Related Experiment Video
Updated: Aug 12, 2026

Measuring Cardiac Autonomic Nervous System (ANS) Activity in Children
Published on: April 29, 2013
Changes in the impedance cardiogram occurring with change in posture in patients with heart disease
1St. Thomas' Hospital, London, U.K.
Abstract:
The response of the heart to changes in posture from supine through sitting to standing was recorded by impedance cardiography. The study comprised 22 normal subjects and 74 patients with a variety of heart diseases. The results demonstrate that in normal subjects acceleration of blood in systole decreased on sitting and standing. In subjects with impaired cardiac function this acceleration increased on sitting and standing from the supine position. This clear-cut difference in response provides a subtle method of detecting impaired function and in addition, provides a method of monitoring the effects of vasodilator or other treatment.
More Related Videos
10:21Evaluation of Hydration Status by Bioelectrical Impedance Vector Analysis in Patients with Ischemic Heart Disease Undergoing Exercise Stress Test
Published on: September 22, 2023
05:16Cutoff Value of Phase Angle by Bioelectrical Impedance Analysis at Admission as a Prognostic Factor in Patients with Acute Heart Failure
Published on: June 10, 2025
Related Concept Videos
Pulse rhythm
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac muscle...
Bode Plots Construction
Electrocardiogram
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and the T...
Imbalances in Cardiac Output
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
Cardiomyopathy II: Dilated Cardiomyopathy
Cardiomyopathy III: Hypertrophic Cardiomyopathy