A 29-year-old man from Connecticut presents with lightheadedness and palpitations. Two weeks ago, he had fever (38.9°C), a circular expanding erythema migrans rash on his thigh after camping. Vital signs: BP 98/62, HR 42, RR 16, SpO2 98%. ECG demonstrates complete heart block with normal QRS duration. Serum Lyme serology is positive. He denies recent antibiotic use. Which of the following is the most likely underlying diagnosis?
- A)Sarcoidosis
- B)Lyme carditisGABARITO
- C)Hyperkalemia
- D)Rheumatic fever
- E)Brugada syndrome
Explicação
Borrelia burgdorferi infection can involve the conduction system and cause fluctuating degrees of AV block, including complete heart block. The erythema migrans-like rash and tick exposure strongly support Lyme carditis. Ver explicação completa e trilha adaptativa →