Table 3.

Procedures performed

Procedure Performed	Weighted frequency Group with ASp
Open and other replacement of aortic valve with tissue graft ICD9-35.21	<10 weighted discharges
Open and other replacement of aortic valve ICD9-35.22	<10 weighted discharges
Closed heart valvotomy, aortic valve ICD9-35.01	0 weighted discharges
Endovascular replacement of aortic valve ICD9-35.05	0 weighted discharges
Transapical replacement of aortic valve ICD9-35.06	0 weighted discharges
Percutaneous balloon valvuloplasty ICD9-35.96	<10 weighted discharges