Small Vessels, Big Decisions

Percutaneous coronary intervention (PCI) in small-caliber vessels remains one of the most challenging scenarios in contemporary interventional cardiology.

Historically, a small vessel was considered to be one with a diameter ≤2.75 mm. With the technological evolution of devices and the greater refinement of interventional techniques, this concept has been progressively redefined. In contemporary practice, small vessels are standardized as those with a diameter <2.5 mm, while very small or extremely small vessels often include segments <2.25 mm.^,

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