Why is Blood Pressure in Women More Sensitive to High Salt Diet?

MedicalResearch.comInterview with:

Eric J. BELIN de Chantemèle, D.Sc.
Associate Professor
Department of Medicine, Cardiology
Augusta University

Eric JBelin de Chantemèle, D.Sc.
Associate Professor
Department of Medicine, Cardiology
Vascular Biology Center
Medical College of Georgia at Augusta University

Jessica L Faulkner, PhD
Post-doctoral Fellow
Vascular Biology Center
Medical College of Georgia at Augusta University

MedicalResearch.com:  What is the background for this study?  What are the main findings?

Response: It is generally accepted in the medical community that women are more salt sensitive than men. By “salt sensitive” we mean that blood pressure increases with increases in salt in the diet.

While we have known for a long time that women are more likely to experience problems with their blood pressure that are associated with the salt that they eat, the reasons why remain largely unknown and, therefore, the best way to treat it is also unknown. With the average American eating roughly twice the salt recommended by the American Heart Association guidelines, the effects of dietary salt on blood pressure are very important. Our latest publication in the journal American Heart Association’s journal Hypertension shows that female mice are more prone to high blood pressure when on a high salt diet than males.

MedicalResearch.com: What should readers take away from your report?

Response: Our report begins to shed some light on why women may have a greater risk of developing high blood pressure due to eating too much salt. We recently found that a hormone, termed “aldosterone” is acting inappropriately in females in response to a lot of salt in the diet. In healthy individuals who are not salt sensitive, aldosterone is decreased by salt in the diet and is protective to the blood vessels. However, in female mice it is less likely that aldosterone will be decreased, and this lack of decrease of aldosterone leads to blood vessel damage and high blood pressure in our study.In contrast, our male mice in our study suppressed aldosterone when given a high salt diet, and did not develop blood vessel damage or high blood pressure.We believe this variation in aldosterone production in women may be a reason why they are clinically more likely to have a blood pressure response to high salt diets.

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Is There a Link Between Iron Intake and Stroke?

MedicalResearch.com Interview with:

Dipender Gill Imperial College Healthcare NHS Trust London, United Kingdom 

Dipender Gill

Dipender Gill
Imperial College Healthcare NHS Trust
London, United Kingdon 

MedicalResearch.com: What is the background for this study? What are the main findings?

Response: Iron status has previously been associated with risk of various types of cardiovascular disease, including stroke. However, the observational research methodologies that identified these associations can be affected by confounding from environmental factors and reverse causation.

We used randomly allocated genetic variants that affect iron status to investigate its effect on risk of different types of ischemic stroke, and found evidence to support that higher iron status increases risk of cardioembolic stroke.

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Low Level Lead Exposure Linked to Resistant Hypertension

MedicalResearch.com Interview with:

Sung Kyun Park Sc.D. M.P.H. Associate professor of epidemiology and environmental health sciences University of Michigan School of Public Health, Ann Arbor, Michiga

Dr. Park

Sung Kyun Park Sc.D. M.P.H.
Associate professor of epidemiology and environmental health sciences
University of Michigan School of Public Health
Ann Arbor, Michigan

MedicalResearch.com: What is the background for this study? What are the main findings?

Response: It is poorly understood that why some patients need more drugs to control high blood pressure than others. Resistant hypertension is that blood pressure is not controlled with 3 medications of different classes including diuretics or is required 4 or more medications of different classes for blood pressure controls. Genes, obesity, physical inactivity, high salt diet, pain medications may do something. Lead is a widespread environmental toxin that can influence high blood pressure. In this study, we examined whether long-term exposure to lead, measured as bone lead, is associated with the risk of resistant hypertension.

Bone lead offers a better method over blood lead measurement to discern long-term lead exposure and accumulation.

The main finding of our study is that low-level lead exposure, measured in the tibia (hard bone), is associated with higher risk of development of resistant hypertension in a cohort of patients diagnosed with hypertension.  Continue reading

2 Million Never-Smokers Now Use E-Cigarettes

MedicalResearch.com Interview with:
"Electronic Cigarette/E-Cigs/E-Cigarettes" by Chris F is licensed under CC BY 2.0Mohammadhassan (Hassan) Mirbolouk, MD
American Heart Association Tobacco Regulation Center (A-TRAC)
Johns Hopkins Hospital
Baltimore, MD 21224.

MedicalResearch.com: What is the background for this study?

Response: E-cigarettes were introduced first in US market as a less harmful method of nicotine delivery which potentially would help smokers to have a less harmful option.

However, overtime e-cigarette found its niche of consumers in the younger/tobacco naïve population. Our study is amongst the first studies that describes those who use e-cigarette without any history of combustible-cigarette smoking.  Continue reading

Mediterranean Diet Linked To Stroke Risk Reduction in Women

MedicalResearch.com Interview with:
“Vegetables” by Wagner T. Cassimiro "Aranha" is licensed under CC BY 2.0Professor Phyo Kyaw Myint MBBS MD FRCP(Edin) FRCP(Lond)
Clinical Chair in Medicine of Old Age
Academic Lead: Ageing Clinical & Experimental Research &
Director of Clinical Academic Training Development
The Lead Academic, Aberdeen Clinical Academic Training (ACAT) Programmes
School of Medicine, Medical Sciences & Nutrition
College of Life Sciences & Medicine, University of Aberdeen

MedicalResearch.com: What is the background for this study? What are the main findings?

Response: While Mediterranean Diet has been linked to reduced stroke risk it remains unclear
(1) its impact on populations within non-Mediterranean countries;
(2) its specific impact on different gender;
(3) the effect observed when using more robust dietary assessments; and (4) which specific components of the diet are most protective.

We therefore studied more than 23 thousand men and women (mainly British Caucasian) aged 40 years or older in Norfolk, UK as part of EPIC-Norfolk study and we found that the greater adherence to Mediterranean dietary pattern is linked to a significant reduction in stroke risk in women but not in men. This benefit was seen across the whole middle and older age population (particularly for women) regardless of their existing risk factors such as high blood pressure.

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Does Routine Oxygen After Heart Attack Reduce Risk of Dying?

MedicalResearch.com Interview with:

Robin Hofmann, MD PhD  Senior consultant cardiologist and researcher Department of clinical science and education Södersjukhuset, at Karolinska Institute

Dr. Hofmann

Robin Hofmann, MD PhD
Senior consultant cardiologist and researcher
Department of clinical science and education
Södersjukhuset, at Karolinska Institute

MedicalResearch.com: What is the background for this study?

Response: Oxygen has been used to treat patients suffering a heart attack for more than a century, despite the fact that such treatment has not had any scientifically proven effect on patients who have normal oxygen levels in their blood. Since the turn of the millennium, researchers worldwide have started to question whether oxygen therapy for heart attacks is ineffective – or may even be harmful.

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