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Detection of Cardiac Amyloidosis Using Right Ventricular Sensing Amplitude in Patients With Left Ventricular Hypertrophy (DETECT-AMY)

27. juli 2026 oppdatert av: Assistance Publique - Hôpitaux de Paris

Diagnostic Performance of Right Ventricular Sensing Amplitude and Other Electrophysiological,Echographic, and Histological Parameters in Cardiac Amyloidosis Among Patients With Left Ventricular Hypertrophy: a Multicenter Prospective Study

This multicenter prospective study aims to evaluate the diagnostic performance of right ventricular sensing amplitude measured during cardiac implantable electronic device (CIED) implantation (pacemaker or defibrillator) to identify cardiac amyloidosis in patients with left ventricular hypertrophy and conduction abnormalities.

Patients aged 65 years or older referred for CIED implantation will be included. During the procedure, electrophysiological parameters will be recorded.

Additional assessments will be performed, including cardiac scintigraphy, biological analyses, and subcutaneous adipose tissue biopsy. The results of these investigations will be used to confirm or rule out cardiac amyloidosis.

Diagnostic performance will be assessed using the area under the receiver operating characteristic curve (AUROC).

Studieoversikt

Status

Har ikke rekruttert ennå

Forhold

Intervensjon / Behandling

Studietype

Intervensjonell

Registrering (Antatt)

242

Fase

  • Ikke aktuelt

Kontakter og plasseringer

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

Studiekontakt

Studer Kontakt Backup

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

  • Eldre voksen

Tar imot friske frivillige

Nei

Beskrivelse

Inclusion Criteria:

  • Patient referred for CIED implantation (pacemaker or Implantable Cardioverter Defibrillator with a pacemaker feature) due to at least one conduction abnormality (Atrioventricular block, Sinoatrial block or Atrial fibrillation with slow ventricular rate). Patients referred for implantation of an Implantable Cardioverter Defibrillator with a pacemaker feature can be included if they present one of these conduction abnormalities.
  • Left ventricular hypertrophy definite as maximal end-diastolic interventricular septum thickness ≥ 12mm
  • Patients aged ≥ 65 years
  • Written consent
  • Patient affiliated to a social security

Exclusion Criteria:

  • Severe aortic stenosis (valve area ≤ 1 cm2)
  • Known cardiac amyloidosis
  • Indication for cardiac resynchronisation therapy
  • Indication for left bundle branch physiological pacing
  • Ejection fraction < 45% on echocardiography.
  • Participation in another interventional study involving human participants or being in the exclusion period at the end of a previous study involving human participants.
  • Patient on AME (state medical aid)
  • Adults subject to a legal protection measure (guardianship, curatorship, or safeguard of justice).
  • Patients deprived of their liberty by a judicial or administrative decision.

Studieplan

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

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Diagnostisk
  • Tildeling: N/A
  • Intervensjonsmodell: Enkeltgruppeoppdrag
  • Masking: Ingen (Open Label)

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Annen: Diagnostic Assessment During CIED Implantation
Single Group
Diagnostisk test: Cardiac amyloidosis screening during CIED implantation

Procedure of CIED implantation will not be modified by inclusion in the study. However, several exams will be performed to confirm or ruled out the diagnosis of cardiac amyloidosis:

During the procedure: Subcutaneous adipose tissue sampling Collection of a subcutaneous adipose tissue sample during device implantation for histological analysis to detect amyloid deposits.

Blood sampling for serum free light chain assay, serum and urine electrophoresis with immunofixation (baseline visit)

Diagnostic Test: 99mTc-DPD or HMDP Scintigraphy Cardiac scintigraphy performed within 3 months after implantation to assess myocardial tracer uptake and detect cardiac amyloidosis.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Area under the receiver operating characteristic curve (AUROC) of the right ventricular sensing amplitude for the identification of patients with cardiac amyloidosis
Tidsramme: During CIED implantation
The area under the receiver operating characteristic curve (AUROC) of the right ventricular sensing amplitude, measured during CIED implantation in patients with conduction abnormalities, for the identification of patients with cardiac amyloidosis.
During CIED implantation

