Why the study?
Does ivabradine improve inappropriate sinus tachycardia in a patient post-AVNRT cryoablation with residual first-degree AV block?
Does ivabradine improve inappropriate sinus tachycardia in a patient post-AVNRT cryoablation with residual first-degree AV block?
Ivabradine successfully treated inappropriate sinus tachycardia following AVNRT cryoablation without worsening pre-existing first-degree AV block.
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Ivabradine may control post-AVNRT inappropriate sinus tachycardia without worsening first-degree AV block; single case leaves open need for controlled trials.
We illustrate a case of persistent inappropriate sinus tachycardia after slow pathway atrio-ventricular (AV) nodal reentrant tachycardia cryoablation, and inadvertent fast pathway lesion with residual first-degree AV block in a 72-year-old man with a small Koch's triangle. At the end of the cryoprocedure, the patient presented with sinus tachycardia 100 b.p.m., while PR was 300 ms. An accelerated sinus rhythm and a PR prolongation persisted over time. The patient was successfully treated with ivabradine with no effect on atrioventricular node conduction.
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Sisti et al. (2010) studied this question.
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