Diagnostic performance of left ventricular mechanical dyssynchrony indices using CMR feature tracking

This dataset has been curated and made available as part of a study by Loewenstein, et al (https://doi.org/10.1101/2022.11.11.22282225). The aim of the study was to evaluate the diagnostic performance of mechanical dyssynchrony indices in a study population of patients with severely reduced ejection fraction and no LV myocardial scar assessed by cardiovascular magnetic resonance (CMR), and either left bundle branch block (LBBB) or normal QRS duration. <br> We retrospectively identified 80 patients from three centers, with LV ejection fraction &lt;=35%, no scar by CMR late gadolinium enhancement, and either normal electrocardiographic QRS duration (&lt;120ms) and normal frontal plane electrical axis (-30 to +90 degrees) (control, n=36), or LBBB by Strauss’ criteria (LBBB, n=44). <br> Provided is the image data and analysis code to reproduce all aspects of the current study. <br> Datasets with original and delineated CMR exams can be found in the provided zip archive. <br> Please see the README.docx document provided above for more details.