Medical research

Sponge-like action of circular RNA aids heart attack recovery

The human genetic blueprint is like a string of code. To follow it, the code, or DNA, is transcribed into shorter strings of RNA. While some of these shorter strings carry instructions for making proteins—the functional ...

Cardiology

SCAI stages of cardiogenic shock stratify mortality risk

A new shock classification scheme released by the Society for Cardiovascular Angiography and Interventions (SCAI) and endorsed by the American College of Cardiology (ACC), American Heart Association, the Society of Critical ...

Cardiology

Adopted baby's unexpected heart problem brought unexpected joy

When their hopes of adopting a child from China were stretched thin by years of wait, Vanessa and Chris Zoog asked for a baby with a physical issue—one who could use an extra dollop of love. Doing so, they learned, would ...

Cardiology

Scientists discover new way fat harms your arteries

Scientists may have found a way that obesity directly damages the arteries and contributes to heart disease—a discovery that they say could eventually lead to new treatments.

Medical research

No bones about it, this protein slows down fracture-healing

Broken bones are a bigger deal the older you are: even after they've healed, the bones of older people are weaker and more likely to re-fracture. And since more than 6 million Americans break a bone each year, figuring out ...

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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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