Myocardial viability imaging: does it still have a role in patient selection prior to coronary revascularisation?

Area of Science:

• Cardiology
• Medical Imaging
• Cardiac Surgery

Background:

• Patients with severe left ventricular (LV) dysfunction and multi-vessel coronary artery disease (CAD) face high risks during revascularization but may benefit most.
• Historically, assessing myocardial viability ('stunned' or 'hibernating' myocardium) has been crucial for revascularization decisions.
• Recent studies question the established role of viability testing in this high-risk patient group.

Purpose of the Study:

• To review the current position and optimal incorporation of myocardial viability testing in modern coronary revascularization strategies.
• To examine the role of available imaging modalities in assessing myocardial viability.
• To discuss the ongoing debate regarding the necessity of viability testing for revascularization decisions.

Main Methods:

• Literature review of recent studies and clinical trials.
• Analysis of the utility of various imaging modalities for viability assessment.
• Examination of the impact of viability testing on revascularization decision-making.

Main Results:

• Myocardial viability testing remains relevant for revascularization decisions in select patient populations.
• Current imaging modalities offer valuable insights into myocardial viability.
• The precise role and impact of viability testing on clinical outcomes require further investigation through large-scale randomized trials.

Conclusions:

• Myocardial viability testing continues to be an important factor in guiding revascularization strategies for patients with LV dysfunction and CAD.
• Further large-scale randomized trials focusing on clinical outcomes are essential to definitively establish the role of viability testing.
• Integrating viability assessment with other clinical factors is key in the modern era of coronary revascularization.