Table 1.

Preoperative CT scan methods of severe aortic valve stenosis acquisition data before TAVR.

Procedure	Acquisition		Stratification data
CT scan 250 Multislice	DPL		AORTIC VALVE ANALYSIS
Leaflet and aortic root features and behavior	459 mGy/cm	Functional aortic structure assessment	Morphological aortic valve study	Anatomical AVA determination
Aorta CTA and TAVI planning	(i) Fast acquisition (<7 sec) with uniform contrast. (ii) Ensure excellent IQ on coronaries, aortic valves & ascending aorta even without Betablocker	Mixed axial gated & helical ungated modes	Lower dose: up to 70% dose reduction	MMAR to reduce metal artifact when hip prosthesis
2D Echocardiography
Aortic valve leaflet	Parasternal short-axis	>20 mm	96%	97%
Aortic valve area	Parasternal long-axis	≥2.5 cm2	64%	95%
Aortic Gradient	Parasternal long-axis	≥39.5°	98%	97%
ITVI	Parasternal long-axis	≥45°	100%	95%
Left ventricular end-diastolic diameter	Parasternal long-axis	>65 mm	Not available	Not available
Left ventricular end-systolic volume	Apical 4-chamber	≥145 mL	90%	90%
FE Teichholz	Parasternal long-axis	≥2.5 cm2	64%	95%
Pisa radius	Apical 4-chamber	≥10 mm	64%	90%
Mitral Gradient	Parasternal long-axis	≥11 mm	81%	84%
Basal aneurysm/dyskinesis	Apical, parasternal, or short-axis	Present	Not available	Not available
3D Echocardiography
Aortic leaflet	Full volume modeling	≥29.9°	85%	89%
Aortic area	Full volume modeling	≥29.9° + yes	85%	92%