Predictive Factors of Systolic Dysfunction in Non-complicated Hypertensive Patients

Study Overview
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Brief Summary
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Hypertension is a major cardiovascular risk factor. Heart failure is one of its main complications but the factors that influence its development are still insufficiently known. The primary objective is to determine associated factors to the occurrence of left ventricular (LV) systolic dysfunction assessed by an alteration of the Global Longitudinal Strain (GLS) after more than the years of hypertension. The secondary objective is to estimate the prevalence of LV systolic dysfunction in a cohort of hypertensive people followed for over 10 years and formulate pathophysiological hypotheses on the development of this heart disease.

Detailed Description
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Some of the hypertensive patients will develop a post hypertensive heart disease. This hypertrophic cardiomyopathy is now essentially defined by the association of LV hypertrophy and diastolic dysfunction. Investigators believe this hypertrophic cardiomyopathy is also characterized by early impairment of systolic function but mainly in its longitudinal component (assessed by measuring the GLS) and therefore exposed to cardiovascular events. The work is based on an existing cohort of hypertensive patients included more than 10 years ago before any initiation of antihypertensive therapy in the hypertension unit of the Bordeaux University Hospital, France. Patients will be contacted for further consultation with a cardiologist to identify patients with a LV systolic dysfunction. The primary end-point is a decrease of the longitudinal systolic function with a GLS<-17% for men and <-19% for women. A sufficient number of patients will be contacted in order to collect data of at least 400 patients after more than 10-year of follow-up.

Official Title
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Predictive Factors of Systolic Dysfunction in Non-complicated Hypertensive Patients (GLS OBservationAL Study in HyperTensioN - GLOBAL-HTN)

Conditions
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Hypertension

Intervention / Treatment
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* Device: Cardiac echography


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patient who was diagnosed as hypertensive more than 10 years ago and who underwent cardiac-echography, ECG, a biological blood test and an ambulatory blood pressure measurement before the introduction of antihypertensive treatment. Exclusion Criteria: Oral refusal of patient participation or its legal representatives, reading the specific information note for the study.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Hypertensive people<br>Hypertensive people recruited 10 years ago before any anti-hypertensive treatment | Device: Cardiac echography<br>* The exam is in the left lateral decubitus position. 4 electrodes are applied to the patient's chest for a synchronization with the Electrocardiogram (ECG). The examination is conducted as standard with acquisition loops of records in parasternal long axis parasternal short axis, apical 4-cavities, 2-cavities and aorta 2 cavities.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Measure of GLS | GLS measurement is a percentage obtained on cuts apical 4-chamber, 2-aortic cavities and 2 cavities (average of 3 impacts) after locating the aortic pulsed Doppler of the opening and closing of the aortic valve. GLS < -17% for men and < -19% for women. | Day 1 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Heart failure, Systolic dysfunction, GLS, Arterial stiffness, Left ventricular hypertrophy