Table 2.

Echocardiographic and procedural characteristics, stratified according to whether patients had invasive angiogram before their transcatheter aortic valve implantation procedure

	Whole group (n = 348)	No coronary angiogram group (n = 194)	Coronary angiogram group (n = 154)	P value
Peak gradient (mean ± SD)	74 ± 23	73 ± 22	74 ± 24	NS
Mean gradient (mean ± SD)	43 ±15	44 ±15	43 ±15	NS
Valve area (mean ± SD)	0.70 ± 0.20	0.71 ± 0.18	0.69 ± 0.22	NS
Preserved LV function, n (%)	274 (79)	158 (81)	116 (75)	NS
Moderate MR, n (%)	35 (10)	20 (10)	15 (10)	NS
PA pressure (mean ± SD)	39 ± 20	40 ± 15	39 ± 25	NS
Indication for AR or mixed AoV disease, n (%)	19 (6)	9 (5)	10 (7)	NS
Bioprosthetic valve, n (%)	17 (5)	14 (7)	3 (2)	< 0.05
GA, n (%)	23 (7)	4 (2)	19 (12)	< 0.01
BAV, n (%)	34 (10)	15 (8)	19 (12)	NS
Transfemoral approach, n (%)	311 (89)	183 (94)	128 (83)	< 0.01
Balloon-expanding, n (%)	295 (85)	161 (83)	134 (87)	NS
Valve size (> 23 mm), n (%)	222 (64)	125 (64)	97 (63)	NS

LV: Left ventricle; MR: Mitral regurgitation; PA: Pulmonary pressure; AR: Aortic regurgitation, AoV: Aortic valve disease; GA: General anaesthesia; BAV: Balloon valvuloplasty performed for pre-dilatation; NS: No significant difference.