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Updated: Aug 2, 2026
08:30
Murine Isolated Heart Model of Myocardial Stunning Associated with Cardioplegic Arrest
Published on: August 6, 2015
Myocardial oedema and ventricular function after cardioplegia with added mannitol
R Goto1, H Tearle, D J Steward
1Department of Anaesthesia, B.C. Children's Hospital, Vancouver.
Canadian Journal of Anaesthesia = Journal Canadien D'Anesthesie
|January 1, 1991
Summary
Mannitol reduces myocardial edema after heart surgery. Adding mannitol to cardioplegic solutions improved heart function and reduced water content in rabbit hearts, enhancing myocardial protection during cardiac arrest.
Area of Science:
- Cardiology
- Cardiovascular Surgery
- Physiology
Background:
- Myocardial edema can impair heart function after open-heart surgery.
- Cardioplegia-induced cardiac arrest is a common cause of this edema.
- Understanding edema formation is crucial for improving post-operative outcomes.
Purpose of the Study:
- To investigate the rate of myocardial edema during crystalloid cardioplegia.
- To examine the relationship between edema and ventricular function post-reperfusion.
- To evaluate the protective effect of adding mannitol to cardioplegic solutions.
Main Methods:
- Utilized an isolated rabbit heart model.
- Measured myocardial tissue water content during cardioplegic arrest.
- Compared a standard crystalloid cardioplegic solution with one supplemented with mannitol.
Main Results:
- Myocardial water content increased during cardioplegic arrest.
- Pre-reperfusion water content inversely correlated with post-reperfusion ventricular function.
- The mannitol group showed reduced RV water content and improved LV dP/dtmax post-reperfusion.
Conclusions:
- Mannitol addition to cardioplegic solutions mitigates myocardial edema.
- Mannitol enhances myocardial protection during cardioplegic arrest.
- This suggests a potential strategy to improve outcomes after open-heart surgery.
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