CCTA. Therefore, CCTA may not be the best option for patients who are known to have high calcium score and other tests along the line can be further considered. However; there have been debates over the need for calcium score scan in this setting alone without enough evidence of additive prognostic benefit of measuring calcium score on top of CCTA due to concerns of extra radiation exposure from performing CT scanning twice.
From this very clinical question, our study was designed to examine whether there was any additional benefit of measuring calcium score over CCTA alone (i.e. Does a patient with high calcium score have worse prognosis than a patient with lower calcium score given that both have similar CCTA results?)
Medical Research: What are the main findings?
Dr. Chaikriangkrai: Our study found that both CCTA and calcium score testing carried its own prognostic value which was independent from each other. Furthermore, measuring calcium score also gave extra ability to predict bad clinical outcomes on top of the information obtained from CCTA alone in patients suspected for coronary artery disease (i.e. A patient with high calcium score did have worse prognosis than a patient with lower calcium score given that both have similar CCTA results).
05 Jan Depression Linked To Functional Decline In Heart Disease Patients
MedicalResearch.com Interview with:
Nancy L. Sin, Ph.D. Postdoctoral Fellow
Center for Healthy Aging & Department of Biobehavioral Health
The Pennsylvania State University
University Park, PA 16802
Medical Research: What is the background for this study? What are the main findings?
Dr. Sin: Older patients with coronary heart disease often experience declines in functional status, which is the ability to perform daily activities such as bathing, walking, and doing housework. The key factors that contribute to functional status among cardiac patients are not well-understood. Previous studies have found only weak or no associations between cardiovascular disease severity and functional status. Psychological factors—such as depression—are known to increase the risk of functional impairment, but this has not been studied long-term in patients with coronary heart disease.
It is unclear the extent to which long-term functional status is determined by psychological factors versus cardiovascular disease severity. The purpose of our study was to compare the contributions of depressive symptoms with those of cardiovascular disease severity (specifically, left ventricular ejection fraction, exercise capacity, and angina frequency) for predicting subsequent functional decline in 960 older adults with stable coronary heart disease.
Across a 5-year period, people who had more severe depressive symptoms were at greater risk of functional decline, independent of cardiovascular disease severity, demographics, health behaviors, cognitive function, and other factors. Low exercise capacity was also strongly related to future functional decline, but ejection fraction and angina frequency were not. These findings underscore the importance of considering both mental and physical health in determining long-term functional status.
02 Jan Elders Requiring Fewer Hospital Days After Aortic Valve Surgery
Posted at 01:06h
in Annals Thoracic Surgery, Author Interviews, Heart Disease, Surgical Research, Yale
MedicalResearch.com Interview with:
Karthik Murugiah MBBS
Fellow in Cardiovascular Medicine
Yale School of Medicine
Center for Outcomes Research and Evaluation (CORE)
New Haven, CT 06510
Medical Research: What is the background for this study? What are the main findings?
Response: Aortic valve disease is common among older people and frequently requires valve replacement. 1-year survival after open surgical aortic valve replacement is high (9 in 10 survive the year after surgery). Our study focuses on the experience of these survivors in terms of the need for hospitalization during the year after surgery.
Among patients >65 years of age enrolled in Medicare who underwent surgical replacement of their aortic valve and survived at least one year, 3 in 5 were free from hospitalization during that year. Both, the rates of hospitalization and the average total number of days spent in the hospital in the year following surgery have been decreasing all through the last decade (1999 to 2010).
