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.
PVCs are also called premature ventricular complexes, ventricular premature beats and extrasystoles. Symptoms, Causes and Diagnosis of PVCs Symptoms of PVCs include a fluttering or flip-flop feeling in the chest, pounding or jumping heart rate, skipped beats and palpitations, or an increased awareness of your heartbeat.