MRI Short Axis

NORMAL MRI SHORT AXIS VIEW
This is the MRI of a 19-year-old male who presented with syncope and the study was performed to identify a possible arrhythmogenic focus
White blood imaging using short axis view shows a normal sized heart in systole (above) and diastole (below). The left and right ventricles show normal wall thicknesses and the volume of the chambers in systole are about 2/3 the volume in diastole (normal). There is no obvious dyskinetic segment of the RVOT.
Ashley Davidoff MD
NORMAL MRI SHORT AXIS VIEW WITH MEASUREMENTS
This is the MRI of a 19-year-old male who presented with syncope and the study was performed to identify a possible arrhythmogenic focus.
White blood imaging using short axis view shows a normal sized heart in systole (above) and diastole (below). The transverse dimension of the LV is 4cms in diastole which is normal. The septum of the LV in diastole (lower image) is less than 9.2mms, and the free wall is 8.7 mms (upper limits normal is 1.2cms. The wall of the RV is barely seen in diastole and measures about. In systole the residual volume of the RV is about 1/3 the diastolic volume indicating an approximate ejection of 2/3 = 66% ejection fraction (EF). Similarly, at peak LV systole the residual volume of the LV is about 1/3 the diastolic volume indicating an approximate ejection of 2/3 = 66% ejection fraction (EF).
Ashley Davidoff MD

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