Torsade de pointes caused by disopyramide and hypokalemia.
D004071:Digitalis Glycosides / Q000009:adverse effects; D004206:Disopyramide / Q000009:adverse effects*; D006801:Humans; D007008:Hypokalemia / Q000150:complications; D008297:Male; D008875:Middle Aged; D011725:Pyridines / Q000009:adverse effects*; D013610:Tachycardia / Q000209:etiology*
D004071:Digitalis Glycosides; D011725:Pyridines; D004206:Disopyramide