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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: 55 min 18 sec ago

Can cottonseed oil help lower your 'bad' cholesterol?

Fri, 11/02/2018 - 15:00
A recent study takes a look at how adding cottonseed oil to a high-fat diet impacts a person's levels of 'good' and 'bad' cholesterol, among other factors.

What is obesity and what causes it?

Fri, 11/02/2018 - 07:00
Obesity is when a person is carrying excessive weight. This puts them at a higher risk of a number of health conditions. Find out more about what obesity is and why it happens.

Can fermented dairy shield you against heart disease?

Thu, 11/01/2018 - 16:00
Whether or not dairy is good for health has become a controversial topic. New research suggests that fermented dairy may protect the heart.

Spider phobia: Using the heartbeat to improve treatment

Thu, 11/01/2018 - 14:00
Computerized therapy of spider phobia was more effective when exposure to spider images occurred during, rather than between, heartbeats, a study revealed.

Is chest pain during exercise serious?

Mon, 10/29/2018 - 17:00
A range of health issues can cause chest pain during exercise. Some, such as muscle strains, are not serious. Others, such as heart attacks and angina, can be life-threatening. In many cases, people should quickly seek treatment. Learn more about the potential causes here.

Too much iron may raise the risk of certain strokes

Fri, 10/26/2018 - 15:00
New research finds that people with higher levels of iron are at a higher risk of stroke that arises from clots and blockages that travel from the heart.

How much should I weigh? Ways of measuring

Fri, 10/26/2018 - 07:00
What is a person’s ideal weight, and how do height, age, and other factors affect it? Find out more and use our tools to get a better idea of how much you should weigh.

Stroke: Can lifestyle changes trump genetic risk?

Fri, 10/26/2018 - 07:00
Stroke risk depends on many factors, some of which are genetic and some lifestyle-related. So, can lifestyle changes outweigh the genetic risk?

This unlikely culprit may cause drug-resistant high blood pressure

Thu, 10/25/2018 - 16:00
A study of 475 male veterans with hypertension links higher lead buildup in shin bone to increased risk of drug-resistant high blood pressure.

Heart attack: New finding may change the face of treatment

Thu, 10/25/2018 - 14:00
New research from Sweden reveals that certain antibodies are highly present in people who have had a heart attack, which may have important implications.

What to know about aortic dissection

Wed, 10/24/2018 - 14:00
Aortic dissection occurs when the inner lining of the aorta splits and tears. Aortic dissection is a medical emergency with a high rate of mortality, and early treatment will improve a person's outlook. In this article, we take a close look at the causes, symptoms, treatment, and survival rates of aortic dissection.

What to know about cardiac tamponade

Tue, 10/23/2018 - 15:00
Cardiac tamponade is a fluid buildup around the heart that constitutes a medical emergency. We discuss the causes, symptoms, and treatment of cardiac tamponade here.

Can a vitamin combo prolong your life?

Thu, 10/18/2018 - 07:00
A new review finds that 30 known vitamins and minerals, as well as 11 other compounds, are crucial to maintaining health and prolonging the lifespan.

Heart surgery: Does it impact cognitive ability?

Wed, 10/17/2018 - 14:00
A new review looks at the impact of heart valve surgery on cognitive ability. A deficit may occur during the first few months, but more study is needed.

Can you take too much magnesium?

Tue, 10/16/2018 - 14:00
Magnesium is essential for health, but taking too much can cause problems, including digestive issues, lethargy, and an irregular heartbeat. In rare cases, an overdose can be fatal. Learn more here.

What tests are used to diagnose COPD?

Mon, 10/15/2018 - 17:00
As well as carrying out a physical examination and gathering a person’s medical history, doctors typically order one or more tests to diagnose chronic obstructive pulmonary disease (COPD). These tests may include pulmonary function tests, blood tests, and imaging tests. Learn more here.

Can COPD cause anxiety?

Mon, 10/15/2018 - 14:00
People with chronic obstructive pulmonary disease (COPD) may experience breathlessness. This physical symptom can trigger anxiety and panic in some people. Breathing exercises, medication, and other techniques can help people control these psychological symptoms. Learn more about COPD and anxiety here.

Could it be possible to eliminate clogged arteries?

Sun, 10/14/2018 - 07:00
A new review concludes that by targeting B lipoproteins in middle-aged people, we could prevent atherosclerosis and associated cardiovascular diseases.

What are the health effects of chronic stress?

Fri, 10/12/2018 - 14:00
Stress is a biological response to demanding situations and a regular part of daily life. Stress becomes chronic when the body’s response goes on for a prolonged period. Chronic stress can have a range of health effects. Learn more about these effects and how to manage chronic stress here.

Seed oils are better for cholesterol than olive oil

Thu, 10/11/2018 - 16:00
A network meta-analysis of 55 studies suggests that safflower, rape, sunflower, and other seed oils are the best vegetable oils for improving cholesterol.