The EKG in the patient treated with adenosine

Electrocardiographic Findings:

 * 1) Decreases the automaticity of the sinus node and AV nodal conduction
 * 2) Caused by an increase in the AH interval and not by an increase in the HV interval
 * 3) Blocks occur within 20 seconds of i.v. administration
 * 4) The incidence of transient second degree AV block is high