pseudonormalization
Pronunciation: SOO-doe-nor-mal-ih-ZAY-shun
The temporary return of inverted T waves to upright appearance during acute ischemia, masking the severity of ongoing coronary occlusion.
Full Definition
Pseudonormalization occurs when previously inverted T waves become upright during an episode of acute ischemia, creating a misleading appearance of improvement on ECG. This phenomenon represents acute transmural ischemia superimposed on chronic ischemic changes, effectively canceling out the baseline T wave inversion. Recognition is crucial because the apparently 'normal' ECG may mask ongoing acute coronary occlusion requiring immediate intervention, and comparison with prior ECGs is essential for proper interpretation.
Usage
Usage note: Always require comparison with prior ECGs when documenting this finding.
In Context
- "Comparison with the baseline ECG revealed pseudonormalization of previously inverted lateral T waves." — ECG interpretation report
- "The upright T waves represented pseudonormalization rather than resolution of ischemia." — Cardiology consultation