[Angina-induced marked, positive U-waves in leads V1-3]
János Tomcsányi1, Tamás Frész1, Marcell Csákányi1
11 Betegápoló Irgalmasrend Budai Irgalmasrendi Kórháza, Kardiológia Budapest, Árpád fejedelem u. 7. II. em., 1023 Magyarország.
Orvosi Hetilap
|August 2, 2026
Summary
U-wave polarity changes during angina can indicate myocardial ischemia, potentially being the sole sign. Positive U-waves in leads V1-4 during angina suggest posterobasal ischemia and critical coronary artery stenosis.
Area of Science:
- Cardiology
- Electrocardiography
- Ischemic Heart Disease
Background:
- U-wave changes during angina are frequently overlooked.
- Altered U-wave polarity can be the only indicator of myocardial ischemia.
Purpose of the Study:
- To highlight the significance of U-wave polarity changes in diagnosing myocardial ischemia.
- To correlate specific U-wave changes with coronary artery stenosis.
Main Methods:
- Case study presentation.
- Electrocardiographic analysis during angina episodes.
Main Results:
- Positive U-wave in leads V1-4 during angina indicates posterobasal ischemia.
- This finding suggests critical stenosis in the circumflex (CX) or right coronary artery (RCA).
Conclusions:
- U-wave polarity changes are a crucial, often unrecognized, sign of myocardial ischemia.
- Monitoring U-waves can aid in identifying critical coronary artery lesions.
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