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Central Hemodynamic and Sodium Urinary — CHASSI  

Hypertension Clinical Trial

Official title:
Analysis of Central Hemodynamic Parameters and Sodium Urinary Excretion in Controlled and Resistant Hypertensive Patients

Clinical Trial Summary

Systemic arterial hypertension is one of major risk factors to development of target organ damage that culminate in cardiovascular diseases such as acute myocardial infarction and stroke. Sodium intake is related with elevation of arterial blood pressure due to rise of cardiac output and of arterial stiffness and it can be estimated by daily sodium excreted in urine 24h. Ambulatory Blood Pressure Monitoring can be used to obtain peripheral and central hemodynamic parameters [arterial stiffness parameters - central blood pressure, pulse wave velocity and augmentation index]. Applanation tonometry also can be used to check same central hemodynamic parameters. Both methods provide us important informations about the patients clinical conditions and help us to infer their prognosis. Therefore, this protocol aims measure the central hemodynamic parameters in hypertensive patients, controlled or resistant, and evaluate their sodium urinary excretion. The hypothesis is the resistant hypertensive patients have parameters higher than controlled hypertensive patients.

Clinical Trial Description

The urinary sodium (Na+) will be evaluated by flame photometry. Excretion of urinary sodium will be calculated by multiplying the urinary sodium concentration in mE /L by 24-hour urinary volume. Two to three urinary Na+ samples will be collected within six months. 3.3.3 ABLOOD PRESSURE MONITORING - 24 HOURS Ambulatorial blood pressure monitoring 24-hour will be performed using a Mobil-O-Graph® compact digital device (version 12, ambulatory pressure monitor, 2000, UK). Individuals will be instructed to maintain their normal activities of daily living. The device will be pre-programmed to measure blood pressure within 24 hours at 30-minute intervals every hour during the waking period and at 1-hour intervals during sleep. This device will evaluate the following parameters: systolic and peripheral diastolic blood pressure, mean arterial pressure, pulse pressure, systolic central aortic pressure, central diastolic aortic pressure (cDBP), central pulse pressure (cPP), augmentation index corrected for 75 bpm (AI75%) and pulse wave velocity (PWV). ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT03932422
Study type Observational [Patient Registry]
Source Hospital de Base
Contact José F Vilela-Martin, MD PhD FAHA
Phone +55 (17) 3201-5727
Email vilelamartin@uol.com.br
Status Recruiting
Phase
Start date July 15, 2019
Completion date March 15, 2021
View Details
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