Their high calcium content is usually the star of the show, but donât let it blind you to everything else in the can. 1  Sardines also deliver: 2  Selenium (69%) 3  Phosphorus (45%) 4  Iron (15%) 5  Magnesium (9%) 6  Copper (9%) 7  Zinc (8%)
Premature ventricular contractions (PVCs, PVC) are premature heartbeats originating from the ventricles of the heart. Premature ventricular contractions are premature because they occur before the regular heartbeat. Normal function of the heart. The heart has four chambers.
Premature ventricular contractions (PVCs) are heartbeats that occur earlier than they should. These early beats briefly interrupt the heart 's rhythm. A PVC may feel like a skipped heartbeat or a flutter. PVCs are the most common type of change in heart rhythm. They are common in children and teens as well as in adults.