Premature ventricular contraction (PVC) is a type of abnormal heartbeat, or arrhythmia. It happens when the heartbeat begins in the lower, rather than the upper, heart chambers. This creates an ...

An arrhythmia is an atypical heartbeat that is either much faster or slower than expected. Your heartbeat may be described as chaotic, rather than steady and predictable. There are several types of ...

DEAR MAYO CLINIC: I've noticed that sometimes my heart races or skips a beat. What causes this? Is there treatment for it? ANSWER: What you're experiencing may be an abnormal heart rhythm, also known ...

Irregular heartbeats, or arrhythmia, can significantly affect a person’s quality of life and overall health. When medication and lifestyle changes are ineffective, doctors may recommend surgery to ...