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Anaesthetic considerations for noncoronary surgery on a perfused beating heart under cardiopulmonary bypass
Akhlesh S Tomar1, Amit Banerjee, Kunal Hazari
1Department of Anaesthesiology, Govind Ballabh Pant Hospital, New Delhi, India.
Insights
Performing open heart surgery on a beating heart for non-coronary conditions avoids cardioplegic myocardial injury. This technique under cardiopulmonary bypass offers a safe and effective alternative to traditional methods.
Area of Science:
- Cardiac Surgery
- Anesthesiology
- Cardiopulmonary Bypass
Background:
- Myocardial revascularization on a beating heart reduces cardioplegic injury.
- Non-coronary open heart surgery traditionally involves cardioplegic arrest.
- Beating heart surgery offers potential myocardial protection.
Purpose of the Study:
- To evaluate the anesthetic management and outcomes of non-coronary open heart surgery performed on a beating heart under cardiopulmonary bypass.
- To assess the feasibility and safety of maintaining myocardial function during cardiopulmonary bypass for non-coronary procedures.
Main Methods:
- Thirty-three patients (aged 14-56) underwent non-coronary open heart surgery on a beating heart with cardiopulmonary bypass.
- Procedures included mitral valvotomy, mitral valve replacement, atrial septal defect repair, and left atrial myxoma removal.
- Anesthetic management focused on maintaining the beating state via electrolyte balance, perfusion pressure, and ST monitoring; trans-esophageal echocardiography was used.
Main Results:
- All patients were successfully weaned from cardiopulmonary bypass without defibrillation or significant inotropic support.
- No operative mortality was observed.
- Continuous coronary perfusion via aortic root needle maintained myocardial function during aortic cross-clamping.
Conclusions:
- Open heart surgery on a beating heart for non-coronary conditions is a viable and reproducible option.
- This approach effectively protects the myocardium from the adverse effects of cardioplegic arrest.
- Careful anesthetic management is crucial for successful outcomes in beating heart non-coronary surgery.
Abstract:
Myocardial revascularisation on a beating heart with or without cardiopulmonary bypass has significantly reduced the incidence of cardioplegic myocardial injury. With this advantage in view, noncoronary open heart surgery was performed on a beating heart under cardiopulmonary bypass. We discuss the anaesthetic management of such cases. Thirty-three patients aged 14-56 years underwent open heart surgery on a perfused beating heart. Eleven of them underwent open mitral valvotomy, eighteen underwent mitral valve replacement, repair of atrial septal defect was performed in 3 patients and one had removal of left atrial myxoma. Cardiopulmonary bypass was instituted with aortic and bicaval cannulation. At normothermia, aorta was cross-clamped and continuous coronary perfusion was maintained through an aortic root needle at a rate of 4-6 mL/Kg/minute facilitating a beating heart. Trans-oesophageal echocardiography was routinely deployed. Anaesthetic considerations were focused towards the maintenance of the beating state of the heart, that included, strict control of electrolyte balance, maintenance of adequate perfusion pressure and ST segment monitoring. All the patients could be weaned off cardiopulmonary bypass without defibrillation or significant inotropic support. There was no operative mortality. Open heart surgery on a beating heart for non-coronary cardiac conditions appears to be a good and reproducible option to protect the myocardium from deleterious effects of cardioplegic arrest.
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