Table 5. Characteristics of failed procedures.

	Age (yrs)	Weight (kg)	TTE diam (mm/m2)	Balloon-stretched diam (mm/m2)	Aneury smal septum	PAH	Deficient rims						Echo guidance	ASO (mm)	ASO/LA length (%)	Reason for failure
							Aortic	Post	Ant-inf	Post-sup	Inf	Sup
Pt 1	9	36	18.5	21.9	No	No	No	No	No	No	No	No	TEE	24	80–90	Unstable ASO
Pt 2	6	16	16.7	22.7	No	No	Yes	Yes	No	Yes	Yes	Yes	TEE	24	>100	ASD too large
Pt 3	6	18	26.4	34.3	No	No	Yes	Yes	No	Yes	Yes	Yes	TEE	22	>100	ASD too large
Pt 4	4	16	21.7	28.9	No	No	Yes	No	No	No	No	No	TEE	22	>100	ASD too large
Pt 5	11	44	28.2	16.9	No	No	Yes	No	No	No	No	No	TTE	18	<80	Unstable ASO
Pt 6	6	11	26.6	37.6	No	No	No	Yes	No	Yes	Yes	Yes	TTE	34	>100	ASD too large
Pt 7	7	16	15.5	26.8	No	No	Yes	No	No	No	No	No	TTE	34	>100	ASD too large
Pt 8	12	20	11.3	20.0	No	No	No	No	Yes	No	No	No	TTE	22	80–90	Unstable ASO
Pt 9	13	56	13.1	16.2	No	No	Yes	No	Yes	No	No	No	TTE	20	<80	Unstable ASO
Pt 10	5	21	14.6	21.9	No	No	No	Yes	No	Yes	Yes	Yes	TEE	14	<80	LV embolization
Pt 11	8	30	14.3	25.7	No	No	Yes	No	No	No	No	No	TEE	28	>100	RA embolization
Pt 12	15	51	10.6	19.9	No	No	No	No	No	No	No	No	TEE	24	80–100	LA embolization
Pt 13	11	30	11.7	15.4	No	No	Yes	Yes	Yes	No	Yes	Yes	TEE	36	>100	RV embolization

PAH, pulmonary arterial hypertension; LA, left atrium; RA, right atrium; RV, right ventricle; post, posterior; antinf, anteroinferior; postsup, posterosuperior; inf, inferior; sup, superior; TEE, transesophageal echocardiography; TTE, transthoracic echocardiography.