3.1 Baseline characteristics
We selected 139 patients who underwent the LBBAP in our hospital between January 2019 and October 2020. Among them, 89 patients with acute myocardial infarction and previous cardiac stent implantation were excluded, leaving 50 patients (27 men) for analysis. As shown in Table 1, 38 patients had atrioventricular block, 4 had sinus syndrome, 4 had ventricular tachycardia, 8 had dilated cardiomyopathy and 4 had hypertrophic cardiomyopathy. The QRS interval after the LBBAP procedure was significantly shorter than that before the procedure(124.9 ± 32.6ms vs 113.4 ± 17.1ms, P<0.05 ).
Table 1 Baseline characteristics of patients.