4.1. Limitations
heart failure, supraventricular or ventricular arrhythmias
HEART FAILURE, COLLAPSE
There are some limitations in our study. First, our study is a retrospective single-center study. The conclusions of our study, especially the cutoff value of the index, need to be further verified in larger datasets. Secondly, the DCM patients we included were mainly hospitalized for collapse of heart failure. This group may have limited benefit and cannot represent all the DCM patients. Thirdly, the patients included in our study were in sinus rhythm, thus the conclusions cannot apply to DCM patients with supraventricular or ventricular arrhythmias. Finally, it is not sufficient to exclude the possibility of DCM only based on our algorithm in clinical, yet further need to investigate other etiology of heart failure practically.