Myocardial Perfusion Imaging: A Brief Review of Nuclear and Nonnuclear Techniques and Comparative Evaluation of...

Area of Science:

• Cardiology
• Medical Imaging

Background:

• Coronary artery disease (CAD) is a major global health concern, leading to significant morbidity and mortality.
• Myocardial perfusion abnormalities are early indicators in CAD pathogenesis, preceding other clinical signs.
• Myocardial perfusion imaging (MPI) assesses the cumulative impact of CAD on the heart's vasculature and function.

Purpose of the Study:

• To review various MPI modalities for diagnosing and assessing the severity of CAD.
• To compare the performance of different MPI techniques against each other and invasive coronary angiography (ICA).
• To highlight the role of MPI in early, asymptomatic CAD detection and evaluating functional significance.

Main Methods:

• Review of established and emerging MPI techniques including cardiac SPECT, PET, MRI, CT perfusion, and myocardial contrast echocardiography.
• Comparison of diagnostic performance and clinical utility of these modalities.
• Evaluation of MPI's role in detecting early myocardial perfusion abnormalities.

Main Results:

• MPI visualizes the overall burden of ischemic heart disease (IHD) by evaluating myocardial perfusion.
• Early detection of perfusion deficits through MPI, followed by risk factor intervention, shows potential for restoring perfusion.
• Various MPI modalities offer noninvasive assessment of CAD, complementing traditional methods like ICA.

Conclusions:

• MPI is crucial for noninvasive diagnosis of early and established CAD, assessing functional significance.
• Restoration of myocardial perfusion through early detection and intervention may reduce CAD-related morbidity and mortality.
• Ongoing development of novel MPI techniques promises improved diagnostic capabilities for CAD.