Diseases, Conditions, Syndromes

Hydroxyurea may reverse sickle cell-related heart abnormalities

Heart abnormalities are common complications of sickle cell anemia (SCA) that can contribute to severe disease symptoms and even death. A study published today in the journal Blood Advances is the first to find that hydroxyurea ...

Psychology & Psychiatry

Why aren't the unvaccinated getting their shots?

With COVID-19 cases flooding emergency rooms and deaths on the rise among the unvaccinated, Northeastern researchers wanted to know why a sizable portion of the United States remained weary of or flat-out opposed to vaccines.

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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