title: Increase of ventricular extrasystoles after disopyramide.
mesh_terms: D005117:Cardiac Complexes, Premature / Q000139:chemically induced*; D004206:Disopyramide / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011725:Pyridines / Q000009:adverse effects*
chemical_list: D011725:Pyridines; D004206:Disopyramide