Oncology & Cancer

Study: Obesity slows progress against cancer deaths

Cancer death rates have fallen dramatically in the United States, but factor in obesity, as researchers did at the University of North Carolina Gillings School of Global Public Health, and the picture changes.

Cardiology

Q&A: Treatment for patent foramen ovale

DEAR MAYO CLINIC: I'm 36 and do not have any significant medical concerns, but due to a family member's heart health issues, it was recommended I have a cardiac evaluation. After undergoing an echocardiogram, I was surprised ...

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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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