Author + information
- S1936879815020543-3f4b926a4c7c796f047bf550459481eeMohamed Laimoud,
- S1936879815020543-fb61be8aeb53dc7a4f704c8489a683d5Yasser Nassar,
- S1936879815020543-1f144bfe72788a6b597b1647da2032a6Akram Abdelbarre,
- S1936879815020543-da941c119a1386af9b143112bf998de7Walid Omar and
- S1936879815020543-247a1d0dba1847ab1a36464a802b8b39Helmy Elghawaby
Stent underexpansion is a major risk factor for in-stent restenosis and acute in-stent thrombosis . Intravascular ultrasound (IVUS) is the gold standard for detection of stent underexpansion. StentBoost (SB) is a recently developed technique that allows an improved angiographic visualization of the stent.
To compare stent expansion parameters by IVUS , SB enhancement and QCA and to evaluate the efficiency of SB guiding the stent postdilatation.
From June 2013 to August 2014, 33 stents (30 patients) were evaluated after eclective PCI using QCA, SB enhancement and IVUS .Optimization of stent deployment of inadequately expanded stents using balloon postdilatation was done then post dilatation reassessment using the previous 3 modalities.
The maximal SD measured by IVUS & SB was (3.45 ± 0.62 vs 3.55 ± 0.56 , p 0.53) respectively with correlation (p <0.0001 & r 0.74). the minimal SD measured by IVUS & SB was (2.77 ± 0.53 vs 2.58 ± 0.56, p 0.07) respectively with correlation (p <0.0001 & r 0.68). The maximal SD measured by IVUS & QCA (3.45 ± 0.62 vs 2.97 ± 0.59, p 0.009) respectively with correlation (p <0.0001 & r 0.69). The minimal SD measured by IVUS & QCA (2.77 ± 0.53 vs1.88 ± 0.60, p 0.001) respectively with correlation (p <0.0001 & r 0.63). The maximal SD measured by SB & QCA was (3.55 ± 0.56 vs 2.97 ± 0.59, p 0.001) respectively with correlation (p <0.0001& r 0.61). The minimal SD measured by SB & QCA was (2.58 ± 0.56 vs 1.88 ± 0.60, p 0.001) respectively with correlation (p 0.003 & r 0.49). the postdilatation stent diameters obtained by QCA, SB and IVUS were significantly higher than poststenting diameters.
Stent Boost enhancement has superior correlations for stent expansion measured by IVUS when compared with QCA. SB enhancement improved stent visualization and identify stent underexpansion and can guide stent postdilatation .
Key words: Quantitative coronary angiography (QCA), Intravascular ultrasound (IVUS), Stent Boost (SB) enhancement, stent diameter (SD).