30 Dec High Maintenance Dose Clopidogrel After PCI May Reduce Adverse Events
MedicalResearch.com Interview with: Yan Liang, MD, PHD on behalf of co-authors Emergency and Intensive Care Center, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China Medical Research: What is the background for this study? What are the main findings? Response: The background of this study is mainly derived from the results of CURRENT-OASIS7 which has shown a 7-day 150 mg maintenance dose (MD) clopidogrel could reduce cardiovascular events among subgroup patients undergoing percutaneous coronary intervention (PCI) compared with the 75 mg/day regimen. We conducted a meta-analysis based on 17 randomized controlled trials to determine whether prolonging the high MD clopidogrel (≥150 mg) treatment period to at least 4 weeks could reduce major adverse cardiac events (MACEs) in the PCI patients with and without high on-clopidogrel platelet reactivity (HPR). Our study concluded that the high maintenance dose clopidogrel was associated with a significant reduction in the risk of MACEs in PCI patients without increasing the rate of “Major/Minor bleeding” or “Any bleeding” in comparison with standard 75mg MD clopidogrel, and the “HPR Patients” subgroup were also benefited from such high MD treatment.27 Dec How Much Salt Intake Is Recommended For Patients With Heart Disease?
MedicalResearch.com Interview with:
Jordi Salas-Salvadó Professor of Nutrition
Human Nutrition Unit Department of Biochemistry & Biotechnology
IISPV School of Medicine.
Rovira i Virgili University CIBERobn, Instituto Carlos III
Medical Research: What is the background for this study? What are the main findings?
Response: Excess sodium intake is associated with high blood pressure, a major risk factor for cardiovascular disease (CVD). The 2010 Dietary Guidelines for Americans recommended a sodium intake below 2300 mg per day (equivalent to less than 1 teaspoon of salt per day) in the general population. However it is unknown whether decreasing sodium intake below 2300 mg/d has an effect on CVD or all-cause mortality. The recent Institute of Medicine (IOM) explicitly concluded that studies on health outcomes are inconsistent in quality and insufficient in quantity to determine that sodium intake below 2300 mg/d may increase or decrease the risk of heart disease, stroke or all cause of mortality.
26 Dec Pig Model Allows Further Study Of Sudden Cardiac Death Syndromes
MedicalResearch.com Interview with:
Dr. Glenn I. Fishman MD
Professor; William Goldring Professor of Medicine
Vice Chair Research Dept of Medicine
Director of the Leon H. Charney Division of Cardiology
NYU Langone
Medical Research: What is the background for this study? What are the main findings?
Dr. Fishman: Sudden cardiac arrest (SCA) due to life-threatening ventricular arrhythmias is one of the leading causes of death in the US. Conditions that predispose to SCA can be acquired, as in atherosclerotic coronary artery disease, or inherited in the form of mutated cardiac ion channels, i.e. ion channelopathies. Mutations in the SCN5A cardiac sodium channel gene have been linked to progressive cardiac conduction disorders as well as atrial and ventricular arrhythmias. Understanding the mechanistic basis for lethal arrhythmias in cardiac sodium channelopathy patients has been limited in part due to the lack of adequate model systems that replicate human physiology. To address this limitation, we have developed the first genetically modified porcine model of an inherited channelopathy. A mutation in the SCN5A gene first identified in a child with the arrhythmic condition Brugada syndrome was introduced into the pig genome. Mutant pig hearts displayed conduction abnormalities and ventricular fibrillation bearing striking resemblance to the human condition.
24 Dec CABG Risk Greater For Women
Posted at 12:36h
in Author Interviews, Baylor University Medical Center Dallas, Heart Disease, Race/Ethnic Diversity
MedicalResearch.com Interview with: Giovanni Filardo, PhD, MPH Director of Epidemiology, Baylor Scott & White Health, Dallas, TX The Bradley Family Endowed Chair in Cardiovascular Epidemiology, Baylor University Medical Center Director of Cardiovascular Epidemiology, The Heart Hospital Baylor, Plano, TX Research Associate Professor of Statistics, Southern Methodist University, Dallas, TX Medical Research: What should clinicians and patients take away...
20 Dec Mesenchymal Stem Cells Did Not Prevent Kidney Injury After Heart Surgery
MedicalResearch.com Interview with:
Madhav Swaminathan, MBBS, MD, FASE, FAHA
Associate Professor with Tenure
Clinical Director, Division of Cardiothoracic Anesthesiology & Critical Care Medicine Department of Anesthesiology
Duke University Health System Durham, NC 27710
Medical Research: What is the background for this study? What are the main findings?
