Association of arterial hemodynamics with left ventricular systolic function in hypertensive patients: A longitudinal study

Abstract

Background. Left ventricular (LV) systolic impairment, particularly in the longitudinal direction, is considered an early and sensitive marker of hypertensive heart disease and increased cardiovascular risk. The evidence indicates that aortic stiffness and central hemodynamic factors are important determinants of LV performance, mediating the interaction between the heart and vascular load. Despite the existence of cross-sectional analyses linking central blood pressure (BP) parameters with LV mechanics, no longitudinal data are available which include serial measurements in the course of antihypertensive treatment. Objectives.To investigate the associations between changes in LV longitudinal and circumferential function with alterations in arterial hemodynamics and ventricular-arterial coupling (VAC) in patients with uncomplicated hypertension during a 12-month follow-up. Materials and methods.In this retrospective study, 216 patients (age 64.3 ±7.6 years) underwent echocardiography including left ventricular longitudinal (GLS) and circumferential strain (GCS) analysis, brachial BP measurements, VAC (combining echocardiography and brachial BP), and arterial hemodynamics using radial tonometry at baseline and after 12 months of antihypertensive therapy. Patients were grouped into 2 subsets: with improvement in GLS (n = 103) and with deterioration in GLS (n = 113).Results. No significant differences were observed in the majority of cardiovascular, demographic or clinical characteristics between the groups. The subset with improvement in GLS demonstrated more favorable changes over follow-up in pulse wave velocity (p = 0.03), central augmentation pressure (p = 0.01) and ventricular-arterial coupling (p = 0.04) compared to patients showing deterioration in GLS. In the multivariable analysis, independent determinants of changes in GLS were: GLS at baseline (−0.48; p < 0.001), changes from baseline to follow-up in central augmentation pressure (−0.29; p = 0.002) and ventriculararterial coupling (−0.25; p = 0.004). Independent determinants of analogous changes in GCS were: GCS at baseline (−0.46; p < 0.001) and changes in central augmentation pressure (−0.22; p = 0.02). Conclusions.Left ventricular longitudinal and circumferential functional remodeling over time in hypertensive patients is associated with arterial hemodynamics and ventricular-arterial coupling.