Three-Dimensional Myocardial Perfusion Maps by Contrast Echocardiography

Area of Science:

• Cardiology
• Medical Imaging
• Echocardiography

Background:

• Assessing myocardial perfusion is crucial for diagnosing and managing coronary artery disease.
• Traditional methods may lack detailed spatial resolution for evaluating coronary artery territories.

Purpose of the Study:

• To evaluate the clinical applicability of a novel 3-D perfusion mapping system using myocardial contrast echocardiography (MCE).
• To assess the system's ability to visualize left ventricular (LV) myocardial perfusion from major coronary arteries before and after intervention.

Main Methods:

• A 3-D perfusion mapping system was applied to 12 patients undergoing chronic total coronary occlusion intervention.
• Three-dimensional perfusion maps were reconstructed from standard apical views following left coronary artery (LCA) and right coronary artery (RCA) injections.
• Myocardial segments were classified based on their vascular supply from major coronary arteries and collaterals.

Main Results:

• The 3-D system successfully reconstructed perfusion maps of the 16 standard LV segments.
• Myocardial segments were categorized into those supplied by one artery, collaterals, or neither.
• Post-intervention, the system visualized blood flow redistribution by each major coronary artery in 3-D.

Conclusions:

• The 3-D MCE perfusion mapping system is clinically applicable and feasible with current ultrasound equipment.
• This approach provides an estimate of each major coronary artery's contribution to LV perfusion.
• The system aids in evaluating the impact of coronary angioplasty on myocardial blood flow distribution.