欧博百家乐When to worry about premature ventricular con
Electrical signals in your heart cause it to beat a regular rhythm. The signal usually starts from the sinoatrial node (SA or sinus node). The SA node, a bundle of fibers in the top right portion of the heart (or right atrium), usually sends out an impulse that tells your heart to beat.
But when a person has PVCs, the heart gets an electrical signal from a different area of the heart, known as the Purkinje fibers. These fibers are in the bottom part of the heart (or ventricle). They’re usually where electrical signals tell the ventricles to contract.
The effect of the Purkinje fibers causing the ventricles to contract can delay the next heartbeat. To you, this may feel like your heart is fluttering or as if it skipped a beat.
A PVC might be isolated or several might occur in a row. Doctors define three or more PVCs in a row as ventricular tachycardia, another arrhythmia. PVCs also increase in frequency with age.