Pre-Existing Left Bundle Branch Block and Clinical Outcomes After Transcatheter Aortic Valve Replacement

Overview

Journal JACC Asia

Date 2024 Apr 25

PMID 38660100

Authors

Tetsuya Saito

Taku Inohara

Hikaru Tsuruta

Fumiaki Yashima

Hideyuki Shimizu

Keiichi Fukuda

Yohei Ohno

Hidetaka Nishina

Masaki Izumo

Masahiko Asami

Toru Naganuma

Kazuki Mizutani

Masahiro Yamawaki

Norio Tada

Futoshi Yamanaka

Shinichi Shirai

Masahiko Noguchi

Hiroshi Ueno

Kensuke Takagi

Yusuke Watanabe

Masanori Yamamoto

Kentaro Hayashida

Affiliations

Soon will be listed here.

Abstract

Background: Few reports on pre-existing left bundle branch block (LBBB) in patients undergoing transcatheter aortic valve replacement (TAVR) are currently available. Further, no present studies compare patients with new onset LBBB with those with pre-existing LBBB.

Objectives: This study aimed to investigate the association between pre-existing or new onset LBBB and clinical outcomes after TAVR.

Methods: Using data from the Japanese multicenter registry, 5,996 patients who underwent TAVR between October 2013 and December 2019 were included. Patients were classified into 3 groups: no LBBB, pre-existing LBBB, and new onset LBBB. The 2-year clinical outcomes were compared between 3 groups using Cox proportional hazards models and propensity score analysis to adjust the differences in baseline characteristics.

Results: Of 5,996 patients who underwent TAVR, 280 (4.6%) had pre-existing LBBB, while 1,658 (27.6%) experienced new onset LBBB. Compared with the no LBBB group, multivariable Cox regression analysis showed that pre-existing LBBB was associated not only with a higher 2-year all-cause (adjusted HR: 1.39; 95% CI: 1.06-1.82; 0.015) and cardiovascular (adjusted HR: 1.60; 95% CI: 1.04-2.48; 0.031) mortality, but also with higher all-cause (adjusted HR: 1.43, 95% CI: 1.07-1.91; 0.016) and cardiovascular (adjusted HR: 1.81, 95% CI:1.12-2.93; 0.014) mortality than the new onset LBBB group. Heart failure was the most common cause of cardiovascular death, with more heart failure deaths in the pre-existing LBBB group.

Conclusions: Pre-existing LBBB was independently associated with poor clinical outcomes, reflecting an increased risk of cardiovascular mortality after TAVR. Patients with pre-existing LBBB should be carefully monitored.

Citing Articles

Left Bundle Branch Block in Aortic Stenosis: Implications Beyond Pacemaker Implantation.

Tamargo M, Gutierrez-Ibanes E JACC Asia. 2024; 4(4):320-322.

PMID: 38660102 PMC: 11035939. DOI: 10.1016/j.jacasi.2024.01.006.

Impact of New-Onset Right Bundle-Branch Block After Transcatheter Aortic Valve Replacement on Permanent Pacemaker Implantation.

Kikuchi S, Minamimoto Y, Matsushita K, Cho T, Terasaka K, Hanajima Y J Am Heart Assoc. 2024; 13(9):e032777.

PMID: 38639357 PMC: 11179913. DOI: 10.1161/JAHA.123.032777.

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