Why the study?
What are the effects of physical exercise, isoproterenol, and atropine on ventricular rate and regularity in patients with AF during verapamil-induced regular ventricular rhythm?
What are the effects of physical exercise, isoproterenol, and atropine on ventricular rate and regularity in patients with AF during verapamil-induced regular ventricular rhythm?
Verapamil induces a regular ventricular rhythm in AF, likely due to total AV-nodal block with nodal escape, which is disrupted by exercise, isoproterenol, or atropine.
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Verapamil may induce regular ventricular response in AF via nodal escape; single case leaves open clinical utility and need for validation.
Khalsa et al. (1979) studied this question.
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