RESEARCH ARTICLE


Predictors of Impaired Left Ventricular Global Longitudinal Strain in Patients with Essential Hypertension and Preserved Ejection Fraction



Ahmed A. Noori1, *, Mudhafar A. Barzani2
1 Department of Cardiology, Erbil Cardiac Center, Erbil, Iraq
2 Department of Medicine, Hawler Medical University, Erbil, Iraq


Article Metrics

CrossRef Citations:
0
Total Statistics:

Full-Text HTML Views: 1591
Abstract HTML Views: 306
PDF Downloads: 456
ePub Downloads: 207
Total Views/Downloads: 2560
Unique Statistics:

Full-Text HTML Views: 924
Abstract HTML Views: 204
PDF Downloads: 297
ePub Downloads: 158
Total Views/Downloads: 1583



Creative Commons License
© 2022 Noori and Barzani

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Cardiology, Erbil Cardiac Center, Erbil, Iraq; Tel: +964 750 743 54 16; E-mail: ahmedadib@yahoo.com


Abstract

Background:

Early identification of hypertensive patients at risk of heart failure (HF) helps guide treatment intensification and predict prognosis. Global longitudinal strain (GLS) derived from two-dimensional speckle-tracking echocardiography (STE) uncovers subclinical left ventricular (LV) systolic dysfunction (SLVSD) in patients with hypertension (HT) and preserved LV ejection fraction (PLVEF). STE is unavailable and/or underutilized in our locality for financial and technical reasons.

Objectives:

We aim to identify clinical and echocardiographic parameters associated with and/or predictive of impaired GLS in hypertensive patients with PLVEF.

Method:

In this single-clinic, cross-sectional, observational study, 100 hypertensive patients with PLVEF were examined using conventional and 2D STE.

Results:

The average GLS was found to be mildly reduced (-18.4 ± 2.2%) in the study group. Lower GLS (than -19%) was more common among patients with poorly controlled HT (Odds Ratio (OR)=9), being on multiple anti-hypertensive agents (OR=5), positive Sokolow-Lyon electrocardiographic criteria (OR=4.3), and obesity (OR=2). Conventional echocardiographic parameters predicting impaired GLS included: mitral annular plane systolic excursion (MAPSE) (p=0.001), inter-ventricular septal thickness (IVSd) (p=0.003), LV mass (p=0.003), and LV remodelling (p=0.02). The aortic acceleration-to-ejection time ratio (AT/ET) had a good correlation with GLS (p=0.034). The novel product (IVSd x AT/ET) ≥2.7 mm was found to be the best predictor of GLS worse than -19% (AU ROC=0.8, 95% CI [0.68-0.93]; p=0.001).

Conclusion:

In hypertensive patients with PLVEF, GLS was found to correlate well with blood pressure (BP) control, body size, measures of LV mass, and MAPSE. These parameters predict at least 50% of the variance in GLS and could help practitioners with limited access to STE in risk-stratifying hypertensive patients.

Keywords: Hypertension, Global longitudinal strain, Speckle tracking, Echocardiography, PLVEF, LV.