A 24-year-old woman presents with sudden-onset palpitations and lightheadedness. Vital signs show BP 102/68 mmHg, HR 180 bpm, RR 18, temperature 37.2°C, and SpO2 98% on room air. ECG reveals a regular narrow-complex tachycardia at 180 bpm with no clearly visible P waves. Troponin is normal. She denies chest pain or dyspnea. Carotid sinus massage terminates the rhythm. Which diagnosis best explains these findings?
- A)Cardiogenic shock
- B)AV nodal reentrant tachycardiaGABARITO
- C)Wolff Parkinson White syndrome
- D)Torsades de pointes
- E)Atrial flutter
Explicação
AV nodal reentrant tachycardia is correct. A regular narrow complex tachycardia that terminates with carotid sinus massage indicates an arrhythmia dependent on AV nodal conduction. Increased vagal tone transiently slows conduction through the AV node and inter... Ver explicação completa e trilha adaptativa →