This ECG is from a man in his 50s who presented with syncope on a background of diabetes, opiate abuse and possible prior cardiac disease.
This ECG shows a supraventricular tachycardia with evidence of P waves, left axis deviation and slightly wider QRS (106 msec) likely due to LAFB, tall QRS concerning for LVH and fragmentation in V2-4 suggesting prior MI.
This ECG is from a man in his 30s who presented with non-radiating substernal chest pain. He did not have any known medical comorbidities and did not take any medications. On arrival to the Emergency Department he was hypertensive and bradycardic, but alert and ambulatory. Whilst in the ED he had an episode of ventricular fibrillation, was resuscitated and was sent to the cath lab - but his coronary arteries were clear.