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Left Main Coronary Occlusion During TAVI Procedure: Calcium Embolization Matters
Rajesh Vijayvergiya1, Basant Kumar1, Arghadip Bose1
1Department of Cardiology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Insights
Acute coronary occlusion during transcatheter aortic valve implantation (TAVI) is a rare but serious complication. This case highlights successful emergent percutaneous coronary intervention (PCI) for left main bifurcation occlusion in a low-risk TAVI patient.
Area of Science:
- Cardiology
- Interventional Cardiology
- Cardiac Surgery
Background:
- Acute coronary occlusion is a rare but life-threatening complication during transcatheter aortic valve implantation (TAVI).
- Pre-procedural multidetector computed tomography (MDCT) assesses anatomical risks, but occlusion can still occur due to emboli or other mechanisms.
- Sudden hemodynamic collapse during TAVI necessitates prompt recognition and intervention for potential coronary occlusion.
Purpose of the Study:
- To report a case of acute coronary occlusion during TAVI in a patient with seemingly low anatomical risk.
- To describe the successful management of this complication using emergent percutaneous coronary intervention (PCI).
- To emphasize the importance of prompt diagnosis and intervention for coronary occlusion during TAVI.
Main Methods:
- A case report detailing a TAVI procedure complicated by acute coronary occlusion.
- Diagnostic workup including hemodynamic monitoring and coronary angiography.
- Therapeutic intervention with emergent left main (LM) bifurcation PCI.
Main Results:
- The patient experienced sudden hemodynamic collapse during TAVI, raising suspicion for coronary occlusion.
- Coronary angiography revealed acute occlusion at the left main bifurcation.
- Successful salvage with emergent LM bifurcation PCI was achieved, stabilizing the patient.
Conclusions:
- Acute coronary occlusion can occur during TAVI even in patients without apparent high-risk anatomical features.
- Prompt recognition and emergent PCI, particularly for left main bifurcation involvement, are critical for patient survival.
- This case underscores the need for vigilance and preparedness for coronary complications during TAVI procedures.
Abstract:
Acute coronary occlusion during transcatheter aortic valve implantation (TAVI) is an unwarranted complication associated with high mortality. The current TAVI practices recommend a multidetector computed tomography (MDCT) evaluation of the aortic valve, the left ventricular outflow tract, and the aortic root to determine the conventional risk factors for coronary obstruction like low-lying coronary ostia and narrow sinuses of Valsalva, mandating prophylactic coronary protection or native valve leaflet modification in high-risk patients. Despite optimal anatomy, acute coronary occlusion can still occur due to multiple mechanisms, one of which is coronary embolism due to thrombus, calcium, or native aortic valve fragments. A sudden hemodynamic collapse during a TAVI procedure in the absence of apparent causes always raises the suspicion of coronary occlusion, which requires a prompt percutaneous coronary intervention (PCI) to save the patient's life. This report describes a case of acute coronary occlusion during TAVI in a seemingly low-risk patient salvaged with an emergent left main (LM) bifurcation PCI.
