CLASSIFICATION OF COARCTATION OF THE AORTA

Type I    IA IB	Coarctation with / without a patent ductus arteriosus With a ventricular septal defect With other major cardiac defects
Type II   IIA IIB	Coarctation with isthmus hypoplasia with / without a patent ductus arteriosus With a ventricular septal defect With other major cardiac defects
Type III  IIIA IIIB	Coarctation with hypoplasia of the isthmus and a segment between the left carotid and subclavian arteries, with / without a patent ductus arteriosus With a ventricular septal defect With other major cardiac defects

REFERENCES

1. Amato JJ, Galdieri RJ, Cotroneo JV. Role of extended arthroplasty related to the definition of coarctation of the aorta. Ann Thorac Surg 1991;52:615-620.