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A Comparison of Left Bundle Branch Optimized Cardiac Resynchronization Therapy vs Left Bundle Branch Area Pacing Alone (LOT or NOT)

21. september 2026 opdateret af: PD Dr. Guram Imnadze

Left bundle branch area pacing (LBBAP) has emerged as a promising physiological pacing strategy and may offer advantages over conventional biventricular pacing (BVP), including improved clinical outcomes. However, its effectiveness may be limited in patients with distal conduction system disease, significant endocardial and/or myocardial damage, as well as when direct left bundle branch capture is not achieved. Conventional CRT remains an effective therapy but is associated with procedural challenges and a significant non-responder rate. Current guidelines support the use of LBBAP and BVP either individually or in combination as Left Bundle Branch Optimized CRT (LOT-CRT). Recent data suggest that LOT-CRT may provide superior electrical and hemodynamic resynchronization compared with both LBBAP and BVP. However, there is a lack of randomized trials comparing LBBAP and LOT-CRT in patients with CRT-P indication. The aim of this study is to compare the LOT-CRTP to LBBAP alone.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

124

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

    • Brandenburg
      • Neuruppin, Brandenburg, Tyskland, 16816
        • University Hospital Ruppin-Brandenburg
        • Kontakt:
          • Guram Imnadze, MD, PhD
          • Telefonnummer: +493391393111
          • E-mail: imnadze@web.de

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år og ældre (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

Age ≥ 18 years Clinical indication for CRTP implantation according to the current ESC guidelines De novo implantation LBBB (QRS duration ≥130 ms) NYHA II-IV

Exclusion Criteria:

Severe mitral or aortic valvular disease History of VT/VF Failed implantation of any component of the LOT-CRTP system/ incompleteness of the system to be implanted Pregnancy Life expectancy < 1 year Inability to give written consent

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Enkelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Andet: LOT group

LOT group: Implanted with LOT-CRT-P device and programmed with maximum RV-LV synchronization with narrowest QRS complex on the 12-lead ECG.

Device: LOT-CRT-P (Programming: LOT-CRT-P) All patients will receive implantation of LOT-CRT-P system consisting of a CRT-P device, CSP lead placed in the LBBAP position in the right ventricle (instead of conventional RV lead), LV lead placed in the coronary sinus, and right atrial lead.

Device programming:

LOT group: Pacing with maximum RV-LV synchronization with narrowest QRS complex on the 12-lead ECG.

After 12 months and study end, each patient receives a personalised and optimally tailored adjustment.

Andet: NOT group (LBBAP)

NOT group: Implanted with LOT-CRT-P device and programmed with LBBAP only along with the backup pacing of LV lead with RV-LV delay of 80-100ms.

All patients will receive implantation of LOT-CRT-P system consisting of a CRT-P device, CSP lead placed in the LBBAP position in the right ventricle (instead of conventional RV lead), LV lead placed in the coronary sinus, and right atrial lead.

Device programming:

NOT group: Synchronized with LBBAP only along with the backup pacing of LV lead with RV-LV delay of 80-100ms.

After 12 months and study end, each patient receives a personalised and optimally tailored adjustment.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Clinical Status
Tidsramme: From enrollment to 12 month follow up

Hierarchical clinical composite score: 1. Patients who died for a cardiovascular cause, received a heart transplantation or had an unplanned emergency department visit or hospitalization for heart failure are 'unchanged/worsened'.

2. Patients who receive a modification of the implanted CRTP system for reasons of presumed inefficacy of the randomized system are 'unchanged/worsened'.

3. Patients to whom the above does not apply and who have >20% absolute increase in LVEF at 12 months or earlier are 'markedly improved', and patients who have <5% absolute increase in LVEF at 12 months are 'unchanged/worsened' 4. Patients to whom the above does not apply the KCCQ-12 overall summary score will be assessed. Those who have ≥ 5 points increase in KCCQ-12 overall summary score are 'markedly improved', and patients who have ≥5 points decrease are 'unchanged/worsened'.

5. Patients for whom none of the conditions above apply, are 'moderately improved'.

From enrollment to 12 month follow up

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Electrocardiographic characteristics
Tidsramme: enrollment to 12 month follow up

ECG: QRS duration, assessment of LV lateral wall activation time and LV lateral wall to RV septal activation time.

enrollment to 12 month follow up
Echocardiographic characteristics
Tidsramme: enrollment to 12 month follow up

left ventricular ejection fraction (LVEF), left ventricular end-systolic/ end-diastolic volume (LVESV/LVEDV), LV EDD, LV ESD.

enrollment to 12 month follow up
NYHA class
Tidsramme: enrollment to 12 month follow up
enrollment to 12 month follow up
NT-ProBNP
Tidsramme: enrollment to 12 month follow up
enrollment to 12 month follow up
6 minutes walking test
Tidsramme: enrollment to 12 month follow up
enrollment to 12 month follow up
Quality of Life Questionaire
Tidsramme: enrollment to 12 month follow up

KCCQ-12

enrollment to 12 month follow up
Worsened heart failure
Tidsramme: enrollment to 12 month follow up
enrollment to 12 month follow up
Arrhythmic events
Tidsramme: enrollment to 12 month follow up

VT/VF/AF occurrence

enrollment to 12 month follow up
Mortality
Tidsramme: enrollment to 12 month follow up
enrollment to 12 month follow up

Samarbejdspartnere og efterforskere

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Sponsor

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

1. februar 2027

Primær færdiggørelse (Anslået)

1. marts 2029

Studieafslutning (Anslået)

1. marts 2029

Datoer for studieregistrering

Først indsendt

21. september 2026

Først indsendt, der opfyldte QC-kriterier

21. september 2026

Først opslået (Faktiske)

25. september 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

25. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

21. september 2026

Sidst verificeret

1. september 2026

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • FF109

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