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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: 2 hours 34 min ago

E-cigarette flavorings may impair heart muscle function

Mon, 11/20/2017 - 08:00
By studying heart muscle cells in the laboratory, researchers found that some flavorings in e-cigarette liquids, such as citrus, may have harmful effects.

What is bigeminy?

Sun, 11/19/2017 - 11:00
A look at bigeminy, a condition where the heart's rhythm feels off-kilter. Included is detail on the definition and diagnosis of the condition.

Generous people 'listen to their hearts,' quite literally

Sat, 11/18/2017 - 08:00
New research measures interoception, or people's ability to 'listen' to their bodies, and their willingness to give away money. The heart plays a key role.

Your dog could help you live longer

Sat, 11/18/2017 - 08:00
Your pooch is not just great company. A new study finds that our four-legged friends could reduce the likelihood of premature death.

'Good' cholesterol not so good at preventing heart disease

Fri, 11/17/2017 - 17:00
Raising levels of the so-called good cholesterol by blocking the activity of a certain protein does not seem to protect against heart disease.

Chronic or persistent A-fib: What you need to know

Fri, 11/17/2017 - 15:00
Chronic atrial fibrillation can cause dizziness, heart palpitations, and fatigue. Learn more about this long-term cardiac condition.

The 10 best blood pressure apps

Thu, 11/16/2017 - 16:00
Blood pressure can be managed through apps that can track and monitor your levels and reduce your risk factors for developing high blood pressure.

Eat more leafy greens and whole grains to lower heart failure risk

Wed, 11/15/2017 - 08:00
Emerging research suggests that a predominantly plant-based diet of dark, leafy greens, beans, fruits, and whole grains may reduce heart failure risk.

Nuts may protect against heart disease

Tue, 11/14/2017 - 16:00
New research focuses on the benefits that different nut types have on cardiovascular health. Regular consumption may keep heart disease at bay.

Diabetes: Sudden cardiac death risk sevenfold higher in young people

Tue, 11/14/2017 - 15:00
A new Danish study suggests that young people with diabetes may have seven times the risk of sudden cardiac death than young people without the disease.

Coffee drinkers at lower risk of heart failure, stroke

Tue, 11/14/2017 - 08:00
Research looking at three large population studies suggests that drinking coffee is associated with a lower risk of experiencing stroke and heart failure.

Eating too fast may lead to weight gain, heart disease

Tue, 11/14/2017 - 08:00
Japan-based researchers find that eating too fast may lead to metabolic syndrome, which is a cluster of risk factors for severe cardiometabolic conditions.

More TV viewing linked to higher risk of blood clots in veins

Mon, 11/13/2017 - 15:00
A large study finds that people's risk of developing blood clots in their veins rises with amount of TV viewing, even if they meet exercise guidelines.

Don't worry, sex is unlikely to trigger cardiac arrest

Mon, 11/13/2017 - 08:00
A study conducted by top research institutions reassures us that sudden cardiac arrest is unlikely to occur during, or immediately after, sexual activity.

E-cigarettes may slow down your heart rate

Mon, 11/13/2017 - 08:00
A new study examines the effects of two aerosols commonly found in electronic cigarettes on the heart rate of mice and finds an adverse cardiac reaction.

What is a sinus arrhythmia?

Sun, 11/12/2017 - 08:00
Sinus arrhythmias commonly cause irregular heartbeats in children. In this article, we look at the symptoms, types, and outlook for sinus arrhythmia.

Financial worries may raise heart attack risk by 13-fold

Sat, 11/11/2017 - 08:00
Those who experience a significant level of financial stress are 13 times more likely to have a heart attack, according to new research.

What are the health benefits of purple rice?

Fri, 11/10/2017 - 08:00
In this article, we take a look at the health benefits of purple rice. Included is information on its nutritional value, and how best to cook it.

Does blood flow from the heart affect memory?

Thu, 11/09/2017 - 08:00
Emerging research shows that reduced blood flow from the heart is tied to poor circulation in the brain's memory 'hub,' where Alzheimer's also originates.

Brisk walking may help older women live longer

Wed, 11/08/2017 - 15:00
A study of physical activity in older women tied brisk walking or similar exercise to a 60–70 percent lower risk of early death, compared with inactivity.