%0 Journal Article
%T Autonomic Function in Individuals with Slow Heart Rate Response following an Exercise Stress Test
%A Itai Goldfarb
%A Kobi Serr
%A Shlomo Segev
%A Joseph Shemesh
%A Ilan Goldenberg
%A Mickey Scheinowitz
%J World Journal of Cardiovascular Diseases
%P 287-296
%@ 2164-5337
%D 2022
%I Scientific Research Publishing
%R 10.4236/wjcd.2022.126028
%X <strong>Objective:</strong><span style=\"white-space:normal;\"><span style=\"font-family:;\" \"=\"\"> To examine the autonomic function using HRV measures in apparently healthy individuals undergoing exercise stress test (EST) and demonstrating slow HRR response. <b>Methods: </b>HRV was measured with 12 lead ECGs during graded EST and analyzed via a post-processing method. Autonomic function was determined by Power Spectral Analysis of the very low frequency (VLF), low frequency (LF), high frequency (HF), and the ratio of LF/HF. We correlated HRV indices with resting, exercise, and recovery data. <b>Results:</b> No differences were found in anthropometric measurements, peak EST HR, and METS between individuals with slow HRR (below 18 b/min) compared with controls (HRR &gt; 18 b/min). Only the VLF component of the HRV indices was statistically different (p = 0.03) at one-minute post-exercise compared with controls. Additionally, a significant correlation between HRR and resting LF and HF indices was found in the individuals with slow HRR but not in the controls. <b>Conclusion</b>: In apparently healthy individuals with slow HRR post-EST, autonomic function did not demonstrate any differences at any phase of the EST, including at one minute of recovery. However, a significant correlation was found between resting LF and HF powers and HRR in individuals with slow vagal reactivation post-exercise. The clinical and prognostic implications of such observation deserve further investigation.</span></span>
%K Heart Rate
%K Heart Rate Recovery
%K Heart Rate Variability
%K Exercise Stress Test
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=117784