Cryoballoon vs. Rhythmia Guided Ablation for Recurrent AFib

Cryoballoon vs. Rhythmia Guided Ablation for Recurrent Atrial Fibrillation Following Initial Cryoballoon Pulmonary Vein Isolation

The purpose of this research is to evaluate whether cryoballoon ablation vs. radiofrequency ablation guided by high-fidelity mapping (Rhythmia) is the best treatment strategy to perform repeat ablation for recurrent atrial fibrillation after previously having undergone cryoballoon ablation.

Study Overview

• Status: Completed
• Conditions: Atrial Fibrillation
• Intervention / Treatment: Other: ECG monitoring with a Kardia Mobile monitor

Detailed Description

The study is a randomized, prospective multicenter pilot study to assess the utility and efficacy of high-density mapping with the Rhythmia mapping system to guide PV re-isolation in subjects with recurrent AF after an initial cryoballoon PVI compared to repeat cryoballoon PVI.

After obtaining informed consent to participate in the study, subjects will undergo baseline data bcollection. Subjects will then be randomized to undergo repeat PVI with either cryoballoon ablation or repeat PVI with an IntellaNav Open-Irrigated or other approved ablation catheters for atrial fibrillation under guidance of the Rhythmia mapping system and IntellaMap Orion mapping catheter. The performance of repeat AF ablation, use either the cryoballoon or Rhythmia mapping system, mapping catheter, and ablation catheters are in accordance with standard clinical indications and practice, regardless of participation in the study.

The participants in the study will undergo a total of two follow-up visits after ablation (approximately 3 and 6 months) with a 12-lead electrocardiogram (ECG) at each visit. An assessment of rhythm will be performed with daily transmissions as well as subject-activated event recordings for symptoms with the Kardia Mobile (AliveCor, Mountain View, CA) smartphone based monitor. The Kardia Mobile System is an FDA-cleared, clinical grade mobile ECG monitor coupled with a smartphone app that is able to record a single-lead ECG and securely transmit the tracings to the study investigators via the Kardia Pro commercial (HIPPA compliant) remote monitoring service for clinicians. The transmissions will not be directly available to the treating electrophysiologists at each site.

At the 6 month visit, 2-weeks of continuous monitoring with a Zio XT event monitor (iRhythm, San Francisco, CA) will be performed according to standard clinical practice to evaluate for subclinical episodes of AF.

The goal of the pilot study is to enroll 50 subjects with 1:1 randomization across 3 sites in the Unites States and each subject will be followed for 6 months following ablation to evaluate for recurrence of AF. The estimated time to complete enrollment will be 3-4 months assuming enrollment of at each visit 4-5 subject per month at each site.

• Study Type: Interventional
• Enrollment (Actual): 9
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Iowa
    • West Des Moines, Iowa, United States, 50266
      • Iowa Heart Center
  • New Jersey
    • Paramus, New Jersey, United States, 07652
      • The Valley Hospital
  • Oregon
    • Springfield, Oregon, United States, 97477
      • Peace Health

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 100 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Individuals with paroxysmal or persistent AF undergoing repeat AF ablation as per recent HRS guidelines and standard practice;
• Individuals in whom the initial ablation approach was cryoballoon PVI at the enrolling institution more than 3 month or more prior to the anticipated repeat ablation;
• Age ≥ 18 years.

Exclusion Criteria:

• Individuals with recurrent AF who previously underwent RF-based PVI;
• Individuals with known contraindications to ablation including permanent atrial fibrillation or intolerance of anticoagulation;
• Individuals unable or not willing to complete follow-up visits and examination for the duration of the study;
• Individuals without access to smartphone or tablet compatible with the monitoring system;
• Prior valve surgery or surgical AF ablation;
• Individuals with mental or physical limitations precluding informed consent;
• Individuals currently enrolled in another investigational study or registry;
• Women of childbearing potential who are, or plan to become, pregnant during the time of the study.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Single

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Other: Arm 1-Repeat Cryoballoon Ablation; Subjects will be randomized to repeat cryoballoon ablation.	Other: ECG monitoring with a Kardia Mobile monitor; The participants in the study will undergo a total of two follow-up visits after ablation (approximately 3 and 6 months) with a 12-lead electrocardiogram at each visit. An assessment of rhythm will be performed with daily transmissions as well as subject-activated event recordings for symptoms with the Kardia Mobile smartphone based monitor. The Kardia Mobile System is an FDA-cleared, clinical grade mobile ECG monitor coupled with a smartphone app that is able to record a single-lead ECG and securely transmit the tracings to the study investigators via the Kardia Pro commercial (HIPPA compliant) remote monitoring service for clinicians.
Other: Arm 2-Radiofrequency Ablation; Participants will have radiofrequency ablation guided by high-fidelity mapping (Rhythmia) following an initial cryoballoon ablation.	Other: ECG monitoring with a Kardia Mobile monitor; The participants in the study will undergo a total of two follow-up visits after ablation (approximately 3 and 6 months) with a 12-lead electrocardiogram at each visit. An assessment of rhythm will be performed with daily transmissions as well as subject-activated event recordings for symptoms with the Kardia Mobile smartphone based monitor. The Kardia Mobile System is an FDA-cleared, clinical grade mobile ECG monitor coupled with a smartphone app that is able to record a single-lead ECG and securely transmit the tracings to the study investigators via the Kardia Pro commercial (HIPPA compliant) remote monitoring service for clinicians.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
PrimaryCryoballoon vs. Rhythmia Guided Ablation for Recurrent AFib	The freedom from atrial fibrillation at 6 months is the primary endpoint. The presence or absence of atrial fibrillation will be assessed during the study period.	Six months

Collaborators and Investigators

• Sponsor: Valley Health System
• Investigators: Principal Investigator: Advay Bhatt, MD, The Valley Hosptial

Study record dates

Study Major Dates

• Study Start (Actual): November 27, 2018
• Primary Completion (Actual): April 26, 2022
• Study Completion (Actual): April 26, 2022

Study Registration Dates

• First Submitted: December 20, 2018
• First Submitted That Met QC Criteria: January 18, 2019
• First Posted (Actual): January 22, 2019

Study Record Updates

• Last Update Posted (Actual): June 24, 2026
• Last Update Submitted That Met QC Criteria: June 19, 2026
• Last Verified: June 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Cardiovascular Diseases; Pathologic Processes; Heart Diseases; Arrhythmias, Cardiac; Pathological Conditions, Signs and Symptoms; Atrial Fibrillation
• Other Study ID Numbers: ABCRYO1786

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: Yes