10 November 2025
: Case report 
Atrio-Ventricular Nodal Block Associated with Methamphetamine Use
Unusual clinical course, Challenging differential diagnosis, Clinical situation which can not be reproduced for ethical reasons
Nicholas L. Vitagliano ABCDEFG 1*, Tyler Ky ABE 1, John M. Kennedy ABDEFG 2DOI: 10.12659/AJCR.950013
Am J Case Rep 2025; 26:e950013
Figure 2 Telemetry rhythm strip recorded from lead II at a paper speed of 25 mm/second and a voltage calibration of 10 mm/mV. The strip demonstrates a 2: 1 atrio-ventricular block, with P waves (blue arrows) occurring at regular intervals and QRS complexes (red arrows) also occurring at regular intervals, such that every other P wave is not followed by a QRS complex.