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Multiple diagnostic measures elicited during the stress ballistocardiogram
Bibliotheca Cardiologica
|January 1, 1976
Summary
This study introduces a new method using acceleration ballistocardiography (Abcg) to detect subtle myocardial pumping dysfunction. By comparing resting measurements to stress-induced changes, it identifies patients with impaired heart function not apparent at rest.
Area of Science:
- Cardiology
- Biomedical Engineering
- Physiology
Background:
- Myocardial pumping dysfunction can be subtle and difficult to detect at rest.
- Non-invasive methods are needed to assess cardiac function under physiological stress.
Purpose of the Study:
- To evaluate the utility of acceleration ballistocardiography (Abcg) in detecting myocardial dysfunction.
- To establish a method for assessing cardiac function changes during acute blood pressure elevation.
Main Methods:
- Acceleration ballistocardiography (Abcg) was recorded in 22 subjects at rest and during isometric handgrip stress.
- Computer analysis of graphic waveforms (H/I slope, I/J slope, I-J amplitude) was performed.
- Ratios of stress to resting values were calculated to identify significant declines (≥10%).
Main Results:
- The Abcg method successfully identified patients with varying grades of myocardial pumping dysfunction.
- Changes in waveform parameters during stress, relative to rest, were indicative of impaired cardiac function.
- The use of each subject as their own control enhanced the method's sensitivity.
Conclusions:
- Acceleration ballistocardiography (Abcg) offers a sensitive approach to detect myocardial pumping dysfunction.
- This method can reveal cardiac impairments not evident during resting conditions.
- Abcg provides a valuable tool for assessing cardiac reserve and identifying early signs of heart dysfunction.