Early repolarization pattern on ECG predicts worse outcomes in patients hospitalized due to chronic heart failure decompensation

•The early repolarization pattern may be utilized as a powerful predictor.•The early repolarization pattern is associated with worse outcomes.•Electrocardiography has great potential in chronic heart failure prognostication.•Impedance cardiography and electrocardiography combine for higher predictive values.•Electrocardiography is still the cornerstone in diagnosis and outcome prediction.