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Titolo:
Minimally invasive evaluation of coronary stents with electron beam computed tomography: In vivo and in vitro experience
Autore:
Mohlenkamp, S; Pump, H; Baumgart, D; Haude, M; Gronemeyer, DHW; Seibel, RMM; Schwartz, RS; Erbel, R;
Indirizzi:
Mayo Clin, SMH, Dept Physiol & Biophys, Rochester, MN 55095 USA Mayo ClinRochester MN USA 55095 ysiol & Biophys, Rochester, MN 55095 USA Mayo Clin, Dept Cardiovasc Dis, Rochester, MN 55095 USA Mayo Clin Rochester MN USA 55095 Cardiovasc Dis, Rochester, MN 55095 USA Univ Witten Herdecke, Inst Intervent & Diagnost Radiol, Mulheim, Germany Univ Witten Herdecke Mulheim Germany Diagnost Radiol, Mulheim, Germany Univ GH Essen, Dept Cardiol, Essen, Germany Univ GH Essen Essen GermanyUniv GH Essen, Dept Cardiol, Essen, Germany Univ Witten Herdecke, Dept Radiol & Microtherapy, Bochum, Germany Univ Witten Herdecke Bochum Germany iol & Microtherapy, Bochum, Germany
Titolo Testata:
CATHETERIZATION AND CARDIOVASCULAR INTERVENTIONS
fascicolo: 1, volume: 48, anno: 1999,
pagine: 39 - 47
SICI:
1522-1946(199909)48:1<39:MIEOCS>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
BALLOON-EXPANDABLE-STENT; PALMAZ-SCHATZ STENTS; EXERCISE ELECTROCARDIOGRAPHY; ARTERY DISEASE; FOLLOW-UP; ANGIOPLASTY; RESTENOSIS; ECHOCARDIOGRAPHY; STENOSIS; PTCA;
Keywords:
EBCT; coronary stents; noninvasive imaging;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Mohlenkamp, S Mayo Clin, SMH, Dept Physiol & Biophys, Alfred 2-406, Rochester, MN 55095 USA Mayo Clin Alfred 2-406 Rochester MN USA 55095 , MN 55095 USA
Citazione:
S. Mohlenkamp et al., "Minimally invasive evaluation of coronary stents with electron beam computed tomography: In vivo and in vitro experience", CATHET C IN, 48(1), 1999, pp. 39-47

Abstract

We sought to describe the value of electron beam computed tomography (EBCT) to detect stent restenoses at follow-up and to identify characteristic EBCT features of coronary stents. Six coronary stents (GRII, Jostent, NIR, PS, Micro, Wiktor) were scanned in vitro (10 1.5-mm-thick slices, 15-cm FoV, 100-ms AT) before and after inflation with 3.0-, 3.5-, and 4.0 mm balloons to study intensity values and different stent dimensions in comparison to caliper measurements, In 44 patients (60 +/- 10 years, 4 females) we prospectively compared EBCT findings [eight 8-mm-thick slices in the flow mode, 26-cm field of view (FoV), 50 ms acquisition time (AT)] with 6-month angiographic outcome after placement of 86 stents in 49 vessels. Far the detection of significant angiographic luminal narrowing (greater than or equal to 75%) that occurred in 17/49 vessels (35%), we found a sensitivity of 65%, a specificity of 84%, and a positive and negative predictive value of 69% and 82%, respectively. The in vitro data show significant differences in image intensity between the stents and a significant gradual decrease in image intensity with increasing stent diameters, The mean differences between EBCT and caliper measurements for the length and diameter were 0.17 +/- 0.18 mm and -0.32 +/- 0.25mm, respectively. EBCT is currently the only noninvasive technique that allows the assessment of stent dimensions and stent geometry,which may prove useful in patients when intravascular ultrasound cannot beperformed. Contrast-enhanced EBCT is a promising tool for minimally invasive stent patency evaluation at follow-up, especially in patients that are unable to exercise. (C) 1999 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/03/20 alle ore 23:19:02