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Diagnostic performance of right atrial sensing amplitude for diagnostic of cardiac amyloidosis
Tidsramme: During hospitalization for CEID implantation (Day 0)
The area under the receiver operating characteristic curve (AUROC) and sensitivity, specificity, positive and negative predictive values, positive and negative likelihood ratios of right atrial sensing amplitude, atrial and ventricular pacing thresholds estimated during CIED implantation for identifying patients with cardiac amyloidosis.
During hospitalization for CEID implantation (Day 0)
Diagnostic performance of atrial pacing thresholds for diagnostic of cardiac amyloidosis
Tidsramme: During hospitalization for CEID implantation (Day 0)
The area under the receiver operating characteristic curve (AUROC) and sensitivity, specificity, positive and negative predictive values, positive and negative likelihood ratios of right atrial sensing amplitude, atrial and ventricular pacing thresholds estimated during CIED implantation for identifying patients with cardiac amyloidosis.
During hospitalization for CEID implantation (Day 0)
Diagnostic performance of ventricular pacing thresholds for diagnostic of cardiac amyloidosis
Tidsramme: During hospitalization for CEID implantation (Day 0)
The area under the receiver operating characteristic curve (AUROC) and sensitivity, specificity, positive and negative predictive values, positive and negative likelihood ratios of right atrial sensing amplitude, atrial and ventricular pacing thresholds estimated during CIED implantation for identifying patients with cardiac amyloidosis.
During hospitalization for CEID implantation (Day 0)
Diagnostic performance of maximal end-diastolic interventricular septal thickness
Tidsramme: During hospitalization for CEID implantation (Day 0)
The area under the receiver operating characteristic curve (AUROC) and sensitivity, specificity, positive and negative predictive values, positive and negative likelihood ratios of maximal end-diastolic interventricular septum thickness at echocardiography for identifying patients with cardiac amyloidosis.
During hospitalization for CEID implantation (Day 0)
Diagnostic performance of adipose tissue histology
Tidsramme: During hospitalization for CEID implantation (Day-0)
The area under the receiver operating characteristic curve (AUROC) and sensitivity, specificity, positive and negative predictive values, positive and negative likelihood ratios of histological analysis of adipose tissue for identifying patients with cardiac amyloidosis.
During hospitalization for CEID implantation (Day-0)
Diagnostic performance of right atrial and ventricular sensing amplitudes and pacing thresholds
Tidsramme: 6 months after CIED implantation (Day 0)
The area under the receiver operating characteristic curve (AUROC) and sensitivity, specificity, positive and negative predictive values, positive and negative likelihood ratios of 12-lead electrocardiogram data (low voltage in limb leads) for identifying patients with cardiac amyloidosis.
6 months after CIED implantation (Day 0)
The implantation procedure duration (min) between patients with or without cardiac amyloidosis
Tidsramme: During CIED implantation
During CIED implantation
The prevalence of cardiac amyloidosis in the study population
Tidsramme: Up to 3 months after CIED implantation
Up to 3 months after CIED implantation
The proportion of modifications in the treatment at the 6-month visit.
Tidsramme: 6 months after CIED implantation
6 months after CIED implantation
Change in RAND 36-Item Health Survey (SF-36) score
Tidsramme: Inclusion and 6 months after CIED implantation
Change in health-related quality of life between inclusion and the 6-month visit, assessed using the RAND 36-Item Health Survey, Version 1.0 (SF-36). The questionnaire comprises 36 items grouped into 8 domains. Each domain score ranges from 0 to 100, with higher scores indicating better health-related quality of life.
Inclusion and 6 months after CIED implantation
Change in New York Heart Association (NYHA) Functional Classification
Tidsramme: Inclusion and 6 months after CIED implantation
Change in New York Heart Association (NYHA) Functional Classification between baseline and the 6-month visit in patients with and without cardiac amyloidosis. The NYHA Functional Classification ranges from Class I to Class IV, with higher class indicating worse functional status.
Inclusion and 6 months after CIED implantation

Samarbeidspartnere og etterforskere

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

Sponsor

Assistance Publique - Hôpitaux de Paris

Etterforskere

  • Studiestol: Philippe Le Corvoisier, MD, PhD, Assistance public Hôpitaux de Paris

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. september 2026

Primær fullføring (Antatt)

1. desember 2029

Studiet fullført (Antatt)

5. mai 2030

Datoer for studieregistrering

Først innsendt

10. juli 2026

Først innsendt som oppfylte QC-kriteriene

27. juli 2026

Først lagt ut (Faktiske)

29. juli 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

29. juli 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

27. juli 2026

Sist bekreftet

1. januar 2026

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • APHP240915

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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