A 68-year-old man is on postoperative day 3 after coronary artery bypass graft surgery. He develops an irregularly irregular tachycardia with heart rate of 118/min. Vital signs show blood pressure 132/78 mmHg, respiratory rate 20/min, temperature 37.2°C, and SpO2 98% on room air. P waves are not visible on electrocardiography. Troponin is mildly elevated at 0.08 ng/mL. He denies chest pain. He is not currently taking beta-blockers. Which diagnosis is most likely?
- A)Mobitz II block
- B)Junctional escape rhythm
- C)Ventricular tachycardia
- D)Atrial flutter
- E)Atrial fibrillationGABARITO
Explicação
Postoperative atrial fibrillation is common after cardiac surgery due to atrial irritation, inflammation, and autonomic changes. The irregularly irregular tachycardia without discrete P waves is classic for AF. Ver explicação completa e trilha adaptativa →