Table 3.

Key MR sequence and their utility in pre-operative evaluation for TAVI

Sequence	Purpose
Three-plane localizer	Localize aortic valve plane
Axial SSFP non-ECG gated without contrast	Identify potential ascending aorta and subclavian access sites, determine size, calcification, and presence of aneurysmal dilatation of aorta
Breath held/free breathing 2D ECG-gated SSFP: Coronal Aorta, LVOT and Aortic Root	Evaluate aortic annulus, aortic valve structure, and sinus height Planimetry valve orifice area
SSFP ECG gated images: short axis stack	Calculate ejection fraction, ventricular volumes and mass
Breath held/free breathing phase contrast at aortic orifice	Calculate blood flow velocity, pressure gradient and flow volume across the aortic valve Calculate aortic regurgitant volume
3-D Navigator assisted SSFP	Coronary ostia height Aortic diameter
T2 Black Blood	Useful in presence of susceptibility artifacts from sternal wires or prosthetic valves