title: [Aging and ventricular premature contractions].
mesh_terms: D000328:Adult; D000375:Aging; D005117:Cardiac Complexes, Premature / Q000503:physiopathology*; D005080:Exercise Test; D006339:Heart Rate; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008875:Middle Aged