The Left Bundle Cardiac Resynchronization Therapy Trial
Left Bundle-Branch Block, Heart Failure, Impaired Left Ventricular Function
About this trial
This is an interventional treatment trial for Left Bundle-Branch Block focused on measuring cardiac resynchronization therapy, conduction ssystem pacing
Eligibility Criteria
Inclusion Criteria:
- age > 18 years
- Class I or IIa indication for CRT according to current ESC or ACC/AHA/HRS guidelines
- left bundle branch block according to Strauss criteria
- Signed and dated informed consent
Exclusion Criteria:
- Pregnant woman
- Permanent or long-lasting atrial fibrillation
- Previous CRT device
- Previous PM/ICD with ventricular pacing > 10%
- Conventional pacemaker indication
- Nonspecific IVCD (intraventricular conduction delay)
- Unstable angina, acute Myocardial Infarction (MI), Coronary Artery Bypass Graft (CABG), Percutaneous Coronary Angioplasty (PCI), valve repair or replacement within 90 days prior enrollment
- Indication for valve repair or replacement
- Already included in another clinical study that could confoud the results of the present study
- Life expectancy < 12 months
Sites / Locations
- Hospital Universitario de BellvitgeRecruiting
- Hospital Universitario Puerta De HierroRecruiting
- Hospital General Universitario de Alicante Doctor BalmisRecruiting
- Hospital Universitario Virgen de las NievesRecruiting
- Hospital Universitario San CecilioRecruiting
- Hospital Universitario Juan Ramón JiménezRecruiting
- Hospital 12 OctubreRecruiting
- Hospital Universitario Virgen de la ArrixacaRecruiting
- Hospital Universitari i Politècnic La FeRecruiting
- Hospital Clínico Universitario Lozano BlesaRecruiting
Arms of the Study
Arm 1
Arm 2
Experimental
Active Comparator
Cardiac resynchronization therapy (CRT) obtained by stimulating the left branch area
Cardiac resynchronization therapy (CRT) obtained by biventricular pacing
The CRT-P/CRT-D device and leads should be implanted according to the physician's standard practice. Only locally approved Medtronic CRT-P/CRT-D generators will be used during the study. It is strongly encouraged the designation of a single and experienced implanting physician at each center for the LBBAP implant procedures. During the implant procedure lead impedances, pacing and sensing parameters will be measured using a pacing system analyzer (PSA). For LBBAP, the Medtronic 3830 lead will be used. Acceptable LBBAP threshold should be <2,5V@0,5ms.
The CRT-P/CRT-D device and leads should be implanted according to the physician's manual provided with the devices. Only locally approved Medtronic CRT-P/CRT-D generators will be used during the study. Investigators may use any market approved right atrial (RA) pace/sense lead, right ventricular (RV) pacing/defibrillator lead with pace/sense capabilities and any market approved unipolar/bipolar/quadripolar LV pacing lead. During the implant procedure lead impedances, pacing and sensing parameters will be measured using a pacing system analyzer (PSA). The LV lead should be implanted at a lateral or posterolateral CS branch in a basal or mid ventricular position confirmed by ortogonal fluoroscopic views (RAO and LAO 40º). Acceptable LV pacing threshold should be <3V@0,5ms and phrenic nerve stimulation (PNS) margin should be >1V with respect to the pacing threshold