Early and late post-operative arrhythmias after surgical myectomy: 45 years of follow-up.

International Journal of Cardiology
Rohit K KharbandaAd J J C Bogers


The aims of this study are to investigate the incidence and determinants of post-operative atrial arrhythmias, conduction disorders and mortality in hypertrophic obstructive cardiomyopathy (HOCM) patients undergoing transaortic myectomy. This retrospective single-center study was conducted in 249 patients (median age 54 years [40-64], 42% female) undergoing transaortic myectomy. Post-operative atrial fibrillation (AF) was reported in 84 patients (33.7%), including 56 patients (22.5%) with de novo AF. Older age (HR = 1.027 (1.003-1.052), p = 0.029) and hypercholesterolemia (HR = 2.296 (1.091-4.832) p = 0.029) were independent predictors for de novo post-operative AF. Late post-operative AF and atrial flutter (AFL) occurred in 18.9% and 6.8% of the patients, respectively. De novo early post-operative AF increased the risk of late post-operative AF (HR = 3.138 (1.450-6.789), p = 0.004). Patients with a right bundle branch block had a higher risk of early-postoperative pacemaker implantation (p = 0.003, HR = 9.771 (2.195-43.505)). Higher age at time of surgery (HR = 1.053 (1.026-1.081), p < 0.001) was a predictor for late mortality (n = 47, 18.9%). Early and late post-operative AF, AFL and other SVTs are common sequelae after myect...Continue Reading


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