Comparison of deep ventricular septal pacing and left bundle branch pacing in patients with complete atrial ventricular block
Objective To compare the advantages and disadvantages of two pacing strategies in clinical application by analyzing the deep ventricular septal pacing (DVSP)and left bundle branch pacing (LBBP). Methods A total of 100 patients suffer from complete atrioventricular block (CAVB)were randomly divided into DVSP group and LBBP group,with 50 cases in each group.The implantation depth,QRS duration,fluoroscopy time,intraoperative and postoperative electrical parameters (pacing threshold,ventricular perception,electrode impedance),intraoperative complications,and postoperative cardiac function (left ventricular ejection fraction and NT-proBNP)were compared between the two groups. Results The electrode implantation depth of DVSP group (7.29±0.35)mm was slightly shallower than that of LBBP group (8.00±0.41)mm (P<0.05),QRS duration of DVSP group (119.56±4.65)ms was slightly longer than that of LBBP group (111.72±7.00)ms (P<0.05),and fluoroscopy time of DVSP group (6.30±1.12)was less than that of LBBP group (11.40±2.07)(P<0.05);the pacing threshold of DVSP group was lower than that of LBBP group (P<0.05),and the ventricular perception was better (P<0.05);the incidence of in-traoperative complications in DVSP group was lower than that in LBBP group (P<0.05).After 1 year of follow-up,there was no significant difference in electrical parameters between the two groups (P>0.05),and the cardiac func-tion of the two groups was not significantly negatively affected as well(P>0.05). Conclusion Compared with LBBP,DVSP operation is relatively simpler,which can be used as one of the pacing strategies for patients with ven-tricular pacing dependence.
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