Arrhythmias during dipyridamole test. Report of 3 cases

The authors report three cases in which the dipyridamole test provoked: (1) junctional rhythm with AV dissociation; (2) sinus arrest; (3) 2:1 AV block. The three cases described above draw attention to the possible effect of dipyridamole on the AV conduction, which is not yet completely known. This unwanted effect suggests that careful ECG monitoring should be performed during the dipyridamole test.