ISMRM & SMRT Virtual Conference • 08-14 August 2020

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Sunrise Session

CMR for Cardiac Function Beyond Ejection Fraction:
Myocardial Strain Imaging

Session Topic: Educational Q&A: CV Sunrise
Session Sub-Topic: CMR for Cardiac Function Beyond Ejection Fraction: Myocardial Strain Imaging
Sunrise Session
ORGANIZERS: Dana Peters, Peng Hu
Wednesday Parallel 1 Live Q&A Wednesday, 12 August 202013:45 - 14:30 UTC Moderators: 
Skill Level: Basic to Advanced

Session Number: S-Tu-02

This sunrise course will provide an overview of technologies and clinical applications of CMR for evaluating function of the heart, beyond LV EF, including systolic function and diastolic and atrial contraction phases. This overview will include evaluation of phasic volumes but will also describe newer technologies such as evaluation of strain, with tagging and feature-tracking, fibrosis, and flow, and how these relate to tissue characterization and myocardial remodeling.

Target Audience
- Physicists and engineers who wish to obtain a basic understanding of the clinical need for imaging cardiac function, which include quantification of volumes and ejection fractions, but also measurement of phasic volumes, strain and flow in the ventricles, atria, and aorta;
- Physicists and clinicians who wish to acquire an understanding of current CMR tools that are available for evaluating cardiac function, including systolic and diastolic function; and
- Physicists and clinicians who wish to obtain a current understanding of how cardiac structure and function are related.

Educational Objectives
As a result of attending this course, participants should be able to:
- Describe which functional measurements are useful based on clinical needs;
- Define the basic principles of myocardial strain imaging, feature-tracking, flow imaging and tissue characterization techniques; and
- Explain the basic natural history of cardiac remodeling that leads to reduced diastolic function.


    Methods for Myocardial Strain Imaging
Frederick Epstein

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    Methods for Myocardial Strain Imaging Beyond the LV
Liang Zhong

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Myocardial strains are defined as a fractional change in length of a myocardial segment relative to its baseline length. Myocardial strains are more sensitive than ventricular ejection fraction (EF) to identify sub-clinical ventricular dysfunction in diverse heart diseases. Among all the strain parameters, longitudinal strain is more reproducible than radial and circumferential strain and rotation and hence is recommended as routine measurements to detect reduction in ventricular function prior to conventional EF falls. Methods for myocardial strains beyond left ventricle will be presented.