We usually use devices algorithms at the time of implantation and hospital discharge. In the majority of cases the automatic algorithms works well to optimize AV and VV intervals. At follow-up (4-6 months), in the case of non-response to CRT (either clinical or echocardiographic) we reprogram the device by means of echocardiography shifting from automatic algorithm to manual (echocardiography-guided) adjustment of the algorithm.

We usually use devices algorithms at the time of implantation and hospital discharge, after 6 months we perform an echocardiographic optimization if necessary (non responder patients).

We usually use devices algorithms at the time of implantation. Sometimes we need echocardiography optimization in those non responder patients.

The first after CRT implantation we use noninvasive thoracic impedance and then at 6 months follow-up in the case of non-response of CRT we optimize by echocardiography.