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[Comparative studies of contractile heart function using impedance, echo-, radio- and apex cardiography]
Insights
This study compared impedance (ICG), ultrasonic (UCG), and radio (RCG) cardiography with calibrated apex cardiography (cACG) in 89 patients. ICG, UCG, and RCG showed significant correlations for heart function, unlike cACG.
Area of Science:
- Cardiology
- Biomedical Engineering
- Diagnostic Imaging
Background:
- Cardiovascular diseases require accurate diagnostic methods.
- Comparing non-invasive cardiac assessment techniques is crucial for clinical practice.
Purpose of the Study:
- To evaluate and compare the diagnostic capabilities of impedance cardiography (ICG), ultrasonic cardiography (UCG), radio cardiography (RCG), and calibrated apex cardiography (cACG).
- To identify correlations between these methods in assessing heart function during the auxotonic ejection phase.
Main Methods:
- Simultaneous measurements were performed on 89 participants, including healthy subjects, hypertensive patients, and coronary heart disease (CHD) patients.
- Utilized impedance (ICG), ultrasonic (UCG), radio (RCG), and calibrated apex cardiography (cACG) for data acquisition.
- Analyzed parameters related to heart function, particularly during the auxotonic ejection phase.
Main Results:
- Significant correlations were observed between ICG, UCG, and RCG parameters describing the auxotonic ejection phase.
- No significant correlations were found between ICG, UCG, RCG, and cACG.
- Hypertensive patients showed an increased A/S quotient in cACG compared to healthy individuals.
- CHD patients exhibited decreased auxotonic ejection phase parameters and increased isometric contraction time and A/S quotient via cACG.
Conclusions:
- ICG, UCG, and RCG are comparable methods for assessing heart function during the auxotonic ejection phase.
- cACG may offer complementary information, particularly in hypertensive and CHD patients.
- Further research is needed to fully elucidate the role of cACG in cardiovascular diagnostics.
Abstract:
89 patients (31 healthy subjects, 31 hypertensives, and 27 patients with coronary heart disease) were examined simultaneously by means of impedance (ICG)-, ultrasonic (UCG)-, radio (RCG)-, and calib. and diff. apex cardiography (cACG). There were found significant correlations between the ICG-, UCG-, and RCG-parameters, all describing the heart function in the auxotonic ejection phase. Whereas there were no significant correlations between the methods mentioned and the cACG. Of all investigated parameters in hypertensives only the quotient A/S of cACG is significantly increased compared with persons with healthy heart and circulation. In patients with coronary heart disease all the parameters of the auxotonic ejection phase are significantly decreased, the isometric contraction time and the quotient A/S are increased.