Related Experiment Videos
Monophasic action potential-like electrocardiogram simulating acute myocardial infarction.
Ming-Hsiung Hsieh1, Choun-Yi Cheng, Paul Chan
1Division of Cardiovascular Medicine, Taipei Medical University-Wan Fang Hospital, Taipei, Taiwan, ROC. td7279@ms25.hinet.net
Summary
Monophasic action potential-like electrocardiograms mimicking heart attacks can be caused by electrolyte imbalances. Correcting potassium and calcium levels resolved these electrocardiogram abnormalities in two reported cases.
Area of Science:
- Cardiology
- Electrophysiology
- Internal Medicine
Background:
- Monophasic action potential-like electrocardiogram (ECG) patterns can mimic acute myocardial infarction (MI).
- These ECG changes have been previously associated with hyperkalemia.
Observation:
- Two cases presented with marked diffuse RS-T elevation, a pattern resembling monophasic action potentials.
- Case 1 exhibited hyperkalemia and hypocalcemia; Case 2 showed hypokalemia and hypocalcemia.
Findings:
- Electrocardiogram abnormalities normalized after electrolyte correction, specifically for potassium and calcium levels.
- The findings suggest electrolyte disturbances, not acute MI, as the cause of the observed ECG patterns.
Implications:
- This highlights the importance of assessing electrolyte levels in patients presenting with ECG findings suggestive of acute MI.
- Clinicians should consider electrolyte imbalances as a differential diagnosis for monophasic action potential-like ECG changes.
- Prompt correction of electrolyte abnormalities can reverse potentially misleading ECG findings.