Anatomy and Slice Positioning (Tech)-2d Flow/Velocity Measurements and Valve

Video Transcription

Video Summary

The speaker explains how cardiac MRI (CMR) helps assess valvular heart disease when echocardiography is unclear or when imaging will change management. CMR is especially useful for measuring valve anatomy, valve area, regurgitant flow, and the impact on ventricular size and function. For aortic stenosis and regurgitation, CMR can directly planimeter the valve orifice and quantify flow, though very high velocities may be underestimated. Mitral regurgitation is usually calculated indirectly from stroke volume comparisons, while mitral stenosis can be directly planimetered. CMR is often first-line for pulmonary valve disease and helpful for tricuspid disease, particularly when RV volumes and regurgitation need assessment. The talk also covers special imaging planes for each valve, the importance of aligning slices with flow jets, and limitations caused by artifacts from prosthetic valves.

Keywords

cardiac MRI

valvular heart disease

aortic stenosis

mitral regurgitation

pulmonary valve disease

prosthetic valve artifacts