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Post-Myocardial Infarction Heart Failure in Closed-chest Coronary Occlusion/Reperfusion Model in Göttingen Minipigs and Landrace Pigs
Published on: April 17, 2021
[Mechanical complications of myocardial infarction in elderly patients]
1Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
Abstract:
As mechanical complications after myocardial infarction in the elderly, we described the therapeutic strategies for postinfarction ventricular septal perforation (PVSP), ischemic cardiomyopathy (ICM), and ischemic mitral regurgitation (IMR). To improve operative results for PVSP in the elderly, it is important to maintain hemodynamics by cardiac support device such as intraaortic balloon pumping, and to perform prompt surgical intervention before cardiogenic shock and multiple organ failure. Infarct exclusion technique is a standard surgery for PVSP. Both ICM and IMR are common disease caused by severe cardiac ischemia and mitral valve (MV) function is related to left ventricular (LV) geometry. We consider total MV-LV geometrical repair by LV restoration surgery, MV repair, and coronary revascularization is essential to improve morphological abnormality in LV and MV even in the elderly. To maximize LV function, septal anterior ventricular exclusion (SAVE) technique for antero-septal myocardial ischemia, apex-sparing Batista operation for lateral ischemia, and undersized mitral annuluoplasty to improve LV sphericity are procedures of choice. However, it is still difficult to save elderly patients with very low cardiac function. Novel treatments such as regenerative medicine by angiogenic cytokines and/or cell transplantation, and advanced medical treatments are waited for this high-risk group.
Insights
Therapeutic strategies for elderly patients with mechanical complications after myocardial infarction, including postinfarction ventricular septal perforation (PVSP), ischemic cardiomyopathy (ICM), and ischemic mitral regurgitation (IMR), are discussed. Prompt intervention and LV-restoration surgery are key, but novel treatments are needed for high-risk cases.
Area of Science:
- Cardiovascular Surgery
- Geriatric Cardiology
- Myocardial Infarction Complications
Context:
- Mechanical complications post-myocardial infarction (MI) pose significant risks in elderly patients.
- Postinfarction ventricular septal perforation (PVSP), ischemic cardiomyopathy (ICM), and ischemic mitral regurgitation (IMR) are critical conditions requiring specialized management.
- Left ventricular (LV) geometry and mitral valve (MV) function are intricately linked in ischemic heart disease.
Purpose:
- To outline therapeutic strategies for managing mechanical complications of MI in the elderly.
- To emphasize the importance of hemodynamic support and timely surgical intervention for PVSP.
- To highlight the necessity of comprehensive LV and MV geometrical repair for ICM and IMR.
Summary:
- For PVSP in the elderly, maintaining hemodynamics with cardiac support devices and prompt surgery (e.g., infarct exclusion) before cardiogenic shock is crucial.
- For ICM and IMR, total MV-LV geometrical repair involving LV restoration surgery, MV repair, and coronary revascularization is essential.
- Surgical techniques like the septal anterior ventricular exclusion (SAVE) and apex-sparing Batista operation, along with mitral annuluoplasty, aim to maximize LV function and sphericity.
Impact:
- Improved operative outcomes for PVSP through early intervention and hemodynamic support.
- Enhanced LV function and morphological correction in ICM and IMR patients via integrated surgical approaches.
- Identifies the ongoing challenges in managing elderly patients with severely compromised cardiac function and underscores the need for advanced therapies like regenerative medicine.
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