Outcomes of High Power Application in Catheter Ablation of Paroxysmal Atrial Fibrillation Guided by Unipolar Signal Modification.
Pulmonary vein isolation (PVI) is the cornerstone of catheter ablation procedures in patients with paroxysmal atrial fibrillation (PAF) [1]. However, the incidence of atrial fibrillation (AF) recurrence remains high [2], mostly due to pulmonary vein (PV) reconnection [1], emphasizing the formation of transmural lesions to achieve complete conduction block along the ablation lines [3].
Previous studies have shown that elimination of the negative component of the unipolar electrogram (UP-EGM) during radiofrequency applications reflects transmural lesions. The persistence of such a negative component consistently corresponds to non-trans mural lesions [4].
Studieoversikt
Status
Status
Forhold
Forhold
Intervensjon / Behandling
Intervensjon / Behandling
Detaljert beskrivelse
Pulmonary vein isolation (PVI) is the cornerstone of catheter ablation procedures in patients with paroxysmal atrial fibrillation (PAF) [1]. However, the incidence of atrial fibrillation (AF) recurrence remains high [2], mostly due to pulmonary vein (PV) reconnection [1], emphasizing the formation of transmural lesions to achieve complete conduction block along the ablation lines [3].
Previous studies have shown that elimination of the negative component of the unipolar electrogram (UP-EGM) during radiofrequency applications reflects transmural lesions. The persistence of such a negative component consistently corresponds to non-trans mural lesions [4].
The high-power short duration (HPSD) RF application applies to all RF energies delivered at more than 40 W [5]. Higher the power more is the resistive heating causing wider tissue injury [5]. The lesion size with HPSD is larger in width but lesser in depth compared to lower powers with longer duration [5]. In contrast, RF applications of lower power and longer duration result in larger dissipation of RF energies deep into the tissues due to conductive heating causing tissue destruction at greater depths [6]. Hence, there is a risk of collateral tissue damage [5].
HPSD ablation has been advocated as a means to minimize the risk of collateral organ damage as the lesions are smaller in depth. However, Maintaining a high power for a constant duration in the absence of a guide may not be the right strategy [5].
Unipolar waveform modification by complete elimination of the negative component may serve as a guide for HPSD ablation [5].
Studietype
Studietype
Registrering (Forventet)
Registrering
Fase
Fase
- Ikke aktuelt
Deltakelseskriterier
Kvalifikasjonskriterier
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
Tar imot friske frivillige
Kjønn som er kvalifisert for studier
Beskrivelse
Inclusion Criteria:
- Paroxysmal atrial fibrillation
Exclusion Criteria:
- Age< 18 or > 80 years old,
- Atrium (LA) diameter > 50 mm,
- The presence of a mechanical mitral valve prosthesis,
- Left ventricular ejection fraction < 40%,
- Abnormal thyroid function,
- Contraindication to anticoagulant therapy,
- Current malignancy,
- Prior catheter or surgical AF ablation.
Studieplan
Hvordan er studiet utformet?
Designdetaljer
- Primært formål: Behandling
- Tildeling: Randomisert
- Intervensjonsmodell: Parallell tildeling
- Masking: Enkelt
Antall våpen
Våpen og intervensjoner
Deltakergruppe / ArmDeltakergruppe / Arm |
Intervensjon / BehandlingIntervensjon / Behandling |
|---|---|
|
Aktiv komparator: Standard power application
|
Standard power application
|
|
Aktiv komparator: High power application
|
Radiofrequency delivery was performed in a point-by point fashion and continuously (an inter-lesion distance of 6 mm) with 50 W and 70 W and the ablation time for each point is limited to 7s and repeated if needed till the Unipolar signal modification turn to complete positive R wave.
|
Hva måler studien?
Primære resultatmål
Primære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
Ablation success at 6-month after the index procedure
Tidsramme: 6 months
|
Ablation success is defined as no recurrence with no anti-arrhythmic drugs by taking history of symptoms from the patient and by Holter 48 Hours.
|
6 months
|
Samarbeidspartnere og etterforskere
Sponsor
Sponsor
Publikasjoner og nyttige lenker
Studierekorddatoer
Studer hoveddatoer
Studiestart (Forventet)
Studiestart
Primær fullføring (Forventet)
Primær fullføring
Studiet fullført (Forventet)
Studiet fullført
Datoer for studieregistrering
Først innsendt
Først innsendt
Først innsendt som oppfylte QC-kriteriene
Først innsendt som oppfylte QC-kriteriene
Først lagt ut (Faktiske)
Først lagt ut
Oppdateringer av studieposter
Sist oppdatering lagt ut (Faktiske)
Sist oppdatering lagt ut
Siste oppdatering sendt inn som oppfylte QC-kriteriene
Siste oppdatering sendt inn som oppfylte QC-kriteriene
Sist bekreftet
Sist bekreftet
Mer informasjon
Begreper knyttet til denne studien
Ytterligere relevante MeSH-vilkår
Andre studie-ID-numre
Andre studie-ID-numre
- atrial fibrillation ablation
Plan for individuelle deltakerdata (IPD)
Planlegger du å dele individuelle deltakerdata (IPD)?
Legemiddel- og utstyrsinformasjon, studiedokumenter
Studerer et amerikansk FDA-regulert medikamentprodukt
Studerer et amerikansk FDA-regulert enhetsprodukt
Denne informasjonen ble hentet direkte fra nettstedet clinicaltrials.gov uten noen endringer. Hvis du har noen forespørsler om å endre, fjerne eller oppdatere studiedetaljene dine, vennligst kontakt register@clinicaltrials.gov. Så snart en endring er implementert på clinicaltrials.gov, vil denne også bli oppdatert automatisk på nettstedet vårt. .