A 66-year-old man with anterior wall myocardial infarction presents with acute dizziness. Vital signs show BP 88/56, HR 42, RR 18, SpO2 98% on room air. ECG demonstrates wide QRS complexes with a constant PR interval on conducted beats and intermittent nonconducted P waves. Troponin elevation confirms acute MI. He denies chest pain currently. Which of the following is the most likely diagnosis?
- A)Second-degree AV block, Mobitz I
- B)Atrial flutter
- C)Third-degree AV block
- D)Second-degree AV block, Mobitz IIGABARITO
- E)First-degree AV block
Explicação
This patient has Mobitz II block, characterized by dropped QRS complexes without progressive PR prolongation. It usually reflects disease below the AV node in the His-Purkinje system, often after anterior MI, and carries a high risk of progression to complete ... Ver explicação completa e trilha adaptativa →