Heart failure with preserved ejection fraction: from echocardiographic characteristics to a cardiovascular damage score in a high-risk hypertensive population.

Abstract

Background: Heart failure with preserved ejection fraction (HFpEF) is a high prevalence condition, with high rates of hospitalization and mortality. Arterial hypertension is the main risk factor for HFpEF. Among hypertensive patients, alterations in cardiac and vascular morphology identify hypertension-mediated organ damage (HMOD). Cardiac HMOD in terms of ventricular hypertrophy and diastolic dysfunction is a continuum between the preclinical condition (arterial hypertension) and HFpEF. In hypertensive patients, it is currently unknown what is the prevalence of individuals classifiable as being at high risk of developing HFpEF and whether aortic morphofunctional vascular changes are present.

Aim: This study seeks to retrospectively assess the prevalence of echocardiographic alterations consistent with the diagnosis of HFpEF in a cohort of patients with essential arterial hypertension, and the prevalence of vascular HMOD (V-HMOD) in different risk categories of patients.

Methods: Hypertensive outpatients referred at the Hypertension Center of Turin from 2003 to 2021 were retrospectively evaluated. Patients with a previous diagnosis of heart failure and known cardiovascular events were excluded. A predictive model associated with the risk of HFpEF development was calculated using echocardiographic variables. V-HMOD morphological and functional parameters were assessed by ascending aorta diameter and arterial stiffness (carotid-femoral pulse wave velocity, cfPWV).

Results: Eight hundred and four patients (34.8% women) were analyzed, age 53.1 ± 14 years; left ventricular mass index (LVMi) and E / e' ratio were impaired in 15.9 and 29.1% of cases, respectively. Dividing them into tertiles according to score: score 1 or less (30.2%); score 2-3 (47.4%); score at least 3 (22.7%). Patients identified at high risk of HFpEF (score ≥3) had higher age, BMI and blood pressure than the other two groups ( P  < 0.05); they showed a significantly higher prevalence of female patients (42.3%), treatment with at least two antihypertensive drugs (40.1%), diabetes (7.1%), and dyslipidemia (28%; P  < 0.05), with a larger ascending aorta diameter (35.5 ± 5.5 mm, P  < 0.05) and higher cfPWV (8.8 ± 2.4 m/s, P  < 0.05).

Conclusion: At least one in five hypertensive patients, referred to an outpatient echocardiographic examination, has C-HMOD compatible with a high-risk category of HFpEF and have a significant increase in V-HMOD. This reinforces the notion that arterial hypertension and HFpEF are not two distinctly separate conditions but a continuum of pathophysiologic alterations.