Fig. 7
From: Cardiovascular magnetic resonance in the evaluation of heart valve disease
CMR-derived AV area by 2D planimetry. SSFP cine sequences of (a) the LV outflow tract and (b) three-chamber with LV outflow tract showing restricted AV leaflets and a stenotic jet. The perpendicular white lines indicate the slice position used for planimetry. (c) Direct planimetry of the AV orifice during systole. The calculated aortic valve area (0.95cm2 indicates severe AS). Source: University Hospitals of Leicester NHS Trust