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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 oppdatert av: 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.

Studieoversikt

Status

Har ikke rekruttert ennå

Forhold

Intervensjon / Behandling

Studietype

Intervensjonell

Registrering (Antatt)

124

Fase

  • Ikke aktuelt

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

Studiesteder

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

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

18 år og eldre (Voksen, Eldre voksen)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

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

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Behandling
  • Tildeling: Randomisert
  • Intervensjonsmodell: Parallell tildeling
  • Masking: Enkelt

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Annen: 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.

Annen: 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.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
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
Tiltaksbeskrivelse
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

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Antatt)

1. februar 2027

Primær fullføring (Antatt)

1. mars 2029

Studiet fullført (Antatt)

1. mars 2029

Datoer for studieregistrering

Først innsendt

21. september 2026

Først innsendt som oppfylte QC-kriteriene

21. september 2026

Først lagt ut (Faktiske)

25. september 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

25. september 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

21. september 2026

Sist bekreftet

1. september 2026

Mer informasjon

Begreper knyttet til denne studien

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • FF109

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