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.
Some other possible signs and symptoms of PVCs: 1  Abnormal ECG. 2  Irregular heart beat. 3  Dyspnea. 4  Dizziness. 5  Feeling your heart beat (palpitations) 6  Feeling of occasional, forceful beats. 7  Increased awareness of your heart beat. 8  Perception of a skipped heartbeat.