TCT-51 IVUS Predictors of Stent Expansion in Severely Calcified Lesions

Severe calcium (Ca) often but not always limits stent expansion. We sought to develop an intravascular ultrasound (IVUS) Ca score that predicts stent underexpansion (ST-UEx) in lesions with severe Ca. A total of 77 lesions in 77 patients with max pre-percutaneous coronary intervention (PCI) Ca arc