Higher left ventricular diastolic dysfunction (E/e') independently predicted atrial fibrillation recurrence after catheter ablation in hypertrophic cardiomyopathy (HR 1.16; 95% CI 1.01-1.37; P=0.03).
Cohort (n=22)
Does left ventricular diastolic dysfunction (measured by E/e') predict atrial fibrillation recurrence after radiofrequency catheter ablation in patients with hypertrophic cardiomyopathy?
In patients with hypertrophic cardiomyopathy undergoing catheter ablation for atrial fibrillation, left ventricular diastolic dysfunction (higher E/e') is an independent predictor of AF recurrence.
Effect estimate: HR 1.16 (95% CI 1.01-1.37)
p-value: p=0.03
BACKGROUND: The relationship between outcome of radiofrequency catheter ablation (RFCA) for atrial fibrillation (AF) and the severity of left ventricular (LV) diastolic dysfunction in patients with hypertrophic cardiomyopathy (HCM) remains unknown. METHODS AND RESULTS: Twenty-two HCM patients (12 female, aged 65 ± 11 years) with paroxysmal (n=5; 23%) or persistent (n=17; 77%) AF were enrolled. LV diastolic function was evaluated according to the ratio of the mitral inflow early filling velocity to the velocity of the early medial mitral annular ascent (E/e') measured on pulsed wave and tissue Doppler assessments in all patients. Pulmonary vein isolation was performed in all patients. A second procedure was performed in 3 patients. During a follow-up of 21 ± 12 months, sinus rhythm was maintained in 13 of 22 patients (59%). E/e' was significantly higher in the patients with AF recurrence than in those without (18 ± 7 vs. 11 ± 3; P<0.01). On Kaplan-Meier analysis the prevalence of AF recurrence was significantly higher in patients with E/e' ≥ 15 (n=6) than in those with E/e' <15 (n=16; P<0.01). On multivariate Cox regression analysis the only significant and independent predictor for AF recurrence was E/e' (hazard ratio, 1.16; 95% confidence interval: 1.01-1.37, P=0.03). CONCLUSIONS: LV diastolic dysfunction evaluated using E/e' was associated with difficulty of rhythm control after RFCA in patients with HCM and AF.
Okamatsu et al. (Fri,) conducted a cohort in Hypertrophic cardiomyopathy with atrial fibrillation (n=22). Radiofrequency catheter ablation vs. E/e' < 15 was evaluated on Atrial fibrillation recurrence (HR 1.16, 95% CI 1.01-1.37, p=0.03). Higher left ventricular diastolic dysfunction (E/e') independently predicted atrial fibrillation recurrence after catheter ablation in hypertrophic cardiomyopathy (HR 1.16; 95% CI 1.01-1.37; P=0.03).