Related Experiment Video
Updated: Oct 2, 2026

Autonomic Function Following Concussion in Youth Athletes: An Exploration of Heart Rate Variability Using 24-hour Recording Methodology
Published on: September 21, 2018
[Heart rate variability in the elderly with syncope or falls of uncertain origin]
1Dept. of Geriatric Medicine and Neufeld Institute of Cardiology, Sheba Medical Center, Tel Hashomer.
Abstract:
Presyncope, syncope and falls in undetermined circumstances are frequent among the elderly. They may be caused by orthostatic hypotension secondary to autonomic insufficiency. Tilt-tests and determination of catecholamines in serum and urine may establish the diagnosis, but often may not be feasible in these patients. A simple, indirect, noninvasive technique to assess autonomic insufficiency is analysis of heart rate variability during Holter-monitoring. We present 5 cases in which it proved useful in the investigation of spells of unconsciousness.
Related Concept Videos
Decreased pulse rate
There are specific risk factors that can elevate the likelihood of developing bradycardia. Advanced age is a significant factor, with bradycardia...
Pulse rhythm
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac muscle...
Disturbances in Heart Rhythm
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
Dysrhythmias II: Classification of Tachyarrhythmias
Dysrhythmias III: Characteristics of Dysrhythmias
Dysrhythmias V: Evaluating Dysrhythmias

