“…However, it has been reported that an ECG shows abnormalities in only 3.2% to 8.6% of patients with clinically silent CS [1]. fQRS appears as multiple spikes within the QRS complex and has been reported to be associated with ventricular arrhythmic events (VAEs) in patients with myocardial infarction, Brugada syndrome, and hypertrophic cardiomyopathy [9][10][11]. However, the significance of fQRS in cardiac sarcoidosis has not been fully elucidated.…”