A 23-year-old female presents with sudden onset of palpitations. Her heart rate is recorded at 220 beats/min with a regular rhythm, and her blood pressure is 110/70 mmHg. She denies chest pain, shortness of breath, or dizziness. What could be the potential diagnosis, and how would you manage this?
This patient's presentation of sudden onset palpitations with a regular rapid heart rate is suggestive of supraventricular tachycardia (SVT). In a hemodynamically stable patient without severe symptoms, vagal maneuvers like the Valsalva maneuver or carotid sinus massage can be attempted. If unsuccessful, intravenous adenosine can be administered under cardiac monitoring.