Importance of tachogram length and period of recording during noninvasive investigation of the autonomic nervous system

Abstract

[Extract] I read with great interest the recent work of Grant and colleagues1 that was recently published in the April 2011 issue. Of particular interest was that most 3-minute HRV measures were stable during supine rest but varied during the first 3-minutes of standing, most likely due to baroreflex mediated changes.2 Further, these authors highlighted the need for standardized recording times for supine and standing HRV.