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[Relationship between left ventricular dysfunction studied by multigated radionuclide angiography and carotid
1Istituto di Clinica Medica, Università di Palermo.
Insights
This study links coronary heart disease with carotid artery disease using radionuclide angiography and Doppler tests. Combined heart and brain vessel assessments accurately classified patient groups, suggesting atherosclerosis is a single disease process.
Area of Science:
- Cardiology
- Neurology
- Vascular Medicine
Background:
- Coronary heart disease and cerebrovascular disease often coexist.
- Atherosclerosis is a systemic process affecting multiple vascular beds.
- Understanding the relationship between heart and brain vessel disease is crucial for comprehensive patient management.
Purpose of the Study:
- To investigate the relationship between coronary heart disease and carotid artery disease.
- To evaluate the utility of multigated radionuclide angiography and Doppler ultrasonography in assessing these conditions.
- To explore the concept of atherosclerosis as a unified disease process.
Main Methods:
- Fifty-five patients with suspected coronary heart disease underwent multigated radionuclide angiography (MUGA) to assess left ventricular function.
- Left ventricular contour was divided into five sectors to determine isocontours and regional ejection fractions.
- Continuous wave Doppler of the carotids was performed, categorizing patients into normal, moderately diseased, and frankly diseased groups.
- Discriminant analysis using isocontour and ejection fraction values classified patients into Doppler-defined groups.
Main Results:
- The combined analysis of five isocontour values and five ejection fraction values correctly classified 67.27% of patients into their respective carotid Doppler groups.
- Using only isocontour values, ejection fraction values, or specific wall motion parameters resulted in lower classification accuracy.
- This suggests that a comprehensive assessment of left ventricular function provides valuable information regarding cerebrovascular status.
Conclusions:
- Multigated radionuclide angiography parameters, when combined, can effectively differentiate degrees of carotid artery disease in patients with coronary heart disease.
- The findings support the hypothesis that atherosclerosis is a single, systemic disease affecting both coronary and carotid arteries.
- Integrated assessment of cardiac and cerebrovascular health is recommended for a holistic understanding of atherosclerotic disease.
Abstract:
The multigated radio nuclide angiography was executed in 55 patients that were investigated for coronary heart disease and the left ventricular contour was determined in left anterior oblique view. The left ventricular contour was divided in 5 sectors and the isocontours (percentage of excursion between the systole and the diastole) and the regional ejection fractions were determined. The continuous wave Doppler test of the carotids was executed in the same patients. The patients were divided in 3 groups according to Doppler test: the group 1 owned the patients with the normal test (35 patients); the group 2 owned the patient with the moderately diseased test (14 patients); the group 3 owned the patients with frankly diseased test (6 patients). The following statistical analysis was executed: the 5 values of the isocontours and the 5 values of the ejection fractions were used to classify the patients in the 3 groups by mean of a discriminant analysis according to Fisher and the group for the highest conditional probability was considered for every patient. The analysis fixed that the 5 + 5 values of each patient classified correctly the 67.27 of the cases. If the only the values of the isocontours or of the ejection fractions or of the septum or of the ventricular lateral wall were used, the cases correctly classified were fewer. This paper contributes to the study of the relationship between the heart disease and the brain vessel disease and allows to regard the atherosclerosis a unique disease.