News tagged with heart

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

Vitamin D does not stop heart attack or stroke

(Medical Xpress)—Taking vitamin D tablets cannot ward off heart attacks or stroke according to a new study from researchers at the University of East Anglia (UEA) published in the American Journal of Cl ...

23 hours ago
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Youths who try e-cigarettes triple since 2011

The number of US youths who have tried e-cigarettes tripled from 2011 to 2013, raising concerns about the potential for a new generation of nicotine addicts, US health authorities said Monday.

Aug 25, 2014
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Heart group: E-cigarettes might help smokers quit

The American Heart Association's first policy statement on electronic cigarettes backs them as a last resort to help smokers quit. The American Cancer Society has no formal policy but quietly took a simil ...

Aug 25, 2014
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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.

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