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[Coronary disease. I. A correlative study on hemodynamics and contactility in 110 patients]
Insights
Coronary heart disease impairs heart function, increasing pressures and decreasing cardiac output. Myocardial contractility also reduces, correlating with coronary artery stenosis severity.
Area of Science:
- Cardiology
- Physiology
Context:
- Coronary heart disease (CHD) significantly impacts cardiovascular function.
- Assessing hemodynamic changes and myocardial contractility is crucial for understanding CHD progression.
Purpose:
- To investigate hemodynamic alterations and myocardial contractility indices in patients with coronary heart disease.
- To correlate these changes with the severity of coronary artery stenosis.
Summary:
- Hemodynamic measures revealed increased right heart pressures (48-71%) and systolic aortic pressure (20-22%) in CHD patients compared to controls.
- Left ventricular end-diastolic pressure rose by 130%, while cardiac output and index decreased by 20-33% due to reduced stroke volume.
- Isovolumic indices of myocardial contractility (dp/dtmax, t-dp/dtmax, dpmax/IP) were diminished, particularly in patients with left ventricular aneurysm, and correlated with stenosis severity.
Impact:
- Findings highlight reduced pump function and contractility in coronary heart disease.
- Demonstrates a direct correlation between hemodynamic dysfunction, impaired myocardial performance, and the degree of coronary artery stenosis.
Abstract:
Hemodynamics measures and indices of myocardial contractility were determined in 110 patients with coronary heart disease. In comparison to a normal group (n=20) right heart pressures (right ventricle, arteria pulmonalis) were increased in coronary heart disease by 48-71%. Systolic aortic pressure was increased by 20-22%. Left ventricular enddiastolic pressure was consideraibly increased by 130%, dependent on the severity degree of coronary artery disease. Cardiac output and cardiac index were decreased at comparable heart rate by 20-33%, dependent on an effective decrease of stroke volume. Isovolumic indices of myocardial contractility (dp/dtmax, t-dp/dtmax, dpmax/IP) WERE REDUCED IN CORONARY HEART DISEASE PARALLEl to the severity degree of coronary artery stenosis. All the hemodynamic chances were most pronounced in a group with left ventricular aneurysm. The results demonstrate that myocardial performance in coronary heart disease is characterized by decreases of pump function and contractility in correlation with the severity degree of coronary artery stenosis.