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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 35 min ago

New 'triple pill' could eliminate high blood pressure

Wed, 08/15/2018 - 15:00
Hypertension is very common, and it's a major cardiovascular risk factor. An innovative 'three in one' pill may help treat it more easily and effectively.

Foods to eat for better sex

Wed, 08/15/2018 - 13:00
Many people look to their diet to find ways of improving their sex lives. People sometimes try known aphrodisiacs to boost libido, or they might want to try heart-healthy foods to improve their stamina. In this article, learn which foods are best for sex and about the research behind the claims.

How much salt does it really take to harm your heart?

Mon, 08/13/2018 - 07:00
A large, international study finds that current dietary guidelines for salt intake are overcautious, and that former evidence may not have been 'the best.'

'Monster' radish might help fight heart disease

Sat, 08/11/2018 - 10:00
The biggest variety of radish on the planet may harbor chemicals that can reduce the risk of cardiovascular disease. A new study investigates.

Can you have hypoglycemia without diabetes?

Fri, 08/10/2018 - 20:00
Hypoglycemia occurs when a person's blood sugar levels drop too low. It can cause dizziness, confusion, and loss of consciousness, among other symptoms. While diabetes is the most common cause of hypoglycemia, it can result from other medical conditions. Learn about them here.

What is the difference between heartburn and acid reflux?

Fri, 08/10/2018 - 17:00
Heartburn is one symptom of the condition acid reflux. Chronic acid reflux may be diagnosed as gastroesophageal reflux disease, or GERD. This article examines the relationship between these three terms. It also describes treatments, associated symptoms, methods of prevention, and when to see a doctor.

Experts advise 'healthful range' rather than 'variety of foods'

Fri, 08/10/2018 - 16:00
The American Heart Association suggest that advice on what to eat should specify healthful eating patterns rather than just say 'eat a variety of foods.'

How red blood cells harm cardiovascular health in diabetes

Thu, 08/09/2018 - 14:00
It takes people with type 2 diabetes longer to recover from cardiovascular injury. They are also more exposed to it. But why? New research investigates.

Too much sleep could be worse for health than too little

Tue, 08/07/2018 - 14:00
Sleeping more or less than 7–8 hours is tied to higher risk of death and cardiovascular problems, with more being worse than less, says global study.

How 30 minutes of hookah smoking affects your heart

Tue, 08/07/2018 - 07:00
New research shows that just one session of waterpipe smoking can raise blood pressure and stiffen the arteries — two risk factors for heart disease.

Scientists link 151 genes to atrial fibrillation

Mon, 08/06/2018 - 16:00
A study of biobank genomic data totaling more than 1 million people identifies 151 candidate genes that are likely associated with atrial fibrillation.

Targeting gut bacteria to reduce heart disease

Mon, 08/06/2018 - 15:00
By preventing gut bacteria from producing a particular chemical, it might be possible to reduce cardiovascular risk. A new study uses a novel approach.

Even low air pollution may cause you serious heart problems

Sun, 08/05/2018 - 07:00
New research suggests that even low levels of air pollution may cause alterations in the heart that are akin to the early stages of heart failure.

What is the Valsalva maneuver?

Thu, 08/02/2018 - 10:00
The Valsalva maneuver is a breathing technique that increases pressure in the chest. Doctors can use it to normalize some abnormally fast heart rhythms. People may also use this technique regularly without knowing it, such as when they push to induce a bowel movement or try to pop their ears. Learn more here.

How are thyroid and cholesterol related?

Mon, 07/30/2018 - 14:00
The thyroid gland produces thyroid hormones that regulate many bodily functions. However, when thyroid levels are too high or too low, they can affect cholesterol levels in the body. This article looks at how thyroid hormones and cholesterol are linked, and what treatments are available to correct any imbalances.

Feeling dizzy after standing may predict dementia

Thu, 07/26/2018 - 15:00
Feeling dizzy when you stand up — or orthostatic hypotension — might predict the development of dementia in later life, according to a new study.

Is my newborn sleeping too much?

Tue, 07/24/2018 - 19:00
Many parents will look forward to their newborn sleeping, but sometimes a newborn will sleep so much that they become concerned. After birth, babies need a lot of rest as they continue to develop and grow. But how much sleep is normal for a newborn and what can parents do about excessive sleep? Learn more here.

Peripheral cyanosis: Causes of blue hands and feet

Tue, 07/24/2018 - 13:00
Peripheral cyanosis is when the fingertips, hands, or feet turn blue or green. This happens when those extreme body parts are not getting enough oxygen from the blood. Cold temperatures, heart, or lung problems can cause peripheral cyanosis. Learn about the causes, symptoms, and treatment here.

Heart health: What to eat and what to avoid

Tue, 07/24/2018 - 10:00
A large review conducted by researchers from the American College of Cardiology examines the heart benefits of several popular foods.

What are the benefits of drinking lime water?

Mon, 07/23/2018 - 20:00
Proper hydration is essential to overall health. Drinking lime water is a great way to keep hydrated, but it may also help in aiding digestion, improving the skin, and helping promote weight loss. To get some of these benefits, simply add a squeeze of juice or a slice of lime to regular water.