Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2022 Apr 28;11(9):2483. doi: 10.3390/jcm11092483

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

Twelve-lead surface electrocardiogram and intracardiac electrogram (EGM) during intrinsic rhythm, unipolar LBBA pacing, and RVA pacing (A). Ideal location of LBBA shows a wide “W” shape QRS complex in V1 lead (red circle). Contrast injection (B) and echocardiography (C) showing the pacing lead tip implanted into the interventricular septum. After implantation of the LBBA pacing system (D), much narrower QRS duration was achieved by LBBA pacing (Left), compared with RVA pacing (Right) in the same patient (E). LBBA, left bundle branch area; LVAT, left ventricular activation time; QRSD, QRS duration; RVA, right ventricular apex; LV, left ventricle.