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Published on: April 25, 2014
A case of acute myocardial infarction due to left main coronary artery occlusion: Case report
Guochun Hu1, Di Wang, Taiyun Chu
1Sixth Affiliated Hospital of Kunming Medical University, Yuxi, Yunnan, China.
Insights
Drug-coated balloon angioplasty offers a life-saving option for acute myocardial infarction with cardiogenic shock due to left main occlusion, especially in resource-limited settings.
Area of Science:
- Cardiology
- Interventional Cardiology
- Acute Myocardial Infarction Management
Background:
- Left main coronary artery (LMCA) acute myocardial infarction (AMI) with cardiogenic shock (CS) has a high mortality rate (>80%) without prompt revascularization.
- Thrombolysis is often ineffective for LMCA-related AMI with CS, typically requiring percutaneous coronary intervention (PCI) with stenting and mechanical support.
Purpose of the Study:
- To report a unique case of LMCA-related AMI with CS successfully managed with drug-coated balloon (DCB)-only angioplasty.
- To highlight a viable alternative treatment strategy in resource-constrained environments during the COVID-19 pandemic.
Main Methods:
- A high-risk patient with LMCA-AMI and CS following failed thrombolysis was treated with DCB-only angioplasty.
- The intervention was performed without stenting, intravascular ultrasound (IVUS), or intra-aortic balloon pump due to pandemic-related resource limitations.
Main Results:
- Immediate TIMI 3 flow was achieved post-procedure.
- The patient's cardiogenic shock resolved gradually, and cardiac function normalized within six months.
- Follow-up IVUS confirmed no need for further intervention on the LMCA.
Conclusions:
- DCB-only angioplasty can be a viable, life-saving option for thrombotic left main occlusion in resource-limited settings where stent implantation is challenging.
- This approach offers a novel strategy for primary care hospitals managing critical emergencies like LMCA-AMI with CS.
Rationale:
Left main coronary artery (LMCA)-related acute myocardial infarction with cardiogenic shock (CS) carries >80% mortality without immediate revascularization.
Patient Concerns:
Thrombolysis often fails in such cases with LMCA and CS, necessitating salvage percutaneous coronary intervention, which typically requires stenting and mechanical circulatory support.
Diagnoses:
LMCA and CS.
Interventions:
We report a unique case successfully managed with drug-coated balloon (DCB)-only angioplasty amid resource constraints during the pandemic. This report presents a high-risk case of LMCA acute myocardial infarction with CS following unsuccessful TNK thrombolysis at the local hospital, successfully revascularized with DCB-only angioplasty without stenting, intravascular ultrasound (IVUS), intra-aortic balloon pump, or extracorporeal membrane oxygenation, because of pandemic-related medical resource limitations (IVUS/intra-aortic balloon pump unavailable) and extracorporeal membrane oxygenation not yet implemented at our hospital at that time.
Outcomes:
Post-procedural TIMI 3 flow was achieved immediately. Postoperatively, the patient's CS gradually resolved. After 1 month, IVUS performed at a tertiary hospital confirmed no need for further intervention for LMCA. Six months later, cardiac function had recovered to normal.
Lessons:
This case demonstrates that in resource-limited settings, when safe stent implantation cannot be guaranteed for thrombotic left main occlusion, the DCB-assisted rapid reperfusion strategy may represent a viable, life-saving option. It offers a new approach for primary care hospitals managing such critical emergencies.
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