Primary graft dysfunction: Long-term physical function outcomes among lung transplant recipients.

Area of Science:

• Cardiology
• Pulmonology
• Transplantation Medicine

Background:

• Primary graft dysfunction (PGD) in lung transplant recipients is linked to pulmonary and functional deficits.
• Long-term (1.5-year) cardiopulmonary exercise testing (CPET) data for adults with grade 3 PGD are not well-documented.
• Understanding functional outcomes post-PGD is crucial for patient recovery and management.

Purpose of the Study:

• To compare functional outcomes between lung transplant patients with and without grade 3 PGD.
• To evaluate results from CPET and six-minute walk tests (6MWD) in these patient groups.
• To assess the long-term impact of PGD on exercise capacity and functional status.

Main Methods:

• A cohort of 243 lung transplant recipients (2003-2010) was analyzed.
• 128 patients completed CPET and 6MWD between 12-18 months post-transplant.
• Grade 3 PGD at 72 hours post-transplant was the primary exposure, with secondary assessment of PGD within 72 hours.

Main Results:

• 32% of patients experienced PGD within 72 hours; 6% had grade 3 PGD at 72 hours.
• No significant differences in CPET or 6MWD were observed between groups with and without grade 3 PGD at 72 hours.
• Patients with grade 3 PGD showed similar functional outcomes, despite longer hospital stays and lower initial pulmonary function, with a notable exception of lower heart rate on CPET.

Conclusions:

• Lung transplant recipients with grade 3 PGD can achieve functional outcomes comparable to those without PGD.
• Long-term functional recovery is achievable even after severe primary graft dysfunction.
• CPET and 6MWD are valuable tools for assessing functional capacity post-lung transplantation and PGD.