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[Myocardial protection with cold blood potassium cardioplegia: experimental and clinical studies]
Insights
Cold blood potassium cardioplegia effectively protects the heart muscle during surgery. This method demonstrated excellent myocardial protection in both human heart operations and dog heart transplants, reducing risks associated with cardiac ischemia.
Area of Science:
- Cardiology
- Cardiac Surgery
- Cardiovascular Research
Context:
- Cold blood potassium cardioplegia is a technique used for myocardial protection during heart surgery.
- This study evaluated its efficacy in a clinical setting and through experimental models.
- The research was conducted at Kagoshima University between August 1978 and August 1981.
Purpose:
- To assess the effectiveness of cold blood potassium cardioplegia in protecting the heart muscle during cardiac operations.
- To compare the outcomes of congenital and acquired heart surgeries using this cardioplegia method.
- To experimentally validate the myocardial protective qualities of cold blood potassium cardioplegia.
Summary:
- A total of 181 patients underwent heart operations using cold blood potassium cardioplegia, with an 9.8% hospital mortality rate.
- Multivariate analysis showed no significant correlation between heart disease type and operative mortality or low output syndrome.
- Experimental orthotopic heart transplants in dogs demonstrated excellent cardiac contractility after 90 minutes of ischemia, with 16 grafts functioning without bypass.
Impact:
- Cold blood potassium cardioplegia offers significant myocardial protection, reducing complications during cardiac ischemia.
- The findings support the use of this technique for improved outcomes in heart surgery.
- This study provides valuable data for cardiac surgeons and researchers focusing on myocardial preservation strategies.
Abstract:
One hundred and eighty-one patients (101 men and 80 women) underwent 61 congenital and 120 acquired heart operations using cold blood potassium cardioplegia as the method of myocardial protection at Kagoshima University from August, 1978 to August, 1981. Hospital deaths occurred in 18 patients (9.8%), and 4 cases were late death (2.2%). Multivariate analysis revealed no significant relationship between type of heart disease and operative mortality or the occurrence of post-operative low output syndrome. To evaluate the superiority of cold blood cardioplegia for myocardial protection, we carried out 20 orthotopic heart transplants in dog; 16 transplanted grafts could maintain the circulation of recipient without cardiopulmonary bypass. Cardiac contractility following 90-minute ischemic time showed 97 to 100% of the control values without any inotropic drugs. These clinical and experimental findings suggest that cold blood potassium cardioplegia provides excellent myocardial protection during the ischemia of the heart.