Recurrent transient episodes of left bundle branch block immediately following surgery - A rare phenomenon

{Figure 2} LBBB is associated with disruption of normal conduction through the His–Purkinje system, which manifests as prolonged ventricular depolarisation and widened QRS complexes. The development of new LBBB is a significant clinical event since both the development of LBBB as well as prolongation of the QRS complex >110 ms in the absence of BBB are associated with elevated all-cause mortality. A potential cause could be transient ischemia because of increased intra-thoracic pressure caused by straining against ET tube during reversal and in the postoperative period. [...]no further episode occurred after removal of the endotracheal tube.