News tagged with heart

Related topics: heart attack · heart failure · heart disease · heart muscle · patients

Heart attack shown to be 'systemic condition'

An acute heart attack should not be viewed in isolation – myocardial infarction is a "systemic" condition with an impact upon the whole body and engenders responses in other organs, such as liver and spleen. That is the ...

Jun 28, 2017
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What is 'moderate' exercise anyway?

(HealthDay)—You've probably heard the U.S. National Institutes of Health's recommendation for most adults to get 30 minutes of moderate exercise on most days to stay fit.

Jun 27, 2017
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Study identifies key player in heart enlargement

The heart is a dynamic muscle that grows and shrinks in response to stressors such as exercise and disease. The secret to its malleability lies in individual cells, which get bigger or smaller depending on the heart's needs. ...

Jun 27, 2017
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Heart

The heart is a muscular organ in all vertebrates responsible for pumping blood through the blood vessels by repeated, rhythmic contractions, or a similar structure in annelids, mollusks, and arthropods. The term cardiac (as in cardiology) means "related to the heart" and comes from the Greek καρδιά, kardia, for "heart."

The heart of a vertebrate is composed of cardiac muscle, an involuntary striated muscle tissue which is found only within this organ. The average human heart, beating at 72 beats per minute, will beat approximately 2.5 billion times during a lifetime (about 66 years). It weighs on average 250 g to 300 g in females and 300 g to 350 g in males.

This text uses material from Wikipedia, licensed under CC BY-SA

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