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[Hemodynamic types of hypertensive disease according to echocardiographic data]
Insights
This study on essential hypertension found that increased peripheral resistance is key to high blood pressure, regardless of cardiac output. Hyperkinetic hypertension involves increased stroke output, explained by the Frank-Starling law.
Area of Science:
- Cardiology
- Hypertension Research
- Hemodynamics
Background:
- Essential hypertension is a complex condition affecting central hemodynamics.
- Neurocirculatory dystonia presents with high cardiac index but normal arterial pressure.
- Understanding hemodynamic profiles is crucial for hypertension management.
Purpose of the Study:
- To investigate central hemodynamic parameters in patients with essential hypertension.
- To differentiate hemodynamic patterns in essential hypertension subtypes.
- To explore the pathogenetic mechanisms of hypertension related to cardiac output and peripheral resistance.
Main Methods:
- Echocardiography was used to assess central hemodynamics.
- Patients with neurocirculatory dystonia and essential hypertension were studied.
- Hemodynamic parameters were evaluated before and after treatment in hypertensive patients.
Main Results:
- Essential hypertension was classified into hyperkinetic and normal cardiac index groups.
- The hyperkinetic group showed increased stroke index and left ventricular diastolic diameter with preserved ejection fraction.
- Increased cardiac index in hyperkinetic hypertension is attributed to enhanced stroke output via the Frank-Starling mechanism.
Conclusions:
- Elevated peripheral resistance is identified as a primary pathogenetic mechanism in essential hypertension.
- Hemodynamic profiling aids in understanding hypertension subtypes.
- The Frank-Starling law explains increased cardiac output in hyperkinetic hypertension.
Abstract:
Central hemodynamics was studied by means of echocardiography in 7 patients suffering from neurocirculatory dystonia with a high cardiac index but normal arterial pressure, and in 41 patients with essential hypertension prior to, and after treatment. Two groups of patients suffering from essential hypertension were distinguished: with a hyperkinetic type of circulation and with a normal cardiac index. In the first group there was a statistically significant increase in the stroke index and the index of diastolic left ventricular diameter with a normal ejection fraction. The increase in the cardiac index in the hyperkinetic type of essential hypertension is caused by an increase in the stroke output according to the Frank--Starling law. The authors believe that the increase in peripheral resistance is the principal pathogenetic mechanism of hypertension with any level of the minute volume.