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Different patterns of hemodynamic abnormalities in patients with ischemic heart disease compared with patients with
Insights
This study differentiated ischemic heart disease (IHD) from congestive cardiomyopathy (COCM) using noninvasive tests. Exercise capacity combined with pre-ejection period/left ventricular ejection time best distinguished these conditions.
Area of Science:
- Cardiology
- Cardiovascular Physiology
- Diagnostic Imaging
Background:
- Differentiating ischemic heart disease (IHD) from congestive cardiomyopathy (COCM) is crucial for effective treatment.
- Both conditions can present with similar symptoms like chest pain and heart failure, necessitating precise diagnostic tools.
Purpose of the Study:
- To evaluate the effectiveness of various noninvasive parameters in distinguishing between IHD and COCM.
- To identify the optimal combination of noninvasive tests for differentiating these two heart conditions.
Main Methods:
- Exercise testing, systolic time intervals, apexcardiography, and cardiac catheterization with coronary arteriography were performed on 48 patients.
- Patients were categorized into IHD (n=23) and COCM (n=19) groups.
- Analysis focused on parameters like ejection fraction (EF), pre-ejection period index (PEPI), PEP/LVET, and SBP/LVESVI.
Main Results:
- Several parameters effectively separated IHD and COCM patient groups.
- Pre-ejection period/left ventricular ejection time (PEP/LVET) and exercise capacity showed the best discriminatory power when used together.
- No single noninvasive parameter adequately characterized circulatory function due to individual patient variations.
Conclusions:
- Exercise capacity combined with PEP/LVET offers a robust method for differentiating IHD from COCM.
- Noninvasive testing can provide valuable insights into distinguishing between these two heart diseases.
- Comprehensive assessment is necessary, as individual physiological differences impact parameter interpretation.
Abstract:
48 patients with chest pain or unexplained heart failure were examined with exercise test, systolic time intervals, apexcardiogram and left- and right-sided heart catheterization including coronary arteriography. The 23 patients with ischemic heart disease (IHD) and 19 patients with congestive cardiomyopathy (COCM) could as groups be separated by several of the parameters. Two major patterns of change were present when using the whole range of parameters, probably reflecting that the heart and circulation had compensated for left ventricular dysfunction in different ways in IHD and COCM. Comparing patients with the same ejection fraction (EF), preejection-period index (PEPI) pre-ejection-period/left ventricular ejection time (PEP/LVET) and systolic blood pressure/left ventricular end systolic volume index (SBP/LVESVI), were all more abnormal in patients with COCM than with IHD at most EF levels. The best separation between the diseases was obtained using exercise capacity in combination with PEP/LVET. The correlations between invasive and noninvasive parameters underlined that no single parameter can satisfactorily characterize the circulatory function in patients with individual differences in preload, afterload, pulse rate, cardiac volumes, compliance and contractility. No or poor correlations were found between exercise capacity and the different function parameters used.