Predictors of poor outcome across several studies in Kawasaki disease (KD) include all the following EXCEPT

Correct Answer: A

Rationale: Old age is not a recognized predictor of poor outcome in KD.

Correct Answer: D

Rationale: Esophageal atresia with or without tracheoesophageal fistula presents with excessive oral secretions, choking, and difficulty feeding due to a disconnected or abnormal esophagus. Diagnosis is confirmed with a nasogastric tube X-ray.

Correct Answer: B

Rationale: A prolonged prothrombin time unresponsive to vitamin K suggests severe hepatic synthetic dysfunction and is a poor prognostic indicator in fulminant hepatitis.

Correct Answer: D

Rationale: Sodium is primarily distributed in extracellular fluid, with a volume of distribution of about 0.6 times total body weight, including interstitial and intravascular compartments.

Correct Answer: D

Rationale: Innocent murmurs are benign and require no restriction of activity, antibiotic prophylaxis, or serial echocardiography unless symptoms suggest structural heart disease.