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Stability of left ventricular longitudinal and circumferential deformation over time and standard loading conditions

Citation

Kosmala, W and Przewlocka-Kosmala, M and Sharman, JE and Schultz, MG and Marwick, TH, Stability of left ventricular longitudinal and circumferential deformation over time and standard loading conditions, European Heart Journal - Cardiovascular Imaging, 18, (9) pp. 1001-1007. ISSN 2047-2404 (2017) [Refereed Article]

Copyright Statement

Copyright 2016 The Author. Published on behalf of the European Society of Cardiology. All rights reserved.

DOI: doi:10.1093/ehjci/jew135

Abstract

AIMS: Load dependence is an important source of variation in left ventricular (LV) deformation. This impacts on the precision of information obtained from serial measurements. However, it is clinically important to distinguish actual myocardial dysfunction from changes associated with altered loading conditions. We sought to investigate the association of changes of loading parameters with changes in LV longitudinal (GLS) and circumferential (GCS) strains.

METHODS AND RESULTS: Baseline and a 12-month follow-up 2D echocardiograms were performed in 191 Stage A heart failure patients with uncomplicated hypertension. These patients underwent simultaneous measurement of conventional and central blood pressures (BPs) and haemodynamic measurements by applanation tonometry. Significant, but weak correlations (r = 0.15-0.28) of LV strain parameters and their changes over the follow-up period were shown for the majority of LV afterload-associated variables, including central and brachial systolic, diastolic, and mean BPs; 24-h systolic and diastolic BPs; peak reservoir and excess pressures; central augmented pressure (CAP) and pulse pressure; augmentation index; and arterial elastance index (EaI). Central mean BP, EaI, and changes in CAP and EaI over follow-up were independent contributors to LV deformation in multivariable analysis. No improvement in the Bland-Altman 95% limits of agreement and correlation coefficients was seen with LV afterload correction of GLS and GCS using central BP indices.

CONCLUSIONS: LV longitudinal and circumferential strains in a population without apparent heart disease is relatively insusceptible to changes in LV afterload within physiological range, which, therefore, seem unlikely to be a significant confounder in repeated GLS or GCS observations.

Item Details

Item Type:Refereed Article
Keywords:left ventricular, loading conditions, strain (longitudinal, circumferential)
Research Division:Medical and Health Sciences
Research Group:Cardiorespiratory Medicine and Haematology
Research Field:Cardiology (incl. Cardiovascular Diseases)
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Cardiovascular System and Diseases
Author:Kosmala, W (Professor Wojciech Kosmala)
Author:Sharman, JE (Professor James Sharman)
Author:Schultz, MG (Dr Martin Schultz)
Author:Marwick, TH (Professor Tom Marwick)
ID Code:110112
Year Published:2017 (online first 2016)
Web of Science® Times Cited:1
Deposited By:Menzies Institute for Medical Research
Deposited On:2016-07-13
Last Modified:2017-12-12
Downloads:0

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