Transthoracic Assessment of Coronary Flow Velocity Reserve: A Practical Approach to Diagnostic Testing in Patients with Angina and No Obstructive Coronary Artery Disease

Figure 2

2D color Doppler view of the left anterior descending artery (LAD) demonstrating the importance of artery identification and alignment for accurate CFVR estimation. (a) Optimal visualization of the LAD segment in a foreshortened two-chamber view. Suboptimal artery identification compromising quality of CFVR evaluation: (b) only a short segment of the artery visible; (c) tortuous artery; and (d) multiple vessels in the same frame.

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