# Initial Capture Failure With Delayed Resolution in Atrial Leadless Pacemaker Implantation: A Case of ATTR Amyloidosis With Sinus Node Dysfunction

## TL;DR

A patient with a rare heart condition had initial issues with a pacemaker but improved over time without needing surgery.

## Contribution

Demonstrates successful expectant management of atrial capture failure in ATTR amyloidosis.

## Key findings

- Initial atrial capture failure occurred in a patient with ATTR amyloidosis.
- Delayed threshold improvement was observed without device repositioning.
- Stable injury current and impedance guided successful management.

## Abstract

ATTR amyloidosis patient with initial atrial capture failure showed delayed threshold improvement over time. Stable current of injury and impedance guided expectant management, avoiding unnecessary device repositioning while achieving successful outcomes.