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[Left anterior hemiblock induced by exertion, caused by diagonal arterial stenosis: apropos of a case]
H R Malaterre1, L Letallec, P Thomas
1CHU Conception, Marseille.
Insights
Exercise-induced left anterior hemiblock and ST depression, indicative of ischemia, resolved after angioplasty for severe diagonal artery stenosis. This case highlights the link between coronary artery disease and conduction abnormalities.
Area of Science:
- Cardiology
- Electrophysiology
- Ischemic Heart Disease
Background:
- Exercise stress testing is a common diagnostic tool for detecting exercise-induced myocardial ischemia.
- Conduction abnormalities, such as left anterior hemiblock, can sometimes be provoked by exertion.
Observation:
- A patient presented with transient left anterior hemiblock and ST segment depression during exercise testing.
- These electrocardiographic changes reverted to normal during the recovery phase post-exercise.
Findings:
- Coronary angiography revealed severe stenosis in the diagonal artery, a major coronary vessel.
- Following successful angioplasty of the stenosed diagonal artery, the exercise-induced conduction defect did not recur.
Implications:
- The resolution of the conduction defect post-angioplasty strongly suggests an ischemic origin.
- This case underscores the importance of considering coronary artery disease in patients with exercise-induced conduction abnormalities.
Abstract:
The authors report the case of a patient who developed left anterior hemiblock and ST segment depression during exercise testing which regressed during the recovery period. Coronary angiography showed severe stenosis of the diagonal artery. This conduction defect did not recur after effective angioplasty of the stenosed artery, reflecting the ischaemic nature of this abnormality.