Adaptive Cardiac Resynchronization Therapy Optimization at Rest and During Exercise (AdOPT CRT)
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- Subject is age 18 or greater
- Subject is willing to sign and date the study Informed Consent form
- Subject has been implanted with a clinically indicated CRT-D device (Medtronic Vision 3D or Protecta models) for at least 1 month but less than 7 months from the date of study enrollment
Exclusion Criteria:
- Subject has a history of persistent or permanent AF for which pharmacological therapy and/or cardioversion have been unsuccessful or have not been attempted.
- Subject has atrial or ventricular tachyarrhythmias or frequent atrial or ventricular ectopy at the time of enrollment.
- Subject's resting heart rate at the time of enrollment exceeds 90 bpm.
- Subject had CRT system implanted for more than 7 months from the date of the study enrollment
- Subject has complete AV block.
- Subject had previous mechanical valve surgeries.
- Subject has congenital heart disease.
- Subject has contraindication for an exercise test.
- Subject is unable to perform a sub-maximal exercise test.
- It is not possible to acquire technically acceptable echocardiographic images.
- Subject has medical conditions that would limit study participation.
- Subject is pregnant (all women of child-bearing potential must undergo a pregnancy test within seven days prior to the study visit).
- Subject is enrolled in the Adaptive CRT study
- Subject is enrolled in concurrent studies which could confound the results of this study.
- Subject meets exclusion criteria required by local law
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Behandling
- Tildeling: N/A
- Interventionel model: Enkelt gruppeopgave
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
Eksperimentel: CRT pacing at rest and during exercise
Rest and sub-maximal exercise
|
CRT pacing with aCRT settings and BiV pacing with nominal programming at rest and during submaximal exercise
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Stroke Volume at Rest
Tidsramme: Test day visit (within 14 days of enrollment)
|
Difference in stroke volume (SV) between BiV pacing with aCRT settings and BiV pacing with nominal settings at rest.
Biventricular pacing is a type of pacing that paces both the right and left ventricles of the heart.
Stroke volume is the volume of blood pumped from a ventricle in one heart beat.
|
Test day visit (within 14 days of enrollment)
|
|
Stroke Volume During Atrial Pacing.
Tidsramme: Test day visit (within 14 days of enrollment)
|
Difference in SV between BiV pacing with aCRT settings and BiV pacing with nominal settings during atrial pacing.
Atrial pacing occurs at 20 beats-per-minute (bpm) above the subject's resting heart rate.
|
Test day visit (within 14 days of enrollment)
|
|
Stroke Volume During Sub-maximal Exercise.
Tidsramme: Test day visit (within 14 days of enrollment)
|
Difference in SV between BiV pacing with aCRT settings and BiV pacing with nominal settings during sub-maximal exercise.
Sub-maximal exercise is exercise performed at a level below maximum effort.
The subject will perform sub-maximal exercise to achieve target heart rate close to 75% of the age-predicted maximal heart rate.
|
Test day visit (within 14 days of enrollment)
|
Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Cardiac Function With aCRT Settings at Rest
Tidsramme: Test day visit (within 14 days of enrollment)
|
Difference in blood pressure (BP)-derived and echocardiogram (echo)-derived parameters of cardiac function between BiV pacing with aCRT settings and BiV pacing with nominal settings at rest.
|
Test day visit (within 14 days of enrollment)
|
|
Cardiac Function With Nominal Settings at Rest.
Tidsramme: Test day visit (within 14 days of enrollment)
|
Difference in BP-derived and echo-derived parameters of cardiac function between BiV pacing with nominal settings and intrinsic conduction at rest.
|
Test day visit (within 14 days of enrollment)
|
|
Cardiac Function With aCRT Settings During Sub-maximal Exercise.
Tidsramme: Test day visit (within 14 days of enrollment)
|
Difference in BP-derived and echocardiogram (echo)-derived parameters of cardiac function between BiV pacing with aCRT settings and BiV pacing with nominal settings during sub-maximal exercise.
|
Test day visit (within 14 days of enrollment)
|
|
Cardiac Function With Nominal Settings During Sub-maximal Exercise.
Tidsramme: Test day visit (within 14 days of enrollment)
|
Difference in BP-derived and echo-derived parameters of cardiac function between BiV pacing with nominal settings and intrinsic conduction during sub-maximal exercise.
|
Test day visit (within 14 days of enrollment)
|
|
Electrical Conduction at Rest.
Tidsramme: Test day visit (within 14 days of enrollment)
|
Electrical conduction will be evaluated at rest by measuring the subject's intrinsic atrio-ventricular (AV) interval.
The AV interval is the amount time between the start of atrial contraction and the start of ventricular contraction.
|
Test day visit (within 14 days of enrollment)
|
|
Electrical Conduction During Sub-maximal Exercise.
Tidsramme: Time Frame: Test day visit (within 14 days of enrollment)
|
Electrical conduction will be evaluated during sub-maximal exercise by measuring the subject's intrinsic AV interval.
|
Time Frame: Test day visit (within 14 days of enrollment)
|
Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Studiestol: AdOPT CRT/aCRT Study Team, Medtronic
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- AdOPT CRT Sub Study
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