Simplified ¹⁸F-FDG PET Myocardial Viability Preparation Protocol Reduces Hypoglycemia and Improves Workflow...

Area of Science:

• Nuclear Medicine
• Cardiology
• Medical Imaging

Background:

• 18F-FDG PET is crucial for identifying hibernating myocardium in ischemic heart disease.
• Conventional protocols require glucose loading and insulin, leading to risks like hypoglycemia and workflow inefficiencies.

Purpose of the Study:

• To develop and evaluate a simplified 18F-FDG PET protocol for myocardial viability imaging.
• The goal was to minimize hypoglycemia risk, improve workflow efficiency, and maintain image quality.

Main Methods:

• Retrospective analysis comparing 100 conventional protocol studies with 100 simplified protocol studies.
• The simplified protocol involves simultaneous glucose loading and IV insulin without a strict blood glucose target.
• Primary endpoints: hypoglycemia incidence and image quality; secondary endpoints: preparation/imaging times, glucose monitoring frequency.

Main Results:

• Hypoglycemia incidence decreased from 21% to 3% (P < 0.001).
• Preparation and imaging times were significantly reduced (e.g., time to 18F-FDG injection from 87 to 65 min; total imaging from 175 to 144 min).
• Image quality improved, with good-or-better quality rising from 81% to 87% (P = 0.03) and non-diagnostic studies decreasing.

Conclusions:

• The simplified 18F-FDG PET protocol offers a safer and more efficient approach to myocardial viability imaging.
• It effectively reduces hypoglycemia, shortens procedure times, and decreases glucose monitoring needs.
• The protocol maintains or enhances diagnostic image quality.