Cardiac magnetic resonance imaging (CMRI)
MAD diagnosis was confirmed with CMR analysis. Systolic displacement of
mitral leaflet(s) at least 2 mm away from the annulus was determined as
the lowest limit for diagnosis, as defined earlier (1). MAD length is
measured in the sagittal views as the distance between the leaflet
insertion on the detached annulus and the left ventricle border. All CMR
examinations were performed on a 1.5T scanner (Aera Siemens Medical
system, Erlangen,Germany) using a phased-array body coil. All patients
were monitored during the procedure. The sequences were acquired using
prospective cardiac gating. All acquisitions used balanced steady-state
free precession cine sequence with the following typical parameters:
TR/TE 3.8/1-3ms, slice thicknes 8mm with 2mm interclice gap, voxel size
1.8mmx1.8mmx6mm and acquired temporal resolution 40ms.