To identify alternative causes of ST-segment elevation in lead aVR in post-CABG patients, particularly focusing on extracoronary vascular lesions and their clinical implications.
Key Findings:
Left subclavian artery stenosis can cause ST elevation in lead aVR by limiting inflow to the LIMA graft, which is significant for post-CABG management.
Coronary-subclavian steal syndrome is an under-recognized complication in post-CABG patients, necessitating awareness among clinicians.
A significant inter-arm systolic blood pressure difference can indicate proximal inflow disease, serving as a diagnostic clue.
Interpretation:
This case highlights the need for thorough evaluation of extracoronary vascular lesions in post-CABG patients experiencing recurrent ischemia, even with patent grafts, emphasizing the importance of comprehensive diagnostic approaches.
Limitations:
The study is based on a single case, limiting generalizability and necessitating further research.
Quantitative flow data was not measured during the intervention, which could provide additional insights.
Conclusion:
Recognition and treatment of left subclavian artery stenosis can effectively resolve ischemic symptoms and ECG changes in post-CABG patients, underscoring the importance of evaluating extracoronary lesions.
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