PREVALENCE AND PROGNOSIS FOR SYNCOPE AMONG …
PREVALENCE AND PROGNOSIS FOR SYNCOPE AMONG CARDIAC TRANSPLANT RECIPIENTS
M.A. Caccamo, D.J. Cantillon, E.Z. Gorodeski, W. Saliba, B.L. Wilkoff, R.C. Starling
Cleveland Clinic Foundation, Cleveland, OH, USA
Objectives: To identify the prevalence and prognosis of syncope among cardiac transplant recipients
Background: Syncope occurs in 3-10% of cardiac transplant recipients. Limited outcomes data exist making evidence-based management difficult. One small published series with unadjusted outcomes suggested syncope in the setting of untreated bradyarrhythmia (BA) carried increased mortality risk.
Methods: We prospectively evaluated 1,307 heart transplant recipients between 1985 - 2007 in the Cleveland Clinic registry followed by structured follow-up visits and biopsy. The primary endpoint was all-cause mortality or re-transplant.
Results: Recipients age 50 ± 15 yrs (donor age 33 ± 14 yrs) were followed 82 ± 59 event-free months. Syncope occurred in 84 pts (6.4%) at mean 58.1 ± 53.0 months post-transplant with a mean of 3.4 ± 10.7 events per patient over the follow-up period. The mean left ventricular ejection fraction was 51.9 ± 10.4%. No differences in baseline characteristics between those with and without syncope. 10 patients (11.9%) had documented BA with pacemaker (PPM), 1 patient (1.2%) had BA without PPM and 73 patients (86.9%) had syncope without BA or PPM. Multivariate survival analysis adjusting for donor/recipient age, transplant coronary artery disease, donor heart ischemic time, United Network for Organ Sharing status and Left Ventricular Assist Device bridge demonstrated no significant increase in mortality associated with a syncopal event
(HR 1.20 [CI 0.84-1.72]; p=0.315)
Conclusions: Syncope is not strongly associated with increased mortality in our post-cardiac transplant population where documented bradyarrhythmias were appropriately treated with pacing.
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