Individualized Physical Activity and Carotid Plaque Instability

Summary

Intraplaque hemorrhage (IPH) is one of the main features of the carotid plaque instability's and predictor of ischemic stroke. Benefits (on the basis on benefit/risk ratio) of the carotid endarterectomy remain unclear for stroke asymptomatic patients; thus, more and more patients with important stenosis (i.e. over 60%) detected are not operated. However, these patients need adapted therapeutic treatments to limit plaque instability and this should include physical activity (PA). Indeed, PA has been showed to decrease numerous inflammatory markers involved in atherosclerosis. It has also recently been reported on stroke asymptomatic patients that the prevalence of carotid IPH was decreased in those with higher level of PA. Magnetic Resonance Imaging (MRI) of the IPH has been shown to be the better non-invasive imaging technique to assess carotid plaque instability and in particular IPH. Here, the aim of this study is to assess the effect of an individualized home-based 6 months physical activity intervention on carotid IPH and other biomarkers of vulnerability for asymptomatic patients.

This study has been designed as a monocentric, longitudinal and interventional study. This study will involve one centre: Hopital Louis Pradel (HCL, Lyon). After inclusion tests, patients will be randomly included in the control group, or in the PA group. Patients of the PA group will have connected bracelets to measure daily count of steps. Twice a month, daily goals will be revaluated to increase or maintain the steps per day. The final goal is to reach 6 000 steps per day or increase by 30% the initial count of steps per day. Same tests will be done after 6 months of intervention for comparison.

Conditions

• Carotid Atherosclerosis

Interventions

DEVICE

individualized home-based physical activity

Subjects will have to reach a daily goal in number of steps, based on the initial evaluation, during 6 months . They will wear connected wrists, and will be contacted twice a month by phone call by an adapted physical activity to revaluate these goals.

OTHER

MRI

An MRI will be performed for each patient at the end of the study to identify IPH and other features of histological vulnerability (lipid core, fibrous cap integrity and calcifications).

BIOLOGICAL

blood sampling

Blood will be collected, to analyse monocyte phenotype by flow cytometry, blood rheology by ektacytometry, coagulation by rotational thromboelastometry (ROTEM). Plasma will be extracted from blood to assess inflammation, oxidative stress and antioxidant markers.

OTHER

Questionnaires

sedentary, physical activity, nutrition and quality of life questionnaire will be performed fo each patient.

OTHER

6-minute walk test

The 6-minute walk test is a simple, individualized test that measures how fast a patient walks on a flat, hard surface for 6 minutes.

Sponsors & Collaborators

• Hospices Civils de Lyon

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

SINGLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2019-12-03

Primary Completion

2022-09-12

Completion

2022-09-21

Countries

• France

Study Locations