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| ID | Type | Description | Link |
|---|---|---|---|
| U1111-1250-5793 | Other Identifier | WHO Universal Trial Number |
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| Name | Class |
|---|---|
| InCor Heart Institute | OTHER |
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A randomized pilot study to evaluate safety and efficacy endpoints for treatment of para-hisian accessory pathways according to two different strategies of lesion formation.
These patients will be divided into 2 groups with different strategies of treatment: group 1 treated with radiofrequency (RF) ablation, group 2 with cryotherapy (CRYO).
The primary outcome will be the recurrence rate of accessory pathway conduction after one year of follow-up. Secondary endpoints will be immediate success and rate of permanent atrioventricular (AV) block.
This is a randomized study on the safety and efficacy for percutaneous ablation of para-hisian accessory pathways according to two different modalities: radiofrequency (RF) or cryotherapy.
Thirty patients with symptomatic or high-risk para-hisian accessory pathways, documented by previous electrophysiological study (EPS), referred to percutaneous catheter ablation, will be enrolled in this trial.
After informed consent, these patients will be randomized in 2 groups with different current established strategies of invasive treatment. Group I: electrophysiological mapping and ablation with radiofrequency (RF) focal lesion formation.
Group II: electrophysiological mapping and ablation with cryotherapy (CRYO) focal lesion formation.
The primary outcome will be the recurrence rate of accessory pathway conduction after one year of follow-up. Secondary endpoints will be immediate success and rate of permanent atrioventricular (AV) block.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Radiofrequency (RF) | Active Comparator | Twenty patients will be allocated to this group, which will be treated using radiofrequency (RF) ablation technique. |
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| Cryotherapy (CRYO) | Active Comparator | Twenty patients will be allocated to this group, which will be treated using Cryotherapy (CRYO) ablation technique. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Radiofrequency (RF) | Device | Will be evaluated if percutaneous radiofrequency catheter ablation is superior to cryotherapy as treatment modality of para-hisian accessory pathways. |
| Measure | Description | Time Frame |
|---|---|---|
| One-year recurrence rate | Recurrence rate of accessory pathway conduction, as assessed by follow-up Clinical recording and event monitoring external device (Holter/Looper). | One year |
| Measure | Description | Time Frame |
|---|---|---|
| Immediate success rate | Mensuration of immediate success at the EP lab after ablation therapy is finished, defined by elimination of accessory pathway and/or noninducibility of arrhythmias at the end of procedure, as assessed by standard electrophysiological maneuvers. If an evidence of accessory pathway conduction still remains at the end of procedure it will count as an unsuccessful case. Does not take into account recurrences after the end of procedure, e.g. in the hospital ward before discharge. |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Mauricio I Scanavacca, MD, PhD | Instituto do coração - HC/FMUSP | Study Chair |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Arrhythmia Clinical Unit - Instituto do Coração - HCFMUSP | São Paulo | São Paulo | 05403010 | Brazil |
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| ID | Term |
|---|---|
| D001145 | Arrhythmias, Cardiac |
| D011226 | Pre-Excitation Syndromes |
| D014927 | Wolff-Parkinson-White Syndrome |
| ID | Term |
|---|---|
| D006331 | Heart Diseases |
| D002318 | Cardiovascular Diseases |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |
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| ID | Term |
|---|---|
| D017679 | Cryotherapy |
| ID | Term |
|---|---|
| D013812 | Therapeutics |
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| Cryotherapy (CRYO) | Device | Will be evaluated if percutaneous cryotherapy catheter ablation is superior to radiofrequency as treatment modality of para-hisian accessory pathways. |
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| Time span between vein puncture (start of procedure) and sheath removal (end of procedure), comparing with baseline rhythm |
| Rate of atrioventricular block | Safety outcome of any permanent atrioventricular (AV) block that occurred immediately after ablation start or during hospital admission. | up to 24 hours |
| D000075224 | Cardiac Conduction System Disease |
| D006330 | Heart Defects, Congenital |
| D018376 | Cardiovascular Abnormalities |
| D000013 | Congenital Abnormalities |
| D009358 | Congenital, Hereditary, and Neonatal Diseases and Abnormalities |