Multi Point Pacing vs. Conventional STUDY PROTOCOL

Inclusion Criteria: * Patients with indication for CRT (-P or -D) as per ESC guidelines. Ability to provide written informed consent. Optimal Medical Therapy for at least 3 months Exclusion Criteria: * \< 18 years and younger * Pregnant or breastfeeding patients * Non-LBBB patients (RBBB, intra-ventricular delay) * Non-ambulatory NYHA class IV effort tolerance * Myocardial infarction within 40 days before enrolment * Cardiac surgery or revascularization procedure within 3 months before enrolment, or scheduled in the following 6 months * Atrial Fibrillation (AF) patients unless AV node ablation is performed, or complete AV block is present (to ensure optimal CRT delivery) * Patients with life expectancy of less than 12 months due to other medical conditions * Patients who are involved in another investigational study (device or medical)