Permanent Conduction System Pacing Versus Atrioventricular Management for Patients With Wide QRS and Patent AV Conduction
Óscar Cano Pérez
120 participants
Jul 29, 2025
INTERVENTIONAL
Conditions
Summary
Intraventricular conduction delay alone or in combination with AV conduction delay is associated with a dyssynchronous activation of the ventricles and may result in LV function impairment. Conduction system pacing can restore physiologic ventricular activation in the presence of intraventricular and atrioventricular conduction delays. Patients with intraventricular conduction delay alone or in combination with AV conduction delay who have a permanent pacemaker indication due to intermittent bradycardia and have predominantly intact AV conduction may benefit from continuous CSP.
Eligibility
Inclusion Criteria6
- age > 18 years
- Any indication for cardiac pacing with an expected VP burden ≤ 10% after 1- month run-in period
- Baseline wide QRS (≥150 ms) with normal PR or QRS ≥ 130 ms + PR≥230 ms
- LVEF≥50%
- Confirmed CSP criteria
- Signed and dated informed consent
Exclusion Criteria9
- Pregnant woman
- Permanent or long-lasting atrial fibrillation
- Previous PM/ICD
- Unstable angina, acute Myocardial Infarction (MI), Coronary Artery Bypass Graft (CABG), Percutaneous Coronary Angioplasty (PCI), surgical valve repair or replacement within 90 days prior enrollment
- Moderate-severe valvular heart disease (unrepaired)
- Already included in another clinical study that could confound the results of the present study
- Infiltrative disease or any other genetically or acquired primary myocardial disease
- Life expectancy < 2 years
- LVEF <50%
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Interventions
All patients will receive a ventricular lead in the conduction system (HBP or LBBAP) using conventional implant techniques described elsewhere. The pacemaker device and leads should be implanted according to the physician's manual provided with the devices. Only locally approved Medtronic PM generators with MVP algorithms will be used during the study. Investigators will use the Medtronic Select Secure 3830 lead for CSP. Acceptable LBBAP threshold should be \<2,5V@0,5ms. Other commercially available stylet driven leads may be used as bail-out strategy only when CSP cannot be achieved with the 3830 lead at the implanting physician discretion. During the implant procedure lead impedances, pacing and sensing parameters will be measured using a pacing system analyzer (PSA). It is strongly encouraged the designation of a single and experienced CSP implanting physician at each center.
Locations(3)
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NCT07585799