minimal luminal diameter
Also written as: MLD — Minimal Luminal Diameter
The narrowest point of a coronary artery segment as measured by quantitative coronary angiography.
Full Definition
Minimal luminal diameter (MLD) is a quantitative angiographic measurement representing the smallest internal diameter of a coronary artery at its most stenotic point. This measurement is crucial in assessing the severity of coronary artery disease and evaluating the effectiveness of interventional procedures. MLD is typically measured in millimeters and serves as an objective parameter for determining procedural success and long-term outcomes. Changes in MLD between pre-procedure, post-procedure, and follow-up angiograms provide important insights into acute procedural results and restenosis patterns. The measurement requires careful calibration using the catheter diameter as a reference standard.
Usage
Usage note: Always express MLD measurements in millimeters with appropriate precision.
In Context
- "The minimal luminal diameter increased from 0.8 mm to 2.9 mm post-procedure." — Angiographic analysis report
- "Follow-up angiography showed a minimal luminal diameter of 2.1 mm." — Clinical follow-up study