A racing heart is usually a sign of agitation or excitement. But if it's not unusual for your heart to beat too fast or to skip a beat, it might be worth having it checked out by a doctor. In order to ...
A 67-year-old man with a history of dilated cardiomyopathy and a left ventricular ejection fraction of 40% presents to his primary care provider for a routine physical examination. His vital signs and ...