| PVC | Contractions of the lower chambers of the heart, the ventricles, which occur earlier than usual, because of abnormal electrical activity of the ventricles. The premature contraction is followed by a pause, as the heart electrical system resets itself and the contraction following the pause is usually more forceful than normal. These more forceful contractions are frequently perceived as palpitations. (12 Dec 1998) |
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| PVM virus | An RNA virus of the genus Pneumovirus, a member of the family Paramyxoviridae, occurring normally as latent infection in laboratory mice, but capable of activation by serial intranasal passage and causing pneumonia. Synonym: PVM virus. (05 Mar 2000) |
| PVP | <abbreviation> Polyvinylpyrrolidone. (05 Mar 2000) |
| PVY protease | <enzyme> Potato virus polyprotein expressed in E coli was cleaved depending on the proteolytic activity of above enzyme; amino acid sequence given in first source Registry number: EC 3.4.99.- Synonym: potato virus y protease, protease nia (26 Jun 1999) |