Dr. Swaminathan: The background is the need for salvage therapies for acute kidney injury (AKI,) which is a common complication in hospitalized patients. It is particularly a problem in the postoperative period after cardiac surgery. Preventive strategies have not worked well for decades. Hence the focus on strategies that target kidney recovery. Mesenchymal stem cells have been shown to be useful in enhancing kidney recovery in pre-clinical trials. We therefore hypothesized that administration of human Mesenchymal stem cells (AC607, Allocure Inc, Burlington, MA) to patients with established post-cardiac surgery AKI would result in a shorter time to kidney recovery. We conducted a phase 2, double blinded, placebo controlled, randomized clinical trial to test our hypothesis. Unfortunately we could not confirm the hypothesis and there were no significant differences in time to kidney recovery among patients that received AC607 versus placebo in 156 randomized cardiac surgery subjects.
18 Dec Age of Menarche Linked To Heart Disease Onset
MedicalResearch.com Interview with: Dexter Canoy, PhD Cancer Epidemiology Unit, Nuffield Department of Population Health University of Oxford, United Kingdom Medical Research: What is the background for this study? What are the main findings? Response: Over a million middle-aged women in the UK who took part in our study between 1996 and 2001 provided information regarding their health and lifestyle, including their reproductive history such as age when they had their first menstruation. We followed them for over 10 years and identified those who developed heart disease (and other vascular diseases) by obtaining information on hospitalizations and death records. Our study demonstrates that on average, women with menarche before age 13 or after this age have slightly increased risks of developing heart disease, stroke and hospital admissions associated with hypertension. The increased risks for these vascular diseases were highest in women with menarche at age 10 years or younger, or age 17 years or older. This U-shaped association was consistently found among lean, overweight and obese women, among never, past or current smokers, or among women in low, middle or high socioeconomic group.17 Dec Cocaine Chief Cause of Cardiovascular Death In Young People
MedicalResearch.com Interview with: Luis F. Callado M.D., Ph.D. Department of Pharmacology University of the Basque Country CIBERSAM Medical Research: What is the background for this study? What are the main findings? Dr. Callado: Cocaine is the most commonly used illicit stimulant drug in Europe. The use of cocaine has become a major issue for drug policy, with also important health implications, including potentially lethal cardiovascular complications. In this way, several case series have suggested a relationship between cocaine use and cardiovascular diseases in young adults. Furthermore, cocaine use has been also associated with sudden and unexpected death. Our results demonstrate that the recent use of cocaine is the main risk factor for sudden cardiovascular death in persons between 15 and 49 years old. Thus, persons that consumed cocaine recently presented a 4 times higher risk for sudden cardiovascular death than those who did not use cocaine. The morphological substrate of sudden cardiovascular death associated to cocaine use is a structural pathology not diagnosed in life. Usually, sudden death is the first manifestation of the disease.13 Dec Reducing Added Sugar May Reduce Hypertension and Obesity
MedicalResearch.com Interview with:
James J. DiNicolantonio, PharmD
Associate Editor BMJ Open Heart
Cardiovascular Research Scientist
Saint Luke's Mid America Heart Institute
Medical Research: What is the background for this study? What are the main findings?
Dr. DiNicolantonio: Cardiovascular disease is the leading cause of premature mortality in the developed world, and hypertension is its most important risk factor. Controlling hypertension is a major focus of public health initiatives, and dietary approaches have historically focused on sodium.
A reduction in the intake of added sugars, particularly fructose, and specifically in the quantities and context of industrially-manufactured consumables, would help not only curb hypertension rates, but would also help address broader problems related to cardiometabolic disease.
