Ask Dr. Z

7-year-old female status post cardiac arrest thought to be secondary to dilated cardiomyopathy. Patient presents to cath lab for "septostomy to decompress the LA".  Procedures performed: RHC, ASD creation, and stenting under TEE guidance. Septostomy was performed. She had a "thinned out appearance of her ventricle", so the cardiologist felt a more stable decompression by placing a stent was in order. I don't see that this patient had a previous history of congenital heart disease, but would the "dilated cardiomyopathy" in such a young patient be considered something she might have been born with, or is that something that happens from an injury to the heart? What would my CPT codes be? 33999?