“…While the role of left bundle branch block (LBBB) as an independent predictor of MACE in patients with AMI is well established, little is known regarding the effects of LBBB in TTS. Notably, a recently published retrospective study showed that the presence of LBBB was associated with ventricular arrhythmias occurring in patients with TTS, thus suggesting a possible value of LBBB in the prognosis of this population [36] . In addition to the low sensitivity of ECG, there is a lack of diagnostic biomarkers that can discriminate patients with TTS from those with AMI, thereby allowing clinical monitoring and providing prognostic information in the long term [37] .…”