and hole in the heart as per history - looks like she is suffering from Atrial septal defect
ASD . To confirm this TEE trans oesophageal echo test will help . about blockages - angiography
is the preferred test , here she can also undergo cardiac catheterisation so that we can come to know severity of pulmonary hypertension also . This will be good alternative to CT scan
study as in tht case also later she may require coronary angiography .
lets not think about complications before complete diagnosis .