The Bottom Line: Atropine applies a direct influence AV junctional tissue function and subjunctional components of the cardiac conduction system. Bradycardia patients are more likely to respond favorably than are those with atrioventricular block
Brady, William J. Jr Diagnosis and management of bradycardia and atrioventricular block coronary ischemia Emergency Medicine Clinics of North America – Volume 19, Issue 2 May 2001
Incidences of bradyarrhythmias in the setting of acute myocardial infarction, which include both bradycardia and conduction block, is approximately 25% to 30%. Of the rhythm disturbances, sinus bradycardia is found in around 40% of patients; this is most common bradyarrhythmia in patients with acute myocardial infarction.