13 Dec Bone Protein May Be Marker of Cardiac Dysfunction
MedicalResearch.com Interview with: Mette Bjerre, Associate Professor, PhD Medical Research Laboratory Aarhus University Hospital & Aarhus University Aarhus C Denmark Medical Research: What is the background for this study? What are the main findings? Dr.Bjerre: Recently, a connection between bone regulatory proteins and vascular biology has attracted attention, suggesting osteoprotegerin (OPG), a secreted glycoprotein that regulates bone resorption, as a possible mediator of vascular calcification. Indeed, we and others has shown that high levels of circulating OPG predicts long-term outcome in patients with cardiovascular disease (CVD). However, the mechanism remains poorly understood. In order to elucidate the role of OPG in patients with ST-elevation myocardial infarction (STEMI) treated with primary percutaneous coronary intervention (pPCI), our study aimed to evaluate the progression of OPG levels, in four consecutive blood-samples obtained pre-PCI, post-PCI, day 1 and day 2. OPG levels did indeed change during treatment. OPG levels peaked post-PCI and then decreased; mean concentrations (95% confidence interval) pre-PCI 2650ng/L (2315-3036ng/L), post-PCI 2778ng/L (2442-3363ng/L), day 1 2024ng/L (1775-2306ng/L) and day 2 1808ng/L (1551-2106), (repeated measures ANOVA, F=33.192, p<0.001). Additional, high OPG level is independently associated with impaired LVEF (LVEF < 40%). Adjustment for BMI and traditional cardiovascular risk factors (hypertension, hypercholesterolemia, diabetes and current smoking) did not significantly impact the association between OPG response and reduced LVEF.13 Dec Supplement May Reduce Cardiovascular Risks Linked to NSAIDS
MedicalResearch.com Interview with: Dr. Jane A. Mitchell National Heart and Lung Institute Imperial College, London, UK Medical Research: What is the background for this study? What are the main findings? Dr. Mitchell: Anti-inflammatory drugs (NSAIDs) work by inhibiting the enzyme COX-2. COX-2 selective anti-inflammatory drugs, like Vioxx, were introduced to reduce gastrointestinal side effects associated with these drugs. However, COX-2 inhibitors as well as most older NSAIDs are associated with increased risk of heart attacks although the precise mechanisms underlying these side effects are not completely understood. The main findings of this study are: 1) COX-2 is highly expressed in the kidney where its genetic deletion leads to changes in more than 1000 genes. 2) Analysis of these genes revealed changes in 2-3 specific genes that regulate levels of ADMA, an endogenous inhibitor of the nitric oxide released by vessels, that can be reversed by giving more of the substrate for NO, L-arginine. 3) Further studies showed that ADMA was indeed increased in the plasma of mice where COX-2 gene was knocked out or in normal mice given a COX-2 inhibitor. 4) In mice where COX-2 was knocked out the release of nitric oxide from vessels was reduced and this could be reversed by supply L-arginine. 5) ADMA was also increased in human volunteers taking a COX-2 inhibitor11 Dec Coenzyme Q Deficiency May Contribute To Aging and Heart Disease
MedicalResearch.com Interview with: Jane Tarry-Adkins BSc Biochemistry Research Assistant University of Cambridge · Institute of Metabolic Science
Medical Research: What is the background for this study? What are the main findings? Response: From epidemiological and animal studies, it has been known for several years that a suboptimal in utero environment that causes low birth weight combined with accelerated postnatal growth is strongly linked to increased risk of cardiovascular disease (CVD). However underlying molecular mechanisms for this phenomenon, known as ‘developmental programming’ are still unknown. In this study, we used a rat model where animals are born small because their mother ate a low protein diet during pregnancy but grow quickly during lactation when they are suckled by a control diet fed mum. These ‘recuperated’ rats displayed indices of accelerated aortic cellular aging and damage which was associated with a deficit in coenzyme Q (CoQ); (the most abundant endogenous antioxidant in the body), compared to offspring of a normal birth-weight. When these ‘recuperated’ offspring were supplemented with a clinically relevant dose of coenzyme Q, this corrected these markers of aortic cellular aging and aortic damage. Importantly, measurement of CoQ in white blood cells (WBCs) a clinically accessible tissue demonstrated a coenzyme Q deficit in these ‘recuperated’ offspring. Importantly, this strongly correlated with aortic CoQ levels. Furthermore, we also showed a highly significant relationship between CoQ levels and aortic telomere length in WBCs, suggesting that low WBC CoQ levels can predict short aortic telomeres, and therefore susceptibility to aortic disease.11 Dec Lipid Metabolites in Blood Predictive of Future Coronary Artery Disease
