Related Experiment Videos
[Evaluation of cardiac function by external polygraphic recordings. Comparison with angiography]
Archives Des Maladies Du Coeur Et Des Vaisseaux
|August 1, 1983
Summary
External polygraphic recordings, including systolic time intervals and apex cardiograms, showed no correlation with angiographic ejection fraction in patients. These non-invasive methods are unsuitable for routine clinical practice due to limitations in accuracy and practicality.
Area of Science:
- Cardiology
- Medical Technology
Background:
- Previous studies suggested correlations between external polygraphic recordings and angiographic ejection fraction.
- Assessing left ventricular function non-invasively is crucial for patient management.
Purpose of the Study:
- To evaluate the correlation between angiographic ejection fraction and external polygraphic indices.
- To determine the clinical utility of non-invasive methods for assessing cardiac function.
Main Methods:
- Compared angiographic ejection fraction with Weissler index (PEP/ET), normalized derivation of apex cardiogram (ds/dt/s), and apex cardiogram ejection fraction (EF apex) in 104 patients.
- Angiographic ejection fraction was calculated using left ventricular volumes derived from Dodge's method.
- External recordings were performed within 24 hours of angiography.
Main Results:
- No significant correlation was found between angiographic ejection fraction and any of the external indices.
- Systolic time intervals are highly sensitive to stress, posing challenges in hospital settings.
- High-quality apex cardiograms were obtained in only a small percentage of patients.
Conclusions:
- External polygraphic methods, including systolic time intervals and apex cardiograms, are not suitable for routine medical practice.
- Limitations include sensitivity to stress, difficulty in obtaining quality recordings, and challenges in data interpretation.
- Non-invasive assessment of ejection fraction using these methods lacks reliability compared to angiography.