Cardiology

Cause of ventricular tachycardia determines treatment

Dear Mayo Clinic: Recently, I was diagnosed with ventricular tachycardia, but doctors said a cause cannot be determined. What usually causes this problem? Does knowing the cause make a difference in treatment?

Medical research

A new pathway for an anti-aging drug

In 1972, Easter Island, called Rapa Nui, famous for its moai statues, offered a new wonder: the discovery of the drug rapamycin.

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