Charge pulsatile, rigidité artérielle et strain global longitudinal chez les patients hypertendus trai-tés non diabétiques
Abstract
Introduction : Chez les patients hypertendus, le strain global longitudinal (GLS) peut détecter des anomalies myocardiques malgré une fraction d’éjection ventriculaire gauche (FEVG) préservée. La pression pulsée centrale (PPC) et la vitesse de l’onde de pouls (VOP) reflètent respectivement la charge pulsatile centrale et la rigidité artérielle.
Objectif : Évaluer l’association entre PPC et GLS chez des patients hypertendus traités non diabétiques et sa persistance après ajustement sur l’âge, l’IMC et la VOP.
Méthodes : Cette étude transversale a inclus 46 patients hypertendus traités, non diabétiques, avec FEVG préservée. La PPC, la VOP et le GLS ont été mesurés. Les associations ont été étudiées par les corrélations de Pearson et Spearman et par régression linéaire multivariée ajustée sur l’âge, l’IMC et la VOP.
Résultats : L’âge moyen était de 63,3 ± 8,3 ans et 65,2 % étaient des femmes. La PPC était de 43,4 ± 9,5 mmHg, la VOP de 10,4 ± 2,1 m/s et le GLS de −19,3 ± 2,7 %. La PPC était associée au GLS (r = −0,459 ; p = 0,001 ; ρ = −0,374 ; p = 0,011), contrairement à la VOP (r = 0,006 ; p = 0,966). L’association PPC–GLS persistait après ajustement (β = −0,142 ; p < 0,001 ; R² = 0,384).
Conclusion : Chez ces patients hypertendus traités non diabétiques, la PPC était associée au GLS, contrairement à la VOP. Ces résultats exploratoires, issus d’une étude transversale à faible effectif, nécessitent une confirmation dans des études prospectives plus larges.
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