Effect of temperature of cardioplegic solution.

Abstract

This study tests the hypothesis that the efficacy of cardioplegic solution depends upon its chemical constituents rather than on its temperature alone. A standard preparation of right heart bypass in the dog was utilized. Left ventricular function curves were inscribed before and after 1 hour of aortic cross-clamping. No deterioration in function was observed in nonischemic control hearts or in hearts protected with cardioplegic solution consisting of potassium chloride (25 mEq. per liter) and mannitol (12.5 Gm. per liter in 5 percent dextrose and 0.2 percent saline at either 4 degrees C or 28 degrees C. Severe myocardial depression was observed in hearts rendered ischemic for 1 hour at 28 degrees C. without protection and also in hearts perfused with 5 percent dextrose and 0.2 percent saline at 28 degrees C. without the potassium chloride and mannitol. The evidence from this study indicates that cardioplegic solution exerts a protective effect beyond that which is afforded by hypothermia.

• Authors: D M Behrendt, K E Jochim
• Journal: The Journal of thoracic and cardiovascular surgery (J Thorac Cardiovasc Surg) Vol. 76 Issue 3 Pg. 353-7 (Sep 1978) ISSN: 0022-5223 [Print] United States
• PMID: 682667 (Publication Type: Journal Article)

Chemical References

• Solutions
• Sodium Chloride
• Glucose

Topics

• Animals
• Cardiopulmonary Bypass
• Coronary Circulation
• Dogs
• Evaluation Studies as Topic
• Glucose
• Heart Arrest, Induced (methods)
• Hypothermia, Induced (methods)
• Sodium Chloride
• Solutions
• Temperature