heart electrical conduction measurement QRS duration EFO:0005055 2010-06-17T12:40:13Z EFO:0007928 VT:2000017 mshimoyama The time from start to finish of the QRS interval as calculated from a set of measurements taken from the beginning of the QRS complex to the end of the QRS complex representing the time it takes for ventricles to depolarize. ventricular rate measurement CMO:0000267 clinical_measurement_ontology