In the lower group (NRG-1 < 122.5 pg/ml), MACCEs were reported in 30 patients, which included 7 individuals hospitalized due to HF, 20 patients with ACS, 1 patient with severe arrhythmia, 1 patient with stroke, and 1 patient who experienced sudden cardiac death. Here, NRG1 is linked to Arrhythmia.