How to increase the utilization of donor hearts?

Area of Science:

• Cardiology
• Transplantation Medicine
• Critical Care Medicine

Background:

• Cardiac transplantation is the optimal treatment for end-stage cardiomyopathy.
• Donor heart scarcity limits transplantation rates.
• Left ventricular (LV) systolic dysfunction and wall motion abnormalities lead to donor heart rejection.

Purpose of the Study:

• To review LV dysfunction in heart donors.
• To identify causes of reversible LV dysfunction.
• To propose strategies for increasing donor heart utilization.

Main Methods:

• Review of existing literature on LV dysfunction in heart donors.
• Analysis of the role of neurogenic stunned myocardium.
• Evaluation of catecholamine effects on LV function.

Main Results:

• A significant proportion of LV dysfunction in donors is reversible, caused by neurogenic stunned myocardium.
• Excess catecholamines, common in brain-dead donors, trigger this reversible dysfunction.
• Recovery of LV function is possible with time and management of catecholamine levels.

Conclusions:

• Neurogenic stunned myocardium is a key factor in donor heart rejection.
• Interventions to manage catecholamines and allow recovery can improve donor heart suitability.
• Strategies focusing on reversible LV dysfunction can increase the number of viable donor hearts for transplantation.