Key Points Definition: Sinus tachycardia is a regular cardiac rhythm originating from the sinoatrial (SA) node, characterized by a resting heart rate exceeding 100 bpm in adults or above the…
A 36-year-old woman is brought into the emergency department after an episode of syncope. She reports palpitations prior to the episode but is otherwise asymptomatic on arrival. Vital signs are…
HPI: A 69-year-old woman presents to the ED with palpitations and lightheadedness. She is noted to be tachycardic. The following ECG is obtained: Case ECG