Volume : VIII, Issue : XII, December - 2018

Heart rate variability in vasovagal syncope during head-up tilt test

Shavana R Rana, Anirban T Bhattacharya, Bikalp Thapa, Anuj Chawla

Abstract :

 

Background: HRV analysis of vasovagal syncope (VVS) patients have shown variable results. Objective was to study the behavior of cardiac autonomic activity during HUTT and also see if VVS could be predicted during tilt. Materials and method: Retrospective HRV analysis of patients presenting with syncope and undergoing HUTT (21 HUTT positives and 21 HUTT negatives) during 5 minutes each of resting position, post tilt and before end of test or syncope/presyncope. Results: Resting values were comparable. HUTT positives showed a significant rise in LF and a decrease in HF throughout tilt. SDNN and total power decreased throughout tilt from resting position in HUTT negatives only. Discussion: HUTT positive VVS showed increased sympathetic activity at the occurrence of syncope/pre–syncope and incomplete withdrawal of parasympathetic activity during tilt. These findings support the empty ventricle theory. Significant rise in LF and decrease in HF in HUTT positives during tilt may predict syncope.

Keywords :

Article: Download PDF   DOI : 10.36106/ijar  

Cite This Article:

Heart rate variability in vasovagal syncope during head–up tilt test , Shavana R Rana, Anirban T Bhattacharya, Bikalp Thapa, Anuj Chawla , INDIAN JOURNAL OF APPLIED RESEARCH : Volume-8|Issue-12| December-2018

Number of Downloads : 278

References :