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Patterns of calcification in coronary artery disease. A statistical analysis of intravascular ultrasound and coronary angiography in 1155 lesions The effect of complete percutaneous revascularisation with and without intravascular ultrasound guidance in the drugeluting stent era Assessment Of Proximal Left Anterior Descending Artery Size By Intravascular Ultrasound For Optimal Stent Sizing Meta-analysis of outcomes after intravascular ultrasound-guided versus angiography-guided drug-eluting stent implantation in 26,503 patients enrolled in three randomized trials and 14 observational studies Clinical impact of intravascular ultrasound guidance in drug-eluting stent implantation for unprotected left main coronary disease: pooled analysis at the patient-level of 4 registries Usefulness of intravascular ultrasound to predict outcomes in short-length lesions treated with drug-eluting stents Intravascular ultrasound-guided drug-eluting stent implantation: An updated meta-analysis of randomized control trials and observational studies Incidence and Clinical Outcomes of Stent Fractures on the Basis of 6,555 Patients and 16,482 Drug-Eluting Stents From 4 Centers Impact of the Use of Intravascular Imaging on Patients Who Underwent Orbital Atherectomy Use of Intravascular Ultrasound Imaging in Percutaneous Coronary Intervention to Treat Left Main Coronary Artery Disease
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Original Research2011 Jun;4(3):239-47.

JOURNAL：Circ Cardiovasc Interv. Article Link

Intravascular ultrasound findings of early stent thrombosis after primary percutaneous intervention in acute myocardial infarction: a Harmonizing Outcomes with Revascularization and Stents in Acute Myocardial Infarction (HORIZONS-AMI) substudy

Choi SY, Witzenbichler B, Maehara A et al. Keywords: stents; thrombosis; ultrasonics;myocardial infarction

ABSTRACT

BACKGROUND - Small stent area and residual inflow/outflow disease have been reported as the strongest intravascular ultrasound (IVUS) predictors of early stent thrombosis (ST) in patients with stable angina. IVUS predictors of early ST in patients with acute myocardial infarction have not been studied.


METHODS AND RESULTS - In the Harmonizing Outcomes with Revascularization and Stents in Acute Myocardial Infarction (HORIZONS-AMI) study, a formal substudy included poststent and 13-month follow-up IVUS at 36 centers. Twelve patients with baseline IVUS who had definite/probable early ST ≤30 days after enrollment were compared with 389 patients without early ST. Significant residual stenosis was a lumen area <4.0 mm(2) with ≥70% plaque burden ≤10 mm from each stent edge. Significant edge dissection was more than medial dissection with lumen area <4 mm(2) or dissection angle ≥60°. Randomization to bivalirudin (P=0.29) or paclitaxel-eluting stent (P=0.74) was not related to early ST. Minimum lumen area was smaller in patients with versus without early ST (4.4 mm(2) [3.6, 6.9] versus 6.7 mm(2) [5.3, 8.0], respectively, P=0.014). Minimum lumen area <5 mm(2), significant residual stenosis, significant stent edge dissection, and significant tissue (plaque/thrombus) protrusion (more than the median that narrowed the lumen to <4 mm(2)) were more prevalent in patients with early ST, but significant acute malapposition (more than the median) was not. Overall, 100% of patients with early ST had at least 1 of these significant features: minimum lumen area <5 mm(2), edge dissection, residual stenosis, or tissue protrusion versus 23% in patients without early ST (P<0.01).

CONCLUSIONS - Smaller final lumen area and inflow/outflow disease (residual stenosis or dissection) but not acute malapposition were related to early ST after acute myocardial infarction intervention.

CLINICAL TRIAL REGISTRATION - URL: http://www.clinicaltrials.gov. Unique identifier: NCT00433966.
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