Values of new-onset right bundle branch block in patients receiving transcatheter aortic valve replacement

Transcatheter aortic valve replacement (TAVR) is a revolutionized treatment for severe aortic valve stenosis. Although new and improved TAVR devices are constantly being developed, cardiac conduction abnormalities post-TAVR requiring permanent pacemaker implantation (PPMI) still occur frequently. Previously, pre-existing right bundle branch block (RBBB) has been shown to be predictive of PPMI after TAVR, while occurrence of new left bundle branch block (LBBB) was associated with a higher rate of PPMI. However, less attention has been paid to the clinical values of new-onset RBBB post-TAVR. To our knowledge, this is the first report focus on the association of new-onset RBBB and PPMI after TAVR. Sometimes only changes in the right bundle branch can be detected, but the patient may have co-existing severe conduction block at this time, which caused adverse events including Adams-Stokes syndrome. New-onset RBBB post-TAVR may also have important clinical implications.