Related Experiment Videos
Coronary oxygen persufflation for long-term myocardial protection
F Kuhn-Régnier1, J H Fischer, S Jeschkeit
1Department of Cardiothoracic Surgery and Institute for Experimental Medicine, University of Cologne, Germany.
The Thoracic and Cardiovascular Surgeon
|November 20, 1998
Summary
Continuous Coronary Oxygen Persufflation (COP) combined with cardioplegic arrest significantly improves heart transplant recovery. This technique enhances cardiac function and myocardial ATP levels after 14-hour preservation, offering a promising complement to current cold storage methods.
Area of Science:
- Cardiology
- Transplantation Medicine
- Biomedical Engineering
Background:
- Myocardial ischemia duration is a critical limiting factor in human heart transplantation.
- Current preservation methods face challenges in extending ischemia tolerance.
- Gaseous oxygen persufflation offers a potential strategy to mitigate ischemic injury.
Purpose of the Study:
- To evaluate the efficacy of continuous Coronary Oxygen Persufflation (COP) combined with cardioplegic arrest in prolonging myocardial preservation.
- To assess the impact of COP on cardiac functional recovery after orthotopic heart transplantation following prolonged hypothermic storage.
- To compare the cardioprotective effects of different cardioplegic solutions with and without COP.
Main Methods:
- Orthotopic pig heart transplantation after 14-hour hypothermic preservation.
- Comparison of three cardioplegic solutions: Euro-Flush glutathion (EFG), University of Wisconsin (UW), and modified Bretschneider HTK (mHTK).
- Application of continuous Coronary Oxygen Persufflation (COP) with gaseous oxygen to the mHTK group during storage (mHTK+COP).
- Assessment of cardiac function through hemodynamic measurements (dp/dtmax, CO, preload recruitable stroke work) and myocardial ATP levels post-reperfusion.
Main Results:
- mHTK+COP hearts demonstrated significantly improved cardiac functional recovery compared to simple cold storage.
- Hemodynamics (dp/dtmax, CO) were significantly better in the mHTK+COP group post-reperfusion.
- Left-ventricular myocardial ATP levels were significantly higher in the mHTK+COP group compared to EFG and UW groups.
- No increase in CK-MB as a percentage of CK was observed during postoperative reperfusion across all groups.
Conclusions:
- Continuous Coronary Oxygen Persufflation (COP) is an effective adjunct to cold storage techniques in heart transplantation.
- COP significantly enhances myocardial protection and functional recovery following prolonged ischemic periods.
- Further research on long-term survival and endothelial function is necessary before clinical application.