system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
An 11-year-old boy presents to his pediatrician for a wellness checkup. The child is an immigrant, and this is his first visit. The patient is in the 99th percentile for height and 50th percentile for weight. The child is struggling in school, and basic cognitive testing suggests he is moderately mentally disabled. His temperature is 99.5°F (37.5°C), blood pressure is 107/68 mmHg, pulse is 90/min, respirations are 17/min, and oxygen saturation is 98% on room air. Laboratory values are obtained and shown below.

Hemoglobin: 9 g/dL
Hematocrit: 30%
MCV: 110 fL
Leukocyte count: 5,500/mm^3 with normal differential
Platelet count: 192,000/mm^3

Serum:
Na+: 140 mEq/L
Cl-: 101 mEq/L
K+: 4.4 mEq/L
HCO3-: 24 mEq/L
BUN: 20 mg/dL
Glucose: 90 mg/dL
Creatinine: 1.0 mg/dL
Ca2+: 10.0 mg/dL
AST: 12 U/L
ALT: 10 U/L

The patient is started on vitamin B9 and B12. Which of the following interventions could decrease the risk for cardiac complications the most in this patient?
assistant
Pyridoxine