3.5.2 Serum markers of myocardial injury
Compared with the preoperative period, serum troponin levels in postoperative patients increased to varying degrees but did not reach the level of observed in patients with myocardial infarction; moreover, there was no significant change in the postoperative myocardial enzyme profile. This indicated that the implantation of the LBBAP pacing electrode could damage the coronary veins and some small blood vessels of the heart or myocardial tissue, but without obvious myocardial ischemia or infarction (Table 3).
Table 3 Markers of serum myocardial injury before and after pacemaker implantation.