aortic growth rate
The rate of aortic diameter increase over time, typically measured in millimeters per year. Used to guide timing of surgical intervention in aortic aneurysms.
Full Definition
Aortic growth rate quantifies the progression of aortic dilatation over time and is a critical parameter in managing patients with aortic aneurysms. The growth rate is typically expressed as millimeters of diameter increase per year and is calculated from serial imaging studies performed at regular intervals. Normal aortic growth rates are generally less than 1-2mm per year, while accelerated growth rates above 3-5mm per year may indicate unstable aneurysms requiring urgent intervention. Growth rate assessment helps clinicians balance the risks of rupture against the risks of surgical intervention and is incorporated into most guidelines for aortic aneurysm management. Factors that may accelerate growth include hypertension, smoking, genetic conditions, and aortic wall inflammation.
Usage
Usage note: Always specify time interval and measurement method when documenting growth rates.
In Context
- "The aneurysm showed an accelerated growth rate of 4mm per year on serial CT scans." — Vascular surgery consultation
- "Stable growth rate of 1mm annually allowed continued conservative management." — Surveillance imaging report