Related Experiment Videos
[Urinary catecholamine excretion and cardiac output in hypertensive patients]
Insights
This study in 70 hypertonic disease patients found normal noradrenaline excretion in most cases, with a correlation between noradrenaline and cardiac output. Adrenaline excretion was generally normal, with no age or hypertension-related discrepancies.
Area of Science:
- Cardiology
- Endocrinology
- Hypertension Research
Context:
- Hypertonic disease (hypertension) affects cardiac function and hormonal balance.
- Understanding the relationship between cardiac output and catecholamine excretion is crucial for managing hypertension.
Purpose:
- To investigate the relationship between cardiac output, stroke volume, and minute volume with urinary adrenaline and noradrenaline excretion in patients with varying stages of hypertonic disease.
- To determine if age and the degree of arterial hypertension influence these physiological parameters.
Summary:
- Cardiac output was measured in 70 patients with hypertonic disease (stages I-III) using the dye-dilution method.
- Urinary adrenaline and noradrenaline levels were assessed. Noradrenaline excretion was normal in 75.8% and decreased in 24.2%; adrenaline was increased in 7.1% and normal in 92.9%.
- A moderate positive correlation was observed between noradrenaline excretion and cardiac index/stroke index, independent of hypertension severity or patient age.
Impact:
- Provides insights into the neuroendocrine and hemodynamic alterations in hypertonic disease.
- Highlights the potential role of noradrenaline in modulating cardiac function in hypertensive patients.
- Informs clinical understanding and potential therapeutic targets for managing hypertension and its cardiovascular consequences.
Abstract:
Cardiac output was determined to 70 patients with hypertonic disease I, II and III stage by dye-dilution method and urine excretion of adrenaline and noradrenaline was determined by fluorescence method. The extent of stroke and minute volume was determined depending on the stage of the disease, degree of arterial hypertension and patients' age. Noradrenaline excretion was normal in 75.8 per cent from the whole group of the patients examined and decreased in 24.2 per cent. Adrenaline excretion was increased in 7.1 per cent and with normal values--in 92.9 per cent of the patients. No discrepancies in adrenaline and noradrenaline excretion were found in the patients with hypertonic disease, depending both on the degree of arterial hypertension and patients' age. A moderate positive correlation was found between noradrenaline excretion and cardiac index and stroke index.