Accuracy of left ventricular mechanical dyssynchrony indices for mechanical characteristics of left bundle branch block using cardiovascular magnetic resonance 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). We compared the LV dyssynchrony classification accuracy of two commonly available CMR indices in a study population of patients with severely reduced LV ejection fraction and no scar, and either LBBB or normal conduction (normal QRS duration and axis, controls).We retrospectively identified 80 patients from three centers, with LV ejection fraction <=35%, no scar by CMR late gadolinium enhancement, and either normal electrocardiographic QRS duration (<120ms) and normal frontal plane electrical axis (-30 to +90 degrees) (control, n=36), or LBBB by Strauss’ criteria (LBBB, n=44).Provided is the image data and analysis code to reproduce all aspects of the current study.Datasets with original and delineated CMR exams can be found in the provided zip archive.Please see the README.docx document provided above for more details.