A 67-year-old man comes to the emergency department because of palpitations and mild shortness of breath that began this morning. He has hypertension and coronary artery disease. Pulse is 150 per minute and regular. ECG shows narrow QRS complexes with an atrial rate of about 300 per minute and sawtooth flutter waves in the inferior leads. Which of the following is the most likely diagnosis?
- A)Atrial flutterGABARITO
- B)Multifocal atrial tachycardia
- C)Atrial fibrillation
- D)Sinus tachycardia
- E)AV nodal reentrant tachycardia
Explicação
This patient has typical atrial flutter. The regular ventricular rate of about 150 per minute with an atrial rate near 300 per minute and sawtooth flutter waves reflects a macroreentrant circuit, usually in the right atrium with 2:1 AV conduction. Ver explicação completa e trilha adaptativa →