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3.0T cardiac MR flow analysis of aortic regurgitation

Case Study
Yun, Chun-Ho, M.D. Mackay Memorial Hospital • Taiwan
Tsai, Cheng-Ting, M.D. Mackay Memorial Hospital • Taiwan
Yang, Fei-Shih, M.D. Mackay Memorial Hospital • Taiwan

Patient history

46-year-old male with dyspnea in exertion. No CAD risk factor. Moderate aortic regurgiation was diagnosed by cardioechography. Referred to Cardiac MRI for pre-operative evaluation.

MR examination

Achieva 3.0T with 32-channel SENSE Cardiac coil is used. Qflow done with Venc 250.

Images

 
Hearth Rate [bpm]                             54

RR Interval [ms]                          1120.7

                                                Vessel 1

Stroke Volume [ml]                         91.5

Forward Flow Volume [ml]              239.9

Backward Flow Volume [ml]            148.4

Regurgitant Fraction [%]                  61.9

Absolute Stroke Volume [ml]          388.3

Mean Flux [ml/s]                             81.6

Stroke Distance [cm]                       5.74

Mean Velocity [cm/s]                       5.12



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Diagnosis

In CINE imaging, the regurgitant from aortic root to LVOT is easily seen, consistent with the echo finding of aortic regurgitation.
On the Q-flow exam, severe regurgitant volume was present. the postprocessing result shows a forward flow volume of 239.9 ml, a backward flow volume of 148.4ml, a regurgitant fraction of 61.9%.

Clinical impact

Before surgery for cardiac valvular replacement, CMR could aid in most accurate evaluation of flow measurement in aortic regurgitation and aortic stenosis. CMR is much less affected by patient body size and operator dependent than cardiac echography.

Related reading



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Jun 5, 2012

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Case Study
Achieva 3.0T
Aorta, Cardiac, cine, CMR, Function Cine, LVOT, Q-Flow, regurgitation, SENSE Cardiac coil
 

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