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  • Title: [Exercise-induced atrioventricular block].
    Author: Barbero JM, Goicolea A, López Gil M, Grande JM, García-Cosío F.
    Journal: Rev Esp Cardiol; 1993 Mar; 46(3):201-4. PubMed ID: 8488325.
    Abstract:
    Exercise-induced atrioventricular block in patients with normal atrioventricular conduction at rest is uncommon. Electrophysiologic studies have documented block distal to the atrioventricular node in these patients. Implantation of a permanent pacemaker is recommended because of a high incidence of subsequent symptomatic block. We report three symptomatic patients with exercise-induced atrioventricular block. Two patients showed a bundle branch block in the baseline electrocardiogram, suggesting a distal location of the block. In the remainder, with a normal QRS, the electrophysiologic study revealed AV block within the His bundle in response to atrial pacing.
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