diagonal branch
A side branch arising from the left anterior descending artery, numbered sequentially from proximal to distal.
Full Definition
Diagonal branches are important side branches that arise from the left anterior descending (LAD) coronary artery and supply the anterolateral wall of the left ventricle. These branches are numbered sequentially (D1, D2, D3, etc.) from proximal to distal along the LAD. The first diagonal branch (D1) is often the largest and most clinically significant, sometimes rivaling the LAD in size. Diagonal branches are frequently involved in bifurcation lesions requiring specialized intervention techniques. Their anatomical relationship to the LAD makes them susceptible to compromise during main vessel stenting, necessitating careful procedural planning and potential side branch protection strategies.
Usage
Usage note: Use standardized numbering system (D1, D2) in anatomical descriptions.
In Context
- "The large diagonal branch was protected with a guidewire during LAD stent deployment." — Bifurcation intervention report
- "Significant diagonal branch compromise occurred after main vessel stenting, requiring bailout intervention." — Complication management note