Key result
Radiofrequency catheter ablation successfully eliminated the reentrant circuit of sinus node reentrant tachycardia without causing sinus node dysfunction, with no clinical recurrence at 6 weeks.
Why the study?
Does radiofrequency catheter ablation eliminate sinus node reentrant tachycardia without causing sinus node dysfunction?
Case Report (n=1)
Does radiofrequency catheter ablation eliminate sinus node reentrant tachycardia without causing sinus node dysfunction?
Radiofrequency catheter ablation can successfully eliminate sinus node reentrant tachycardia without causing sinus node dysfunction.
Answers are grounded in this paper and cite their sources.
Supports ablation feasibility for sinus node reentrant tachycardia without dysfunction; leaves open need for prospective validation before wider use.
Sinus node reentrant tachycardia is a relatively uncommon (5%-15%) form of recurrent paroxysmal supraventricular tachycardia (SVT). We describe a case of symptomatic sinus node reentrant tachycardia in a 67-year-old male with ischemic heart disease, congestive heart failure, and depressed ventricular function. Adenosine administered during an electrophysiology study caused prolongation of the tachycardia cycle length due to atrial cycle length prolongation (without atrio-His prolongation) prior to tachycardia termination. Right atrial mapping revealed the earliest site of atrial activation in the high lateral right atrium just below the superior vena cava. Low energy (10 and 20 W) radiofrequency lesions were applied at this site with termination of the tachycardia within 3 seconds of radiofrequency energy delivery. Tachycardia could not be reinduced after delivery of the radiofrequency lesions. The sinus node function immediately and 6 weeks after radiofrequency catheter ablation remained normal and the patient was without clinical recurrence of SVT. Mapping of sinus node reentrant tachycardia and elimination of the reentrant circuit with radiofrequency catheter ablation is possible without causing sinus node dysfunction. Adenosine causes prolongation of the atrial cycle length followed by termination of sinus node reentrant tachycardia.
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Sperry et al. (1993) conducted a case report in Sinus node reentrant tachycardia (n=1). Radiofrequency catheter ablation was evaluated on Termination of tachycardia and sinus node function. Radiofrequency catheter ablation successfully eliminated the reentrant circuit of sinus node reentrant tachycardia without causing sinus node dysfunction, with no clinical recurrence at 6 weeks.
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