17y old male pt presented to ED with an attack of retrosternal burning pain & 1 episode of vomiting.
Vitally stable unremarkable examination.
Ecg was obtained as following:
@mohammed_98j With fast and regular sinus it may be type 2nd degree AV block (PR intervals are hard to measure within T waves) but another consideration is 3:2 AV Wenckebach block with sinus something below 100 bpm.
Atropin and/or exercise will tell you.