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The cardiovascular system is comprised of the heart and the network of arteries, veins, and capillaries that carries blood throughout the body. The average adult male has between 5-6 liters of blood while the average adult female has 4-5 liters. Blood transports oxygen and essential nutrients to all of the living cells in the body, and also carries waste products from the tissues to the systems of the body through which they are removed.
Updated: 1 hour 19 min ago

Good news for cyclists: You might live longer

Mon, 04/24/2017 - 07:00
Commuting to work on a bicycle reduces the risk of cardiovascular disease and death from all causes. Forget the bus, and get back in the saddle.

Common antibiotic azithromycin not linked to increased risk of abnormal heartbeat

Thu, 04/20/2017 - 07:00
The commonly used antibiotic azithromycin is not linked to an increased risk of ventricular arrhythmia, an often life-threatening rapid, irregular heartbeat, according to a large study published in...

Insights into mitochondrial 'power grids' increase understanding of heart muscle

Wed, 04/19/2017 - 14:00
New study reveals how the mitochondrial power grid that distributes energy in heart muscle cells limits widespread damage from local failures.

Vitamin B diminishes effects of air pollution-induced cardiovascular disease

Tue, 04/18/2017 - 07:00
B vitamins can mitigate the impact of fine particle pollution on cardiovascular disease, according to new research conducted at Columbia University's Mailman School of Public Health.

Aspirin therapy may not help patients with peripheral vascular disease, researchers find

Mon, 04/17/2017 - 07:00
Aspirin use may not provide cardiovascular benefits for patients who have peripheral vascular disease, an analysis by University of Florida Health researchers has found.

Hot flashes may indicate heart disease risk

Sat, 04/15/2017 - 07:00
A new study investigates the link between the hot flashes experienced during menopause, and endothelial function in younger midlife and older women.

'Good' cholesterol levels reduced with high air pollution exposure

Fri, 04/14/2017 - 07:00
Researchers have found that higher exposure to traffic-related air pollution may be associated with lower levels of high-density lipoprotein cholesterol.

Exercise associated with improved heart attack survival

Thu, 04/13/2017 - 07:00
Chances of survival increased as amount of exercise rose.Exercise is associated with improved survival after a heart attack, according to research published in the European Journal of Preventive...

Fresh fruit may prevent diabetes and related complications

Wed, 04/12/2017 - 07:00
A new study examines the effects of eating fresh fruit among people with and without diabetes. Daily fresh fruit consumption may lower diabetes risk.

Wrist-worn activity trackers offer inconsistent heart rate data

Tue, 04/11/2017 - 07:00
Wrist-worn activity trackers that measure heart rate with a light-emitting diode offer inconsistent heart rate data.

Stem cell drug screen yields potential alternative to statins

Mon, 04/10/2017 - 07:00
Scientists at the Medical University of South Carolina (MUSC) have found that a class of heart failure drugs might decrease low-density lipoprotein (LDL) cholesterol levels in patients who do not...

Endocrine Society issues statement to improve detection of curable forms of hypertension

Mon, 04/10/2017 - 07:00
A new Scientific Statement issued by the Endocrine Society advises healthcare providers on ways to spot hormonal causes of high blood pressure that can be cured with surgery or treated effectively...

More gray hair linked to higher risk of heart disease

Sun, 04/09/2017 - 07:00
A new observational study finds a correlation between the amount of gray hair in adult men and their risk of coronary heart disease.

Larger women almost three times more likely to have atrial fibrillation

Fri, 04/07/2017 - 15:00
A new study examines the link between body surface area, age, and the risk of atrial fibrillation in more than 1.5 million Swedish women.

Targeted prevention of cardiovascular and digestive disorders may have the greatest effect on reducing the risk of death following joint replacement

Fri, 04/07/2017 - 07:00
A study of nearly 720,000 hip and knee replacement patients has shown that clinicians should be aware of a patient's potential for post-operative complications relating to the digestive system as...

Monthly high-dose vitamin D supplementation does not prevent cardiovascular disease

Fri, 04/07/2017 - 07:00
Results of a large randomized trial indicate that monthly high-dose vitamin D supplementation does not prevent cardiovascular disease, according to a study published by JAMA Cardiology.

Yo-yo dieting may raise death risk for people with heart disease

Thu, 04/06/2017 - 15:00
Researchers have associated fluctuations in body weight with greater risk of heart attack, stroke, and death for people with coronary heart disease.

Treating heart failure with muscle stem cell patch

Thu, 04/06/2017 - 07:00
Treating heart failure using muscle stem cells taken from the patient may be a viable option. A new study demonstrates its safety in human patients.

Why do firefighters have an increased risk of heart attacks?

Tue, 04/04/2017 - 07:00
Firefighters have an increased risk of dying from cardiovascular events. A study investigates why this might be the case and how it might be tackled.

Thyroid hormone level may identify people at risk for atherosclerosis

Mon, 04/03/2017 - 14:00
New study suggests that measuring thyroid hormone level may help identify people at risk for atherosclerosis - the main cause of heart attack and stroke.