# Successful Cardiac Resynchronization Therapy With Defibrillator Implantation in a Patient With Isolated Dextrocardia and Situs Inversus Totalis: Role of High‐Resolution Three‐Dimensional Computed Tomography in Procedural Planning

## TL;DR

A patient with rare heart and organ positioning successfully underwent a complex heart procedure using detailed 3D imaging for planning.

## Contribution

Demonstrates the critical role of 3D CT in guiding CRT-D implantation in patients with dextrocardia and situs inversus.

## Key findings

- 3D-CT identified a suitable vein for lead placement in a patient with dextrocardia and situs inversus.
- Right-sided CRT-D implantation achieved optimal lead positioning and biventricular pacing.
- Preprocedural anatomical planning is essential for complex congenital cases.

## Abstract

Preprocedural 3D‐CT identified a suitable posterolateral coronary vein in a patient with dextrocardia and situs inversus. Right‐sided CRT‐D implantation guided by 3D imaging achieved optimal lead positioning and biventricular pacing, underscoring the importance of preprocedural anatomical planning in complex congenital settings.