Impact of Life-Style Modification On Ablation Outcome in Atrial Fibrillation

  • End date
    Dec 24, 2022
  • participants needed
  • sponsor
    Texas Cardiac Arrhythmia Research Foundation
Updated on 24 January 2021
catheter ablation


This prospective randomized pilot study aims to evaluate the impact of aggressive life style modification in terms of calorie-controlled diet and supervised exercise on outcome of catheter ablation in overweight and obese patients with atrial fibrillation.

Hypothesis: Weight loss and management by adoption of strict diet and exercise regimen improves the chances of freedom from recurrence following catheter ablation.


Objective: To examine the impact of a planned life-style modification program including calorie-controlled diet and supervised exercise before and after the AF ablation on quality of life (QoL) and long-term arrhythmia recurrence in overweight and obese patients with atrial fibrillation.


Primary: AF recurrence following index ablation procedure It will be assessed at 3, 6 and 12 months after the procedure by event recorders, 12-lead ECG and Holter monitoring Any episode of AF/AFL/AT > 30 sec will be considered as a recurrence. Episodes that occur during the first 3 months after the procedure (blanking period) will not be considered as recurrence.

  1. Change in QoL It will be evaluated by a validated AF specific questionnaire (AFEQT) at baseline and 6 and 12 months post-procedure
  2. Change in AF symptom severity. This will be measured by AF symptom severity and burden questionnaire at baseline and 6 and 12 months post-procedure

Participants in the intervention group will receive individual counseling sessions with an experienced dietitian, who will prepare personalized diet plan based on their comorbidities and preferences.

To accomplish weight loss, the diet menu will be planned to reduce daily food intake by 500 calories depending on their baseline body weight.

Patients enrolled in the control group will be provided advice on heart-healthy diet and active life style.


Supervised and monitored exercise will be conducted in St. David's Cardiac Rehabilitation for 3 months starting before or 7-10 days after the ablation.

After ablation, patients will continue individualized home-exercise program for 1 year.

QoL Survey:

The AF Effect on Quality of Life survey (AFEQT) questionnaire will be used at baseline and 6 and 12 months post procedure.

Symptom Severity Survey:

This will be measured by AF symptom severity and burden questionnaire at baseline and 6 and 12 months post-procedure

Condition Arrhythmia, Dysrhythmia, Arrhythmia, Atrial Fibrillation, Atrial Fibrillation, Atrial Fibrillation (Pediatric), adiposity, Obesity, Obesity, Atrial Fibrillation (Pediatric), Dysrhythmia
Treatment radiofrequency catheter ablation
Clinical Study IdentifierNCT02219841
SponsorTexas Cardiac Arrhythmia Research Foundation
Last Modified on24 January 2021


Yes No Not Sure

Inclusion Criteria

Age: > 18 years
AF patient undergoing first catheter ablation, at least 3 months after the enrollment
BMI: 26-40
Willing to be compliant with the weight-reduction program
Willing to provide informed, written consent

Exclusion Criteria

Chronic obstructive lung disease (COPD)
Participation in another weight loss program in < 3 months
Musculoskeletal conditions limiting exercise capacity
Insulin-dependent diabetes
Severe valvular heart disease or cardiomyopathy
Heavy drinking (>14 standard drinks/week for men and >7/ week for women)
Inability to provide informed consent
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Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

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If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

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