A premature ventricular contraction (PVC) is an early heartbeat that happens between
normal heartbeats. Most PVCs are harmless.
How Does a Premature Ventricular Contraction Happen?
The sinus node acts as the
heart's pacemaker. This cluster of cells generates the electrical impulses that
control the heart's rhythm. It's in the right
atrium, in the upper right side of the heart. A PVC happens when an early heartbeat
starts in one of the ventricles, the heart's two lower chambers.
What Are the Signs & Symptoms of Premature Ventricular Contractions?
Premature ventricular contractions can feel like a skipped or pounding heartbeat.
Some kids with PVCs get dizzy and may feel like they're going to faint.
What Causes Premature Ventricular Contractions?
Doctors aren't sure what causes PVCs. Some things that may trigger them are: