Anatomic features in SCAD assessed by CCT: A propensity score matching case control study

Area of Science:

• Cardiology
• Medical Imaging
• Biomechanical Engineering

Background:

• Spontaneous coronary artery dissection (SCAD) can affect individuals without traditional cardiovascular risk factors.
• Understanding the anatomical predispositions to SCAD is crucial for risk stratification and prevention.

Purpose of the Study:

• To investigate the anatomical features of coronary arteries in patients with SCAD.
• To compare these features with those of healthy individuals using coronary arteries computed tomography (CCT).

Main Methods:

• Retrospective analysis of CCT scans from 11 SCAD patients and 11 matched healthy controls.
• Evaluation of anatomical parameters including left main (LM) length, angles between coronary arteries, ostial distances, and vessel tortuosity.
• Fluid dynamic analysis to assess shear stress on vessel walls.

Main Results:

• SCAD patients exhibited significantly shorter LM length and a sharper angle between the left anterior descending (LAD) artery and its first branch compared to controls.
• A higher tortuosity score was observed in the SCAD group.
• Fluid dynamics revealed that angles less than 90 degrees at the first bifurcation, combined with high tortuosity, can increase vessel wall strain.

Conclusions:

• Coronary artery tortuosity and specific branching angles may contribute to increased shear stress.
• These biomechanical factors are implicated in the pathogenesis of SCAD.