Abstract
Background Cardiac magnetic resonance (CMR) can be used to quantify cardiac mechanics from images that are generally acquired during an end-expiratory breath-hold. Unfortunately, it is difficult for subjects to hold their breath at the exact same position when undergoing a series of breath-holds during a typical CMR study. The effect of patient-specific variability in breath-hold positions on measures of cardiac mechanics has not been investigated. We hypothesized that normal variability in breath-hold positions would significantly affect estimates of left ventricular strains and torsion.
Highlights
Cardiac magnetic resonance (CMR) can be used to quantify cardiac mechanics from images that are generally acquired during an end-expiratory breath-hold
It is difficult for subjects to hold their breath at the exact same position when undergoing a series of breath-holds during a typical CMR study
The diaphragm was measured at a sampling rate of 3Hz with the respiratory navigator sequence built into the DENSE sequence
Summary
Cardiac magnetic resonance (CMR) can be used to quantify cardiac mechanics from images that are generally acquired during an end-expiratory breath-hold. It is difficult for subjects to hold their breath at the exact same position when undergoing a series of breath-holds during a typical CMR study. The effect of patient-specific variability in breath-hold positions on measures of cardiac mechanics has not been investigated. We hypothesized that normal variability in breath-hold positions would significantly affect estimates of left ventricular strains and torsion
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