MedicalResearch.com Interview with: Prof. Erik Ingelsson, MD, PhD, FAHA Professor of Molecular Epidemiology and Andrea Ganna PhD student Uppsala University Medical Research: What is the background for this study? What are the main findings? Response: Coronary heart disease (CHD) comprises a major cause of morbidity and mortality throughout the world. Measurement of metabolites, small molecules, in the blood could allow earlier diagnosis and inform about mechanisms leading to CHD. We examined the metabolic profiles (including thousands of metabolites) of blood samples from more than 3,600 individuals from Sweden that had been followed-up for up to 10 years, and found two lipid-related metabolites, lysophosphatidylcholine and sphingomyelin that reduced the risk of developing coronary heart disease and another lipid metabolite, monoglycerides, that was instead associated with increased risk.07 Dec Diabetes and Cardiovascular Disease Share Several Key Driver Genes
MedicalResearch.com Interview with:
Simin Liu, MD, ScD, Professor of Epidemiology
School of Public Health, Professor of Medicine
The Warren Alpert School of Medicine
Director, Molecular Epidemiology and Nutrition
Brown University
MedicalResearch: What is the background for this study? What are the main findings?
Dr. Liu: Cardiovascular Disease (CVD) and type 2 diabetes (T2D) are highly heritable and share many risk factors and show ethnic-specific prevalence. Nevertheless, a comprehensive molecular-level understanding of these observations is lacking. We conducted a comprehensive assessment of whole genome assessment using network-based analysis in >15,000 women and identified eight molecular pathways share in both diseases as well as several “key driver” genes that appear to form the gene networks in which these pathways connect and interact.
28 Nov High Quality Diet Reduces Systemic Inflammation
MedicalResearch.com Interview with:
Joana Alves Dias, MPH
Department of Clinical Sciences in Malmö,
Lund University Malmö, Sweden
Medical Research: What is the background for this study? What are the main findings?
Response: The evidence that chronic inflammation may be in the genesis of diseases such as cardiovascular disease, type-II diabetes, and certain types of cancer is increasing. It is suggested that lifestyle factors such as diet, physical activity, smoking, and alcohol consumption could influence the inflammatory state. Instead of focusing on single nutrient effects, we used a hypothesis-driven approach to food pattern studies, and constructed a diet quality index based on the Swedish Nutrition Recommendations and Swedish Dietary guidelines (DQI-SNR). The DQI-SNR consisted of 6 components. Individuals were assigned 0 when not adhering to a recommendation and 1 when adhering, resulting in total scores ranging from 0 to 6. We classified individuals in low (0 or 1 points), medium (2 or 3) and high (4-6 points) diet quality. We explored the association between the index scores and low-grade inflammation.
Our study indicates that adherence to a high quality diet is associated with lower systemic inflammation, as measured by several soluble and cellular biomarkers of inflammation, in middle-aged individuals. In other words, adherence to the general nutrition recommendations could help prevent the development of diseases associated with chronic inflammation. The anti-inflammatory effects of Mediterranean-like diets have been studied extensively, but this study focused on the Swedish dietary habits and recommendations for the Swedish population, and reached similar conclusions.
28 Nov Congenital Heart Disease Linked To Long Term Inpatient Costs
MedicalResearch.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.