Pacing to Maintain Physiologic Ventricular Activation

NCT ID: NCT04416958

Last Updated: 2024-10-15

Basic Information

• Recruitment Status: RECRUITING
• Total Enrollment: 200 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2018-01-01
• Study Completion Date: 2030-12-31

Brief Summary

Right ventricular pacing causes ventricular dyssynchrony and may be associated with impaired outcome. In the last decade, several approaches for more physiological pacing became available and were implemented in the latest guidelines. However, compared to conventional device implantation, cardiac resynchronization, His bundle pacing and left bundle area pacing remain demanding procedures in the individual case. Goal of the single center observational "Pace conduct" study is to evaluate implantation success, safety and outcome of pacing methods that maintain physiologic ventricular activation.

Detailed Description

Background:

Conventional ectopic myocardial right ventricular pacing (RVP) causes ventricular dyssynchrony and may be associated with reverse ventricular remodeling, reduced ejection fraction (EF), left ventricular dilatation, functional mitral valve regurgitation, heart failure and an increased rate of new onset atrial fibrillation.

Dependent on individual patient's characteristics, several strategies are established to prevent and to overcome the potential drawbacks of chronic RVP. In general, unnecessary ectopic RVP should be avoided. For example, in patients with sinus node disease and intact atrioventricular (AV) conduction, atrial pacing, AV (search) hysteresis or AAI-DDD/ADI pacing may be used. In patients with impaired cardiac function and an expected higher percentage of RVP, pacing strategies for cardiac resynchronization are indicated. Conventional cardiac resynchronization therapy (CRT) uses an additional transvenous left ventricular lead for synchronous ventricular stimulation and was shown to shorten QRS duration and to reduce morbidity and mortality in patients with chronic heart failure, left bundle branch block (LBBB) and reduced EF. Due to the non-physiological left ventricular epicardial stimulation, however, conventional CRT is associated with 30% of non-responders and may even prolong ventricular activation in patients with narrower QRS complex. First described in 1968, His bundle pacing (HBP) has evolved to an increasingly used alternative for cardiac pacing. Currently, HBP is regarded the most physiologic approach for ventricular stimulation because it prevents ventricular dyssynchrony and its potential fatal long-term consequences by preserving normal electrical activation of the ventricles. Clinical benefit of HBP has been shown compared with conventional permanent RVP and CRT. Recent studies documented restoration of normal electrical and mechanical left ventricular synchrony for both selective and non-selective HBP. However, compared with conventional RVP the implantation procedure for HBP is much more demanding requiring exact placement of the pacing lead within the anatomically variable His bundle area. Alternatively, the correction of bundle branch conduction disorders has been demonstrated for left bundle branch area (LBBA) pacing. As a consequence, current guidelines recommend pacing methods that maintain physiologic ventricular activation in patients with atrioventricular block who have an indication for permanent pacing with a LVEF between 36% and 50% and are expected to require ventricular pacing more than 40% of the time (class IIa indication).

In summary, there is increasing evidence showing the benefits of the different strategies for physiologic pacing but the appropriate use of these approaches may be challenging in the individual case. Therefore, appropriate patient selection, implantation approaches, device programming and follow-up require further intensive evaluation.

Objective:

Main goal of the study is to evaluate implantation success for pacing methods aiming to maintain physiologic ventricular activation. Procedural success is defined as stable lead positioning and effective pacing within the target area with an appropriate and stable pacing threshold.

Secondary goals of the study are to document and to evaluate

• procedural parameters (e.g. venous access, time needed for lead implant, procedural duration, radiation) and adverse events dependent on procedural approaches and patients characteristics,
• performance of the implanted system (sensing, pacing thresholds) and clinical outcome during routine follow-up

Study design:

Single center, non-randomized, observational study, retrospective data analysis, on-going prospective patient enrollment, descriptive statistics.

Center: Klinikum Fuerth (Dept. for Heart and Lung diseases, section for clinical electrophysiology) / Germany in cooperation with the Dept. of Cardiology of the University Erlangen / Germany and the University of Trieste / Italy.

Patients and methods:

Primary endpoint: Implantation success. Effective pacing and acceptable pacing threshold at the targeted lead position. Target for lead placement is the area with maximum delayed ventricular activation for transvenous CRT, the His bundle for selective or non-selective HBP and the right interventricular septum with left bundle branch capture for LBBA pacing, respectively. Target thresholds for the lead placed within the coronary sinus or at the intrinsic conduction system is <2.5 V @ 1 ms with a maximum acceptable threshold of <4.0 V @ 2 ms or <5 V @ 1 ms. Target for all other leads is <1 V @ 0.5 ms.

