ecg taken for screening in hypertensive patient. Appears nor | Figure 1

PAC? PVC?

Questionable rhythm: Pt in NSR. No changes in PR.

Help an oncologist out...what rhythm is this?

Update from prior case: The rhythm is sinus.

A 52-year-old man presented with a 20-minute history of chest pain.

A 28-year-old woman presented with a 3-day history of intense pruritus.

A 4-month-old male infant presented with skin lesions localized to the chin.

Patient in late teens presenting after a collapse.