Mechanical circulatory support after heart transplantation.

Area of Science:

• Cardiology
• Transplantation Medicine
• Mechanical Circulatory Support

Background:

• Severe graft failure post-heart transplantation is a rare but catastrophic complication.
• The lifesaving potential of mechanical circulatory support (MCS) in such cases remains uncertain.

Purpose of the Study:

• To evaluate the effectiveness and outcomes of MCS in patients experiencing severe graft failure after heart transplantation.
• To identify factors influencing survival and complications associated with MCS use.

Main Methods:

• A retrospective analysis of 53 patients who required MCS after 1417 heart transplants between 1990 and 2009.
• Indications for MCS included acute rejection, biventricular failure, and respiratory failure.
• Initial support predominantly involved extracorporeal membrane oxygenation (ECMO).

Main Results:

• Overall survival at 1, 3, 7, and 30 days post-MCS initiation was 94%, 83%, 66%, and 43%, respectively.
• Patients with biventricular failure showed better survival than those with acute rejection (P=0.03).
• Complications, including stroke and infection, increased with MCS duration; 36% recovered, 9.4% were retransplanted, and 55% died on support.

Conclusions:

• MCS offers a potential for recovery or bridge to retransplantation in severe refractory heart failure post-transplant.
• Biventricular failure without rejection is a favorable indication for MCS.
• Early retransplantation should be considered for patients not showing graft recovery on MCS.