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| Name | Class |
|---|---|
| Cardiac Arrhythmia Network of Canada | OTHER |
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This is a study looking at the feasibility of conducting a larger definitive research trial looking at the effectiveness of high intensity interval training in individuals who are scheduled for electro-cardioversion. Usual care for these participants is to go home and continue with their typical daily routine. The investigators will test whether participating in 3-weeks of thrice-weekly high intensity interval training before electro-cardioversion can lengthen the time to recurrence of atrial fibrillation after electro-cardioversion in these individuals. Participants will be asked to come to the University of Ottawa Heart Institute for a baseline visit at which fitness (cycle ergometer), body composition (weight, height, waist circumference and percentage body fat), heart rate variability and habitual exercise levels will be measured. Participants will then be randomized to either the exercise group or the usual care group. Those randomized to the usual care group will go home for 3-weeks and continue with their typical daily routine. Those randomized to the exercise group will return to the Heart Institute three times per week for 3-weeks to participate in a high intensity interval training program prior to their electro-cardioversion. All participants will be asked to measure daily heart rate and rhythm using the AliveCor system which is compatible with their Smartphones, for up to 12-months following their electro-cardioversion. All participants will be asked to return at 3-weeks (and prior to their electro-cardioversion) to measure fitness (cycle ergometer), body composition (weight, height, waist circumference and percentage body fat), and habitual exercise levels. The entire study should last approximately 24-months. Participants will be involved for 52-weeks. The investigators are looking to recruit 20 participants total for the feasibility trial. The investigators hypothesize that recruitment rates, drop-out rates, and adherence to the intervention will support a larger definitive trial.
This is a study looking at the feasibility of conducting a larger definitive research trial looking at the effectiveness of high intensity interval training on lengthening time to recurrence of persistent atrial fibrillation in individuals who are scheduled for electro-cardioversion. Usual care for these participants is to go home and continue with their typical daily routine until their scheduled cardioversion. The investigators will test whether participating in 3-weeks of thrice-weekly high intensity interval training before electro-cardioversion can lengthen the time to recurrence of atrial fibrillation after electro-cardioversion in these individuals. Participants will be asked to come to the University of Ottawa Heart Institute for a baseline visit at which fitness (cycle ergometer), body composition (weight, height, waist circumference and percentage body fat), and habitual exercise levels will be measured. Participants will then be randomized to either the exercise group or the usual care group. Those randomized to the usual care group will go home for 3-weeks and continue with their typical daily routine. Those randomized to the exercise group will return to the Heart Institute three times per week for 3-weeks to participate in a high intensity interval training cycle ergometer program prior to their electro-cardioversion. All participants will be asked to return at 3-weeks (and prior to their electro-cardioversion) to measure fitness (cycle ergometer), body composition (weight, height, waist circumference and percentage body fat), and habitual exercise levels. Following the electro-cardioversion, all participants will be asked to measure daily heart rate and rhythm using the AliveCor system which is compatible with their Smartphones/tablets/iPads, for up to 12-months or until they return to persistent atrial fibrillation. The entire study should last approximately 24-months. Participants will be involved for a maximum of 52-weeks. The investigators are looking to recruit a total of 20 participants for the feasibility trial. The investigators hypothesize that recruitment rates, drop-out rates, and adherence to the intervention will support a larger definitive trial.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| High-intensity interval training (HIIT) | Experimental | Participants in the HIIT group will receive 3-weeks of tri-weekly supervised exercise sessions at the University of Ottawa Heart Institute prior to their scheduled electro-cardioversion. The session will last 23 minutes in duration and consist of a 2-minute warm-up at 50% of peak power output (PPO), 2 x 8-minute interval training blocks of 30 seconds at 80-100% of PPO interspersed with 30-seconds of active recovery and a 1-minute cool down at 25 % of PPO. The sessions will be lead by a Registered Kinesiologist. |
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| Usual Care Control | No Intervention | Participants assigned to the control group will have usual care, which involves no behavioural interventions leading up to their electro-cardioversion. |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| High-intensity interval training | Behavioral | Participants in the HIIT group will receive 3-weeks of tri-weekly supervised exercise sessions at the UOHI prior to their scheduled electro-cardioversion. The session will last 23 minutes in duration and consist of a 2-minute warm-up at 50% of peak power output (PPO), 2 x 8-minute interval training blocks of 30 seconds at 80-100% of PPO interspersed with 30-seconds of active recovery and a 1-minute cool down at 25 % of PPO. The sessions will be lead by a Registered Kinesiologist. |
| Measure | Description | Time Frame |
|---|---|---|
| Feasibility - recruitment rates | recruitment rates | 52-weeks |
| Feasibility - loss to follow-up and drop-out rates | loss to follow-up and drop-out rates | 52-weeks |
| Feasibility - reasons for drop-out | reasons for drop-out | 52-weeks |
| Feasibility - adherence to study procedures | adherence to study procedures including daily AliveCor measures | 52-weeks |
| Feasibility - attendance at thrice-weekly HIIT sessions | attendance at thrice-weekly HIIT sessions | 3-weeks |
| Measure | Description | Time Frame |
|---|---|---|
| Time to recurrence of atrial fibrillation | Time to recurrence will be measured with a daily ECG recording up to 52-weeks from randomization, using the AliveCor system and Smartphone. | Up to 52 weeks after electro-cardioversion. |
| Physical Activity levels |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Jennifer L Reed, PhD | Ottawa Heart Institute Research Corporation | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Ottawa Heart Institute | Ottawa | Ontario | K1Z5P7 | Canada |
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| ID | Term |
|---|---|
| D001281 | Atrial Fibrillation |
| ID | Term |
|---|---|
| D001145 | Arrhythmias, Cardiac |
| D006331 | Heart Diseases |
| D002318 | Cardiovascular Diseases |
| D010335 | Pathologic Processes |
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| ID | Term |
|---|---|
| D000072696 | High-Intensity Interval Training |
| ID | Term |
|---|---|
| D064797 | Physical Conditioning, Human |
| D015444 | Exercise |
| D009043 | Motor Activity |
| D009068 | Movement |
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Participants will also be asked to complete a questionnaire related to habitual physical activity (modified Godin) at baseline and follow-up. The modified Godin asks participants to recall the last 7 days and report the number of days and the number of minutes per day they participated in mild, moderate and vigorous bouts of physical activity. These values are then multiplied together to calculate minutes/week of mild physical activity and minutes/ week of moderate-to-vigorous intensity physical activity. |
| 3-weeks |
| Fitness | Participants will complete a CPET at baseline and 3-weeks to assess fitness level using a pre-determined protocol on a cycle ergometer (Oxycon mobile, CareFusion, USA). | 3-weeks |
| Clinical outcomes | Body composition will be assessed: height | 3-weeks |
| Weight | Body composition will be assessed: weight | 3-weeks |
| Waist Circumference | Body composition will be assessed: waist circumference | 3-weeks |
| Body Mass Index | Body composition will be assessed: body mass index | 3-weeks |
| Body Fat | Body composition will be assessed:body fat percentage | 3-weeks |
| D013568 |
| Pathological Conditions, Signs and Symptoms |
| D009142 |
| Musculoskeletal Physiological Phenomena |
| D055687 | Musculoskeletal and Neural Physiological Phenomena |