Virtual histology imaging in acute coronary syndromes: useful or just a research tool?

Area of Science:

• Cardiovascular Medicine
• Medical Imaging
• Pathology

Background:

• Acute coronary syndromes (ACS) are a major cause of death, often linked to atherosclerotic plaque rupture and thrombosis.
• Traditional understanding attributes ACS to a common culprit lesion mechanism, despite percutaneous coronary intervention (PCI).
• Existing knowledge on culprit lesions primarily stems from post-mortem studies.

Purpose of the Study:

• To review the role of intravascular ultrasound (IVUS) with virtual histology (VH) in characterizing atherosclerotic plaques.
• To explore how VH-IVUS can improve the invasive treatment of patients with acute coronary syndromes.
• To discuss the potential of VH-IVUS in identifying variations in culprit lesion morphology.

Main Methods:

• Utilizing spectral analysis of radiofrequency ultrasound backscatter signals.
• In-vivo delineation of atherosclerotic plaque components, including necrotic core and fibrous atheroma.
• Reviewing existing literature on VH-IVUS and its application in ACS.

Main Results:

• Virtual histology (VH) allows in-vivo identification of atherosclerotic plaque components.
• Evidence suggests morphological variations in culprit lesions, challenging a single pathological mechanism.
• VH-IVUS provides detailed insights into plaque characteristics associated with ACS.

Conclusions:

• Intravascular ultrasound (IVUS) with virtual histology (VH) offers valuable in-vivo information about culprit lesions.
• Understanding plaque morphology variations can refine the invasive treatment strategies for ACS.
• VH-IVUS holds significant potential for advancing the management of acute coronary syndromes.