Transient ST elevation after transthoracic cardioversion in patients with hemodynamically unstable ventricular
L C Kok1, M A Mitchell, D E Haines
1Department of Internal Medicine, University of Virginia Health System, Charlottesville 22908, USA.
The American Journal of Cardiology
|April 12, 2000
Summary
Transient ST-segment elevation after resuscitation from ventricular tachyarrhythmias, not caused by ischemia, occurred in 15.4% of patients. This elevation showed no signs of myocardial infarction.
Area of Science:
- Cardiology
- Electrophysiology
- Critical Care Medicine
Background:
- ST-segment elevation typically indicates myocardial infarction.
- Arrhythmias like ventricular tachyarrhythmias can necessitate resuscitation.
- Understanding post-resuscitation ECG changes is crucial for accurate diagnosis.
Purpose of the Study:
- To investigate the occurrence and significance of ST-segment elevation following resuscitation from non-ischemic arrhythmias.
- To determine if ST-segment elevation after transthoracic shocks for ventricular tachyarrhythmias is linked to myocardial infarction.
Main Methods:
- Patients undergoing electrophysiologic studies received transthoracic shocks for unstable ventricular tachyarrhythmias.
- Electrocardiograms (ECGs) were monitored post-resuscitation.
- Clinical data was assessed for evidence of myocardial infarction.
Main Results:
- ST-segment elevation was observed in 15.4% of patients after resuscitation.
- The observed ST-segment elevation was transient.
- No clinical evidence of myocardial infarction was associated with the ST-segment elevation.
Conclusions:
- ST-segment elevation after resuscitation from arrhythmias unrelated to ischemia is a transient phenomenon.
- This ECG finding does not necessarily indicate acute myocardial infarction in this context.
- Further research may clarify the underlying mechanisms of transient ST-segment elevation post-arrhythmia resuscitation.
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