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[Regression of post-infarction parietal dyskinesia after percutaneous coronary angioplasty]
Insights
Recovery of heart wall motion after bypass surgery is rare, especially with negative improvement tests. This case shows paradoxical myocardial recovery following percutaneous coronary angioplasty for left anterior descending artery.
Area of Science:
- Cardiology
- Interventional Cardiology
- Cardiac Imaging
Background:
- Segmental wall motion abnormalities (SWMA) post-myocardial infarction (MI) often persist despite revascularization.
- Normalisation of SWMA after aorto-coronary bypass grafting (ACBG) is uncommon, particularly when dynamic tests like the trinitrin test are negative.
Observation:
- A 41-year-old male presented with anterior and septal wall dyskinesia 2.5 months post-anteroseptal MI.
- The patient experienced recurrent effort angina, and the trinitrin test did not indicate potential for improvement.
- Percutaneous coronary angioplasty (PCA) was performed to dilate the left anterior descending artery.
Findings:
- Post-PCA angiography at 6 months revealed near-complete normalisation of left ventricular contraction.
- This significant myocardial recovery occurred despite a negative trinitrin test, challenging established expectations.
Implications:
- This case highlights the potential for paradoxical myocardial recovery after revascularization of dyskinetic segments via PCA.
- It suggests that SWMA normalisation may occur even when pre-procedural dynamic tests predict limited improvement.
- The findings warrant further investigation into the mechanisms underlying such unexpected myocardial functional recovery.
Abstract:
Normalisation of abnormal segmental wall motion is rarely observed after myocardial revascularisation by aorto-coronary bypass when the territory revascularised is the site of post-transmural infarction dyskinesia. In particular, normalisation of segmental wall motion is extremely rare when dynamic tests designed to detect potential for improvement (trinitrin test and post-extrasystolic potentiation) are negative. We present the case of a 41 year old man who had anterior and septal wall dyskinesia 2.5 months after antero-septal infarction which was not improved by trinitrin. Dilatation of the left anterior descending artery by percutaneous coronary angioplasty was undertaken because of recurrent effort angina. Control angiography at 6 months showed almost complete normalisation of left ventricular contraction. This myocardial recovery is paradoxical because the trinitrin test did not show potential for improvement. The case illustrates the possibility of normalisation of segmental abnormalities of left ventricular contraction after revascularisation of the dyskinetic zone by percutaneous coronary angioplasty.