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.