Please click here to obtain permission to reproduce this image.
Click on image to view larger version.
Figure 3 Patient 24. Initiation of AV reentrant echo beats following the administration of 30 mg ATP in a patient with a concealed posteroseptal AP and no electrophysiologic evidence of dual AV node physiology. One echo beat occurs after each of four consecutive sinus beats (QRS complexes No. 2 through No. 5) with the first echo following a slight prolongation (20 ms) in PR interval. A sinus beat associated with a shorter PR interval subsequently occurs, followed by an atrial premature beat and another AV reentrant echo beat.
|
