Speckle-Tracking Echocardiographic Strain Analysis Reliably Estimates Degree of Acute LV Unloading During Mechanical LV Support by Impella

Speckle-Tracking Echocardiographic Strain Analysis Reliably Estimates Degree of Acute LV... Non-invasive means of evaluating appropriate cardiac unloading remain to be established. We hypothesized that myocardial deformation assessed by echocardiographic speckle-tracking strain analysis can reliably estimate the degree of left ventricular (LV) unloading under mechanical circulatory support. A total of 24 Yorkshire pigs underwent Impella-mediated acute LV unloading 1–2 weeks after myocardial infarction (MI). Echocardiographic and invasive pressure-volume measurements were used to evaluate the degree of LV unloading. Pressure-volume analysis before and after LV unloading exhibited a significant decrease in stroke work (3399 ± 1440 to 1244 ± 659 mmHg ml, p < 0.001), suggesting reduced external cardiac work. Both longitudinal strain (− 14.6 ± 4.1% to − 10.6 ± 2.3%, p < 0.001) and circumferential strain (− 18.7 ± 6.1% to − 9.3 ± 3.5%, p < 0.001) decreased after LV unloading, and there were linear relationships between stroke work and echocardiographic longitudinal (r = − 0.61, p < 0.001) as well as circumferential strains (r = − 0.75, p < 0.001). Echocardiographic LV strain analysis offers a non-invasive assessment of LV unloading in subacute MI. . . . . . Keywords Mechanical support LS CS Contraction Sub-acute MI Ischemic heart failure Abbreviations LS Longitudinal strain 2DE Two-dimensional echocardiography http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Cardiovascular Translational Research Springer Journals

Speckle-Tracking Echocardiographic Strain Analysis Reliably Estimates Degree of Acute LV Unloading During Mechanical LV Support by Impella

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Medicine & Public Health; Cardiology; Human Genetics; Biomedical Engineering; Biomedicine, general; Medicine/Public Health, general
ISSN
1937-5387
eISSN
1937-5395
D.O.I.
10.1007/s12265-018-9812-2
Publisher site
See Article on Publisher Site

Abstract

Non-invasive means of evaluating appropriate cardiac unloading remain to be established. We hypothesized that myocardial deformation assessed by echocardiographic speckle-tracking strain analysis can reliably estimate the degree of left ventricular (LV) unloading under mechanical circulatory support. A total of 24 Yorkshire pigs underwent Impella-mediated acute LV unloading 1–2 weeks after myocardial infarction (MI). Echocardiographic and invasive pressure-volume measurements were used to evaluate the degree of LV unloading. Pressure-volume analysis before and after LV unloading exhibited a significant decrease in stroke work (3399 ± 1440 to 1244 ± 659 mmHg ml, p < 0.001), suggesting reduced external cardiac work. Both longitudinal strain (− 14.6 ± 4.1% to − 10.6 ± 2.3%, p < 0.001) and circumferential strain (− 18.7 ± 6.1% to − 9.3 ± 3.5%, p < 0.001) decreased after LV unloading, and there were linear relationships between stroke work and echocardiographic longitudinal (r = − 0.61, p < 0.001) as well as circumferential strains (r = − 0.75, p < 0.001). Echocardiographic LV strain analysis offers a non-invasive assessment of LV unloading in subacute MI. . . . . . Keywords Mechanical support LS CS Contraction Sub-acute MI Ischemic heart failure Abbreviations LS Longitudinal strain 2DE Two-dimensional echocardiography

Journal

Journal of Cardiovascular Translational ResearchSpringer Journals

Published: May 29, 2018

References

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