Long-term outcome of patients with atrial myxoma after surgical intervention: analysis of 403 cases.

OBJECTIVE: To assess long-term survival and late cardiovascular events in patients with atrial myxoma after surgical intervention.

METHODS: Retrospective analysis of 403 patients undergoing resection of atrial myxoma from January 2002 to December 2016 was conducted with a median follow-up period of 4.5 (range: 0.5-15) years.

RESULTS: The cross-clamp time and cardiopulmonary bypass times were 41.1 ± 21.4 and 65.2 ± 27.3 min, respectively. A diagnosis of myxoma was histopathologically confirmed in all cases. The early in-hospital mortality rate was 0.7% ( n = 3). During the follow-up period, tumor recurrence occurred in six patients and cerebral infarction in nine. There were 48 (11.9%) patients with late onset atrial fibrillation (AF). By multivariate analysis, age (HR = 1.05, 95% CI: 1.02-1.09, P < 0.001), left atrial diameter (HR = 1.23, 95% CI: 1.08-1.36, P = 0.012), and mitral valve surgery (HR = 1.17, 95% CI: 1.05-1.29, P = 0.027) were independent predictors of late onset AF. Twenty-one (5.2%) patients died during the follow-up period. Advanced age (HR = 1.07, 95% CI: 1.04-1.10, P = 0.003) and multiple surgical procedures (HR = 1.18, 95% CI: 1.06-1.29, P = 0.012) were significantly associated with overall mortality.

CONCLUSIONS: Atrial myxoma can be resected with good long-term survival. Late onset AF is common after surgery in patients with atrial myxoma. Advanced age, left atrial diameter, and mitral valve surgery were independent predictors of outcomes.