Severe Postoperative Bleeding after Heart Transplantation.

Area of Science:

• Cardiology
• Transplantation Surgery
• Critical Care Medicine

Background:

• Post-operative bleeding is a common concern in cardiac surgery.
• However, its incidence, risk factors, and consequences after heart transplantation are not well-defined.
• Severe bleeding complications significantly impact patient outcomes.

Purpose of the Study:

• To determine the incidence of severe bleeding complications in adult heart transplant recipients.
• To identify risk factors associated with severe post-operative bleeding.
• To evaluate the impact of severe bleeding on one-year mortality.

Main Methods:

• An observational study was conducted on adult heart transplant patients from 2015-2022 in two French centers.
• Severe bleeding was defined using a Universal Definition of Perioperative Bleeding (UDPB) score ≥ 3.
• Multivariable logistic and Cox regression models were used to identify risk factors and assess mortality impact.

Main Results:

• Out of 446 patients, 112 (25%) experienced severe bleeding.
• Risk factors included long-term mechanical cardiac support, lower preoperative hemoglobin, and longer cardiopulmonary bypass (CPB) duration.
• Severe bleeding was linked to increased one-year mortality (35% vs. 13%, adjusted HR 1.91).

Conclusions:

• The incidence of severe hemorrhagic complications after heart transplantation is high, especially in patients with mechanical circulatory support.
• These bleeding events significantly increase patient morbidity and mortality.
• Further research is needed to develop effective prevention strategies for post-heart transplant bleeding.