Satish Ramkumar1, Hong Yang2, Ying Wang2, Mark Nolan2, Tomoko Negishi2, Kazuaki Negishi2, Thomas H Marwick3. 1. Department of Cardiac Imaging, Baker Heart and Diabetes Institute, Melbourne, Australia; School of Public Health and Preventative Medicine, Monash University, Melbourne, Australia. 2. Department of Cardiac Imaging, Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia. 3. Department of Cardiac Imaging, Baker Heart and Diabetes Institute, Melbourne, Australia; School of Public Health and Preventative Medicine, Monash University, Melbourne, Australia; Department of Cardiac Imaging, Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia. Electronic address: tom.marwick@baker.edu.au.
Abstract
BACKGROUND: Left atrial (LA) strain imaging enables the quantitative assessment of LA function. The clinical relevance of these measurements is dependent on the provision of information incremental to the left ventricular (LV) evaluation. The aim of this study was to test the hypothesis that LA pump function but not reservoir function is independent of measurement of LV mechanics. METHODS: Echocardiography was undertaken in a community-based study of 576 participants ≥65 years of age with one or more risk factors (e.g., hypertension, diabetes mellitus, obesity). Strain analysis was conducted using a dedicated software package, using R-R gating. LV function was classified as normal in the presence of global longitudinal strain (GLS) (≤-18%) or global circumferential strain (GCS) (≤-22%). The associations between GLS or GCS and LA reservoir, conduit, and pump strain were assessed using univariate and multivariate linear regression. RESULTS: Patients (mean age 71 ± 5 years, 54% women) with reduced GLS had higher blood pressure and rates of diabetes and obesity (P < .05). LA reservoir strain and conduit strain were lower in the group with impaired GLS (38.2 ± 7.3% vs 39.9 ± 6.4% [P = .004] and 18.7 ± 5.7% vs 20.5 ± 5.1% [P < .001], respectively), but there was no difference in LA pump strain (19.5 ± 5.5% vs 19.3 ± 4.6%, P = .72). GLS was independently associated with LA reservoir and conduit strain (P < .05) but not independently associated with LA pump strain (P = .91). Reduced GCS was associated with a larger body mass index, male sex, and diabetes (P < .05). There were no differences in LA reservoir, conduit, and pump strain in patients with normal and abnormal GCS (P > .05). CONCLUSIONS: The application of LA strain is specific to the component measured. LA pump strain is independent of LV mechanics.
BACKGROUND: Left atrial (LA) strain imaging enables the quantitative assessment of LA function. The clinical relevance of these measurements is dependent on the provision of information incremental to the left ventricular (LV) evaluation. The aim of this study was to test the hypothesis that LA pump function but not reservoir function is independent of measurement of LV mechanics. METHODS: Echocardiography was undertaken in a community-based study of 576 participants ≥65 years of age with one or more risk factors (e.g., hypertension, diabetes mellitus, obesity). Strain analysis was conducted using a dedicated software package, using R-R gating. LV function was classified as normal in the presence of global longitudinal strain (GLS) (≤-18%) or global circumferential strain (GCS) (≤-22%). The associations between GLS or GCS and LA reservoir, conduit, and pump strain were assessed using univariate and multivariate linear regression. RESULTS:Patients (mean age 71 ± 5 years, 54% women) with reduced GLS had higher blood pressure and rates of diabetes and obesity (P < .05). LA reservoir strain and conduit strain were lower in the group with impaired GLS (38.2 ± 7.3% vs 39.9 ± 6.4% [P = .004] and 18.7 ± 5.7% vs 20.5 ± 5.1% [P < .001], respectively), but there was no difference in LA pump strain (19.5 ± 5.5% vs 19.3 ± 4.6%, P = .72). GLS was independently associated with LA reservoir and conduit strain (P < .05) but not independently associated with LA pump strain (P = .91). Reduced GCS was associated with a larger body mass index, male sex, and diabetes (P < .05). There were no differences in LA reservoir, conduit, and pump strain in patients with normal and abnormal GCS (P > .05). CONCLUSIONS: The application of LA strain is specific to the component measured. LA pump strain is independent of LV mechanics.
Authors: Francesco Bandera; Anita Mollo; Matteo Frigelli; Giulia Guglielmi; Nicoletta Ventrella; Maria Concetta Pastore; Matteo Cameli; Marco Guazzi Journal: Front Cardiovasc Med Date: 2022-01-13
Authors: Athanasios Frydas; Daniel A Morris; Evgeny Belyavskiy; Aravind-Kumar Radhakrishnan; Martin Kropf; Marijana Tadic; Lothar Roessig; Carolyn S P Lam; Sanjiv J Shah; Scott D Solomon; Burkert Pieske; Elisabeth Pieske-Kraigher Journal: ESC Heart Fail Date: 2020-07-02
Authors: Sung-Hee Shin; Brian Claggett; Riccardo M Inciardi; Angela B S Santos; Sanjiv J Shah; Michael R Zile; Marc A Pfeffer; Amil M Shah; Scott D Solomon Journal: J Am Heart Assoc Date: 2021-07-30 Impact factor: 5.501