# Acute Cardiac Tamponade During Multiple Electrical Pre‐Mappings for Atrial Leadless Pacemaker Implantation

## TL;DR

A rare case of cardiac tamponade occurred during multiple electrical pre-mappings for a leadless pacemaker implant in a low BMI patient.

## Contribution

Highlights the risk of cardiac tamponade with repeated electrical pre-mapping during ALPI.

## Key findings

- Cardiac tamponade occurred during multiple pre-mapping attempts in a low BMI patient.
- Single-attempt deployment is recommended to reduce tamponade risk.

## Abstract

Although cardiac tamponade during atrial leadless pacemaker implantation (ALPI) is rare, we encountered such an incident in a female patient with a lower body mass index during multiple pre‐mapping attempts. During ALPI, operators should aim for successful single‐attempt deployment using electrical pre‐mapping as few times as possible to prevent cardiac tamponade.