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Intravascular ultrasound images as an essential tool to assist left main operating strategy.

Intravascular ultrasound (IVUS) remains the only tool to understand, plan and evaluate complex lesions in percutaneous coronary intervention (PCI). Despite the evidence for left main intervention, 1 it is routinely used mainly to validate the final results in terms of optimal expansion of the stent. In this case report, we wish to highlight the role of IVUS guidance in the decision-making process throughout the PCI procedure.