Secondary endpoints: patient characteristics and association with outcome. Implantation success and outcome correlated with patient characteristics including electrocardiogram and echocardiographic parameter and procedure related techniques and parameter. Safety: radiation exposure, number and type of adverse events and adverse device related events. Follow-up: device function, interrogation, programming and clinical outcome as evaluated in routine follow-up, incl. ECG, echocardiography and parameter for assessment of heart failure. Subpopulations: managed ventricular pacing, His bundle pacing, LBB-area pacing, CRT. Implantation with or without electroanatomic mapping system.

Inclusion criteria:

Implantation of a pacemaker or ICD according to the current guidelines (Class I or IIa indication) aiming to avoid pacing induced dyssynchrony, e.g. managed ventricular pacing, His-bundle pacing, LBB-area pacing or conventional transvenous CRT. Age ≥ 18 years.

Exclusion criteria:

No given informed consent for the procedure. No follow up data available.

Sample size:

For the observational study, there is no pre-specified sample-size. Data from 200 patients and procedures are expected.

Data security:

Study related data are collected by the study investigators in an anonymous clinic-internal data-base that is password protected. All investigators have to provide valid GCP training.

Risk estimation:

The study is observational and descriptive with anonymized data collection and data analysis. Therefore, the study adds no risk to the study population.

Ethics:

The "Pace-Conduct" study has been approved by the responsible ethics committee of the Friedrich- Alexander University Erlangen, Germany (145_20 Bc)

Conditions

Pacemaker DDD; His Bundle Pacing; LBB Area Pacing; Pacing-Induced Cardiomyopathy; Left Bundle-Branch Block; ICD

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: PROSPECTIVE

Study Groups

CIED for cardiac resynchronisation

Patients implanted with an CIED for cardiac resynchronisation aiming to avoid pacing induced ventricular dyssynchrony, e.g. His bundle pacing, LBB-area pacing, CRT. These different implanted types of devices may be further analysed as subgroups.

cardiac implantable electronic device (CIED) implantation

Intervention Type: DEVICE

CIED Implantation according to the Guidelines aiming to avoid pacing induced dyssynchrony

Interventions

cardiac implantable electronic device (CIED) implantation

CIED Implantation according to the Guidelines aiming to avoid pacing induced dyssynchrony

Intervention Type: DEVICE

Eligibility Criteria

Inclusion Criteria

• Pacemaker or ICD Implantation aiming to avoid pacing induced ventricular dyssynchrony according to current guidelines
• age >= 18 years

Exclusion Criteria

• no informed consent for the procedure given
• no follow-up data

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

University of Erlangen-Nürnberg

OTHER

Sponsor Role: collaborator

University of Trieste

OTHER

Sponsor Role: collaborator

Klinikum-Fuerth

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Dirk Bastian, MD

Role: PRINCIPAL_INVESTIGATOR

Klinikum-Fuerth

Locations

Klinikum Fuerth

Fürth, Bavaria, Germany

Site Status: RECRUITING

Countries

Germany

Central Contacts

Dirk Bastian, MD

Role: CONTACT

dirk.bastian@klinikum-fuerth.de

+49 911 7580 1101

Laura Vitali-Serdoz, MD

Role: CONTACT

laura.vitali-serdoz@klinikum-fuerth.de

+49 911 7580 1101

Facility Contacts

Dirk Bastian, MD

Role: primary

dirk.bastian@klinikum-fuerth.de

+49 (0)911 7580 1101

Laura Vitali-Serdoz, MD

Role: backup

laura.vitali-serdoz@klinikum-fuerth.de

+49 (0)911 7580 1101

References

Bastian D, Gregorio C, Buia V, Walaschek J, Rittger H, Vitali-Serdoz L. His bundle pacing guided by automated intrinsic morphology matching is feasible in patients with narrow QRS complexes. Sci Rep. 2022 Mar 4;12(1):3606. doi: 10.1038/s41598-022-07516-6.

Reference Type: DERIVED

PMID: 35246595 (View on PubMed)

Other Identifiers

Pace_Cond_KHF

Identifier Type: -

Identifier Source: org_study_id