Percutaneous closure of a 'whale tail' left atrial appendage with a Watchman FLX device and pre-procedural FEops HEARTguide patient-specific computational simulation: a case report.

Percutaneous left atrial appendage (LAA) closure is feasible in the majority of patients. However, certain LAA anatomies may pose substantial technical challenges. This case shows the crucial role of a pre-procedural assessment based on patient-specific computational simulations for LAA closure in difficult scenarios resulting in a more efficient procedure with the optimal result and good clinical outcomes.