In this study a new technique for ablation in atrioventricular nodal reentrant tachycardia using cryo-energy will be studied in cases where the standard approach has higher risk.
Atrioventricular nodal reentrant tachycardia (AVNRT) is the most common cause of fast heartbeats in young people. People with AVNRT have two pathways within the heart, the fast pathway (FP) and slow pathway (SP). A treatment for AVNRT is ablation (burning or freezing) of the SP. This can be done with either radiofrequency or cryo-energy. A complication which occurs in 1% of cases is AV block (AVB), meaning the person needs a pacemaker. Slow pathway ablation is a problem in people when the electrocardiogram (ECG) shows a long PR interval, with greater rates of AVB. This accounts for 5% of AVNRT cases. A possible solution is to treat the FP with cryo-energy and leave the SP intact. This pilot study aims to show this is safe and effective.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
20
Cryoablation
Lawson Health Research Institute
London, Ontario, Canada
RECRUITINGTermination of AVNRT
Number of participants where cryotherapy terminates AVNRT
Time frame: One day
Freedom from recurrence
Number of participants with no recurrence of AVNRT during follow-up
Time frame: 1 year
Incidence of AV block
Number of participants where AV block is observed
Time frame: 1 year
Cardiac tamponade
Number of participants with pericardial effusion and/or tamponade following procedure
Time frame: 1 year
Vascular complications
Number of participants with groin hematoma or fistula requiring intervention following procedure
Time frame: 1 year
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