A Comparative Study of the Effect of Atrial Lead Implantation Site on the Rate of Atrial Fibrillation Arrest with Antitachycardia Pacing

Mt FUJI III (clinical iMpacT of atrial lead tip position on the successFUl anti-tachycardia pacing for atrial fibrillation Judged by multicenter prospectIve randomIzed controlled trIal trial-) - A multicenter prospective randomized trial comparing the effect of atrial lead tip position on the rate of atrial fibrillation arrest with antitachycardia pacing. tachycardia pacing for atrial fibrillation Judged by multIcenter prospectIve randomIzed controlled trIal) trial- Mt FUJI III

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-jRCTs042250009

Enrollment

150

Registered

2025-04-15

Start date

2025-04-22

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

sinusoidal failure syndrome

Interventions

On the day of surgery, pacemaker implantation is performed and an atrial lead is placed in the allocated site. Delivery catheter-type leads are used in the high atrial septal implantation group, and s

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. patients over 18 years of age 2. patients undergoing pacemaker implantation for sinus failure syndrome complicated with atrial fibrillation 3. patients with a P wave width of 120 ms or greater as measured by 12-lead ECG 4. Persons who have obtained consent for participation in this study by signing a consent form by themselves or by a proxy.

Exclusion criteria

Exclusion criteria: 1.Patients with persistent atrial fibrillation 2.Patients predicted to be dependent on ventricular pacing 3.Patients with severe left ventricular systolic dysfunction (LVEF <40%) 4.atients with a history of open heart surgery 5.Other patients deemed unsuitable by the principal investigator (subinvestigator)

Design outcomes

Primary

Measure	Time frame
Atrial Fibrillation Arrest Rate with Atrial Antitachycardia Pacing	—

Secondary

Measure	Time frame
Atrial fibrillation lasting more than 1 day Atrial fibrillation lasting more than 7 days Atrial fibrillation lasting more than 30 days Operation time Fluoroscopy time P wave width by pacing	—

Contacts

Public ContactYoshihisa Naruse

Hamamatsu University School of Medicine

ynaruse@hama-med.ac.jp+81-53-435-2356

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026