Physical findings Diagnoses to consider Specific tests Cardiovascular abnormalities Congenital heart disease Echocardiogram, ECG Kawasaki disease ECG, erythrocyte sedimentation rate Supraventricular tachycardia ECG Myocarditis Echocardiogram, ECG, troponin, cardiac MRI Myocardial infarction ECG, cardiac MRI, troponin Methemoglobinemia Pao2 methemoglobin level Neurologic abnormalities Meningitis Lumbar puncture Infant botulism Child abuse Stool for toxin identification Long bone films, CT scan, or MRI CT scan, or MRI Long bone films, CT scan, or MRI Coagulation profile PCR, electroencephalogram, CT scan, or MRI Blood for 17hydroxyprogesterone, renin, aldosterone, cortisol PCR Shunt malfunction Skin abnormalities Child abuse Coagulopathy Herpes simplex Genitalia abnormalities Congenital adrenal hyperplasia Pulmonary abnormalities Pertussis Pneumonia Bronchiolitis Renal abnormalities Metabolic acidosis Posterior urethral valves Chest radiograph Respiratory syncytial virus tests Arterial blood gas Abdominal, renal ultrasound, voiding