Key result
A positive head-up tilt test was an independent predictor of atrial fibrillation recurrence after radiofrequency catheter ablation (HR 1.96; 95% CI 1.49-2.48; P<0.001).
Why the study?
Does a positive head-up tilt test predict atrial fibrillation recurrence in patients with paroxysmal atrial fibrillation undergoing radiofrequency catheter ablation?
Cohort (n=488)
Does a positive head-up tilt test predict atrial fibrillation recurrence in patients with paroxysmal atrial fibrillation undergoing radiofrequency catheter ablation?
Effect estimate: HR 1.96 (95% CI 1.49-2.48)
p-value: p=<0.001
A positive head-up tilt test identifies patients at increased risk of atrial fibrillation recurrence following radiofrequency catheter ablation for paroxysmal AF.
May warrant closer post-ablation surveillance in positive-tilt patients; leaves open utility for risk stratification in paroxysmal AF.
Autonomic dysfunction has been associated with paroxysmal atrial fibrillation (PAF). The head-up tilt test (HUTT) is an important diagnostic tool for autonomic dysfunction. The aim of this study was to examine atrial fibrillation recurrence after RFCA by performing HUTT. A total of 488 consecutive patients with PAF who underwent RFCA were prospectively enrolled. HUTT was positive in 154 (31.6%) patients after a mean follow-up of 22.7 ± 3.5 months, and 163 (33.4%) had a recurrence. HUTT positive was significantly higher in PAF patients with recurrence compared to those without (68 (41.7%) versus 86 (26.5%), P < 0.001). Multivariate Cox regression analysis revealed that HUTT positive (HR: 1.96; 95% CI: 1.49-2.48, P < 0.001), left atrial diameter (HR: 1.77; 95%CI: 1.15-2.11, P = 0.004), AF duration (HR: 1.27; 95%CI: 0.98-1.83, P = 0.014), and sleep apnea (HR: 1.02; 95%CI: 0.81-1.53, P = 0.032) were independent predictors of clinical recurrence after RFCA. The success rate of ablation was 70.4% in patients in the HUTT negative group compared with 58.4% in patients in the HUTT positive group (log-rank P = 0.006). Patients with a positive headup tilt test were at an increased risk of AF recurrence after catheter ablation. Our results suggest that HUTT was a significant predictor for AF recurrence after catheter ablation for PAF.
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Xu et al. (2015) conducted a cohort in Paroxysmal atrial fibrillation (PAF) (n=488). Positive head-up tilt test (HUTT) vs. Negative head-up tilt test was evaluated on Clinical recurrence of atrial fibrillation after RFCA (HR 1.96, 95% CI 1.49-2.48, p=<0.001). A positive head-up tilt test was an independent predictor of atrial fibrillation recurrence after radiofrequency catheter ablation (HR 1.96; 95% CI 1.49-2.48; P<0.001).
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