Atrial fibrillation as a cause of left ventricular dysfunction after cardiac transplantation

Area of Science:

• Cardiology
• Transplantation Medicine
• Immunology

Background:

• Cardiac transplantation is a life-saving procedure for end-stage heart failure.
• Graft survival depends on managing complications like rejection and vasculopathy.
• Atrial fibrillation is a common arrhythmia, but its late onset post-transplant requires investigation.

Observation:

• Three cases of late-onset atrial fibrillation (AF) were observed years after cardiac transplantation.
• These patients presented with left ventricular systolic dysfunction.
• Importantly, cardiac allograft rejection and cardiac allograft vasculopathy were absent in these cases.

Findings:

• Late-onset atrial fibrillation can develop years after heart transplantation.
• Atrial fibrillation, even without rejection or vasculopathy, can lead to left ventricular systolic dysfunction.
• This suggests AF is a potential cause of cardiac allograft dysfunction.

Implications:

• Atrial fibrillation should be considered in the differential diagnosis of cardiac allograft failure post-transplant.
• Late-onset AF is not necessarily indicative of graft rejection.
• Aggressive management of AF, including rate control and rhythm restoration, may improve cardiac allograft function.