Leadless left ventricular endocardial pacing: a real alternative or a luxury for a few?

In the May 2017 issue of JACC Reddy et al. (1) reported the results of a prospective multicenter non-randomized study (SELECT-LV), assessing the safety and the performance of biventricular pacing obtained with a wireless, ultrasound (US) based, left ventricular (LV) endocardial system (WiSE-CRT; EBR system, Sunnyvale, California, USA).