A 49-year-old man presents to the emergency department after an episode of syncope. The following ECG is obtained:
A 92-year-old man is brought to the emergency department by EMS with palpitations. The following ECG is obtained on arrival:
A 72-year-old man with PMHx of HTN presents to the emergency department with vomiting and lightheadedness. He is noted to be slightly bradycardic with an irregular rhythm on arrival. The…