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[Functional state of the myocardium in hypertension (an echocardiographic study)]
Insights
Hypertensive disease (high blood pressure) does not alter left ventricular function in early stages. Echocardiography shows preserved heart muscle contractility and normal ejection fraction, indicating no significant functional changes.
Area of Science:
- Cardiology
- Hypertension Research
- Cardiac Physiology
Background:
- Hypertensive disease, characterized by elevated blood pressure, can affect cardiovascular health.
- Early-stage hypertension may lead to subtle changes in left ventricular function.
- Understanding these changes is crucial for managing cardiovascular risk.
Purpose of the Study:
- To assess the functional condition of the left ventricle in patients with early-stage hypertensive disease.
- To evaluate left ventricular myocardial contractility and performance using echocardiographic parameters.
- To determine if hypertensive disease stages I-II impact cardiac function.
Main Methods:
- Echocardiography was performed on 96 patients diagnosed with stage I-II hypertensive disease.
- Key parameters assessed included ejection fraction, left-ventricular wall tension, and mean rate of myocardial fiber shortening.
- Data were analyzed to correlate these functional indices with disease stage and treatment effects.
Main Results:
- Left-ventricular wall tension increased less than external work indices, suggesting preserved cardiac contractile reserve.
- Ejection fraction and myocardial fiber shortening rates remained within normal limits.
- These parameters showed no dependence on the stage of hypertensive disease or response to treatment.
Conclusions:
- The functional condition of the left-ventricular myocardium remains unchanged in stage I-II hypertensive disease.
- Early hypertension does not significantly impair left ventricular systolic function.
- Preserved contractile reserve is evident in the early stages of hypertensive disease.
Abstract:
The functional condition of the left ventricle was studied in 96 patients with I--II stage hypertensive disease by means of echocardiography according to the value of the ejection fraction, tension of the left-ventricular wall and mean rate of circular shortening of the myocardial fibers. It was found that in hypertensive disease tension of the left-ventricular wall increased to a lesser degree than the indices of external work, which was considered to be a manifestation of preserved contractile reserve of the heart muscle. The ejection fraction and the rate of myocardial fiber shortening did not depend on the stage of the disease, did not change under the effect of treatment and were within normal limits. It is concluded that the functional condition of the left-ventricular myocardium does not change in I--II stage of hypertensive disease.