case_images: PMC10787362_01
case_images: Diagnostic coronary angiography showing marked systolic compression (delineated with arrows), indicative of myocardial bridging (A); apparent normal course of the LAD in diastole (B); FFRCT prior to surgical unroofing, with FFR values shown along the LAD (C); FFRCT after surgical unroofing with normalization of FFRCT values (D).
case_images: ytae005f1.jpg
case_images: PMC10787362_01_ytae005f1.jpg
case_images: ytae005-F1
case_images: However, a MB at the mid-portion of the left anterior descending coronary artery (LAD) was seen with visually important 'systolic milking' (>70% luminal reduction) and a clear step down-step up phenomenon due to systolic compression of the tunnelled segment (Figure 1A and B). Cardiac computed tomography angiography derived fractional flow reserve (FFRCT) was also measured (Heartflow Inc., CA, USA) and repeated after surgery (Figure 1C and D).