The primary efficacy endpoint was device success (technical success with a final stent expansion ≥ 80%). Thirty days device-oriented composite endpoint (DOCE: cardiac death, target lesion revascularization, or target vessel myocardial infarction) was the secondary endpoint. conditions: Coronary Artery Calcification conditions: Intravascular Lithotripsy conditions: Excimer Laser-coronary Atherectomy conditions: Stent Restenosis conditions: Stent Occlusion studyType: OBSERVATIONAL observationalModel: COHORT timePerspective: CROSS_SECTIONAL count: 121 type: ACTUAL name: Stent Underexpansion measure: The primary efficacy endpoint was device success measure: Device-oriented composite endpoint (DOCE) sex: ALL stdAges: CHILD stdAges: ADULT stdAges: OLDER_ADULT facility: Unit of Structural Interventional Cardiology, Department of Clinical and Experimental Medicine, Careggi University Hospital city: Florence country: Italy lat: 43.77925 lon: 11.24626 facility: Fabrizio D'Ascenzo city: Turin country: Italy lat: 45.07049 lon: 7.68682 facility: Department of Invasive Cardiology, Medical University of Bialystok, The Medical University of Bialystok Clinical Hospital city: Białystok country: Poland lat: 53.13333 lon: 23.16433 facility: First Department of Cardiology, Medical University of Gdansk, Gdansk, Poland city: Gdańsk country: Poland lat: 54.35205 lon: 18.64637 facility: Department of Cardiology and Structural Heart Diseases, Medical University of Silesia, Katowice, Poland city: Katowice zip: 40-635 country: Poland lat: 50.25841 lon: 19.02754 facility: Jacek Legutko city: Kraków country: Poland lat: 50.06143 lon: 19.93658 facility: Second Department of Cardiology, Jagiellonian University Medical College, Krakow, Poland city: Kraków country: Poland lat: 50.06143 lon: 19.93658 facility: 1st Military Hospital in Lublin, Lublin, Poland city: Lubin country: Poland lat: 51.40089 lon: 16.20149 facility: Department of Cardiology, Copper Health Centre (MCZ) city: Lubin country: Poland lat: 51.40089 lon: 16.20149 facility: Clinical Department of Interventional Cardiology, Medical University of Lublin city: Lublin country: Poland lat: 51.25 lon: 22.56667 facility: Department of Cardiology, University Hospital, Institute of Medical Sciences city: Opole country: Poland lat: 50.67211 lon: 17.92533 facility: Department of Cardiology, Poznan University of Medical Sciences city: Poznań country: Poland lat: 52.40692 lon: 16.92993 facility: Department of Cardiology, The Ministry of Internal Affairs and Administration Hospital, Rzeszow city: Rzeszów country: Poland lat: 50.04132 lon: 21.99901 facility: 1st Department of Cardiology, Medical University of Warsaw city: Warsaw country: Poland lat: 52.22977 lon: 21.01178 facility: Department of Cardiology and Internal Diseases, Military Institute of Medicine city: Warsaw country: Poland lat: 52.22977 lon: 21.01178 facility: Department of Interventional Cardiology and Angiology, National Institute of Cardiology, Warsaw, Poland city: Warszawa country: Poland lat: 52.22977 lon: 21.01178 facility: Department of Invasive Cardiology, Centre of Postgraduate Medical Education, Central Clinical Hospital of the Ministry of Interior and Administration city: Warszawa country: Poland lat: 52.22977 lon: 21.01178 facility: Department of Invasive Cardiology, Wejherowo city: Wejherowo country: Poland lat: 54.60568 lon: 18.23559 facility: Centre for Heart Disease, University Hospital Wroclaw Department of Heart Disease, Wroclaw Medical University city: Wrocław country: Poland lat: 51.1 lon: 17.03333 facility: Third Department of Cardiology, Medical University of Katowice city: Zabrze country: Poland lat: 50.32492 lon: 18.78576 hasResults: False