A 19-year-old man presents with recurrent episodes of flaccid proximal weakness beginning after strenuous exercise or large carbohydrate meals. Between episodes he is neurologically normal. Current vital signs show BP 138/82, HR 88, RR 16, temperature 37°C, SpO2 98% on room air. Serum potassium is 2.8 mEq/L during the current attack. Creatine kinase is normal. Electromyography shows no denervation. Which of the following is the most likely diagnosis?
- A)Tetanus
- B)Guillain-Barré syndrome
- C)Hypokalemic periodic paralysisGABARITO
- D)Spinal muscular atrophy
- E)Myasthenia gravis
Explicação
Hypokalemic periodic paralysis is a channelopathy characterized by episodic weakness triggered by carbohydrate load or rest after exercise, with low serum potassium during attacks. Patients are usually normal between episodes. Ver explicação completa e trilha adaptativa →