Head-Up Tilt

Int Heart J. 2015;56(5):500-4. doi: 10.1536/ihj.15-039. Epub 2015 Sep 11.

Abstract

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Atrial Fibrillation* / complications
  • Atrial Fibrillation* / diagnosis
  • Atrial Fibrillation* / physiopathology
  • Atrial Fibrillation* / therapy
  • Autonomic Nervous System / physiopathology
  • Catheter Ablation / adverse effects*
  • Catheter Ablation / methods
  • Female
  • Humans
  • Male
  • Middle Aged
  • Predictive Value of Tests
  • Prognosis
  • Proportional Hazards Models
  • Recurrence
  • Reproducibility of Results
  • Risk Factors
  • Syncope, Vasovagal / complications
  • Syncope, Vasovagal / diagnosis*
  • Syncope, Vasovagal / physiopathology
  • Tilt-Table Test / methods*