Ivabradine for inappropriate sinus tachycardia-induced symptomatic Mobitz type I atrio-ventricular block: a case summary.

ABSTRACT:

Background

Inappropriate sinus tachycardia (IST) is characterized by a continuum of symptoms, and the aetiology of IST is imprecise. IST-induced autonomic dysfunction is well known, but IST-induced atrio-ventricular block is not reported to our knowledge.

Case summary

A 67-year-old female presented with a 4-day history of random intermittent difficulty in breathing, chest tightness, palpitations, and dizziness, with a recorded heart rate of 30 beats per minute (BPM) on home monitoring equipment. The initial electrocardiogram (ECG) demonstrated sinus rhythm with intermittent Mobitz type I second degree atrio-ventricular (AV) block, with continuous cardiac monitoring demonstrating frequent episodes of Wenckebach phenomenon throughout the day, with a sinus rate of 100-120 BPM.

SUBMITTER: Korolewicz J 

PROVIDER: S-EPMC10289141 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature