title: Premature ventricular contraction. Part 1. Clinical significance.
mesh_terms: D000328:Adult; D005117:Cardiac Complexes, Premature / Q000175:diagnosis*; D006321:Heart / Q000503:physiopathology*; D006331:Heart Diseases / Q000175:diagnosis*; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D008875:Middle Aged