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 ...

Blood flows through the heart and generates noises known as heart sounds. These noises occur due to heart valves opening and closing as the heart pumps blood. A doctor can gain valuable information by ...

Dear Doctor: About 15 years ago, while giving blood, I was advised of an irregularity, which my doctor confirmed after an EKG, known as premature ventricular contractions. He told me not to worry, and ...