The application of fluoroscopic criteria to define leadless pacemakers implant position and the effect of location on device performance.

Emphasis on the safety and reliability of the leadless pacemakers in a real-world setting.Establishing the variation in the implantation sites for leadless pacemakers and reporting the effect of the implantation sites on the devices' performance.We propose a simple, reproducible way of defining the LP location which can help standardise the assessment of the device location sites across LP implantation centres.