Add Yahoo as a preferred source to see more of our stories on Google. You're curled up on the couch, finally relaxing after a long day when suddenly, your heart starts racing. You're obviously not ...

Jolting awake with your heart absolutely pounding is alarming whether you remember having nightmares or seemingly waking up from nothing without explanation. Your mind immediately considers cardiac ...

Dr. Eliza D. Hompe: A 70-year-old woman was evaluated at this hospital because of a racing heart, fatigue, dyspnea, and leg edema. Five months before the current admission, the patient was evaluated ...

You're curled up on the couch, finally relaxing after a long day when suddenly, your heart starts racing. You're obviously not exercising and you don't think you're stressed, so why does it feel like ...