Functional Status Trajectory and Survival for Adult Patients Undergoing Heart Transplantation

Area of Science:

• Cardiology
• Transplantation Medicine
• Health Outcomes Research

Background:

• Heart transplantation significantly improves survival and quality of life for end-stage heart disease patients.
• Understanding functional status post-transplant is crucial for patient management and outcome prediction.

Purpose of the Study:

• To identify predictors of functional status improvement after heart transplant.
• To examine the association between functional status trajectory and patient survival.

Main Methods:

• Retrospective cohort study of 34,009 US adults undergoing heart transplant (2006-2021).
• Functional status assessed using the Karnofsky Performance Scale (KPS).
• Statistical analyses included linear regression for KPS predictors and Cox models for survival analysis.

Main Results:

• Mean KPS improved from 45.6% at transplant to 89.2% at 5 years.
• Numerous clinical and social factors predicted KPS trajectory.
• KPS trajectory, both pre- and post-transplant, independently predicted survival.
• A significant KPS decrease in the first year post-transplant was associated with substantially higher mortality.

Conclusions:

• Functional status improvement, as measured by KPS, is a vital outcome post-heart transplant and a predictor of survival.
• While most patients achieve good functional status, targeted interventions may enhance outcomes for high-risk individuals.