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.
Techopedia explains Permanent Virtual Circuit (PVC) A PVC is designed to eliminate the need to set up a call connection on frame relay, ATM or X.25 networks. Typically, the physical connections of a frame relay or supported network into various virtual circuits (VC) allow a physical connection to support multiple VCs simultaneously.