Monophasic action potential-like electrocardiogram simulating acute myocardial infarction.
Monophasic action potential-like electrocardiogram simulating acute myocardial infarction has been reported in patients with hyperkalemia. We report two cases presenting marked diffuse RS-T elevation resembling monophasic action potential. They had abnormal electrolyte levels, including hyperkalemia and hypocalcemia in case 1 and hypokalemia and hypocalcemia in case 2. The ECG abnormality returned to baseline after correction of potassium and calcium. We conclude that monophasic action potential-like electrocardiogram is caused by electrolyte disturbance other than acute myocardial infarction.
Hsieh
Ming-Hsiung
MH
Division of Cardiovascular Medicine, Taipei Medical University-Wan Fang Hospital, Taipei, Taiwan, ROC. td7279@ms25.hinet.net
Cheng
Choun-Yi
CY
Chan
Paul
P
Tai
Ching-Tai
CT
Chen
Shih-Ann
SA
D000200:Action Potentials / Q000502:physiology*; D000368:Aged; D000369:Aged, 80 and over; D003937:Diagnosis, Differential; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D006947:Hyperkalemia / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology; D006996:Hypocalcemia / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology; D008297:Male; D009203:Myocardial Infarction / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology*; D014882:Water-Electrolyte Balance / Q000502:physiology