Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
2D-Phase contrast flow evaluation and contrast-enhanced MR angiography forperioperative assessment of Internal mammary artery grafts.
Autore:
Stauder, NI; Miller, S; Scheule, AM; Brechtel, K; Eckstein, FS; Hahn, U; Kramer, U; Duda, SH; Claussen, CD;
Indirizzi:
Univ Tubingen, Abt Radiol Diagnost, D-72076 Tubingen, Germany Univ Tubingen Tubingen Germany D-72076 agnost, D-72076 Tubingen, Germany Univ Tubingen, Abt Thorax Herz & Gefasschirurg, D-72074 Tubingen, Germany Univ Tubingen Tubingen Germany D-72074 hirurg, D-72074 Tubingen, Germany
Titolo Testata:
ROFO-FORTSCHRITTE AUF DEM GEBIET DER RONTGENSTRAHLEN UND DER BILDGEBENDEN VERFAHREN
fascicolo: 9, volume: 173, anno: 2001,
pagine: 790 - 797
SICI:
1438-9029(200109)173:9<790:2CFEAC>2.0.ZU;2-2
Fonte:
ISI
Lingua:
GER
Soggetto:
MAGNETIC-RESONANCE ANGIOGRAPHY; AORTOCORONARY BYPASS GRAFTS; CORONARY ANGIOGRAPHY; BLOOD-FLOW; PATENCY; QUANTIFICATION; CONDUITS; ACCURACY;
Keywords:
magnetic resonance imaging; IMA grafts; MR angiography; MR flow quantification; myocardial function;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Stauder, NI Univ Tubingen, Abt Radiol Diagnost, Hoppe Seyler Str 3, D-72076 Tubingen, Germany Univ Tubingen Hoppe Seyler Str 3 Tubingen Germany D-72076 any
Citazione:
N.I. Stauder et al., "2D-Phase contrast flow evaluation and contrast-enhanced MR angiography forperioperative assessment of Internal mammary artery grafts.", ROFO-F RONT, 173(9), 2001, pp. 790-797

Abstract

Purpose: To evaluate LV functional parameters, graft flow and patency in patients with IMA grafts using a combined MR protocol with phase-contrast technique and contrast enhanced MR angiography. Material and Methods: Using a1.5 T MR system 27 patients with 27 left internal mammary artery (LIMA) and 41 venous grafts were examined before and 6 months after CABG surgery. A T(1)w-TSE sequence (slice thickness 5 mm) was applied for morphological imaging. LV function (EF, CO) was evaluated on cine images (segmented FLASH 2D, TReff 11 ms, TE 4.8 ms, flip angle 25 degrees). A phase-contrast FLASH 2D(TR 24 ms, TE 5 ms, flip angle 20 degrees) sequence was applied for aorticand IMA flow measurements. Postoperatively, a contrast enhanced FLASH 3D MR angiography (TR 3.8 ms, TE 1.4 ms, flip angle 30 degrees) with 25 ml Gd-DTPA was performed to assess bypass patency. Results: In patients with reduced IV function (ejection fraction < 50 %) an improvement of the ejection fraction from 38.4+/-10.3% to 49.8+/-15.3% (p < 0.05) was found postoperatively. LIMA grafts were occluded in 1/27 patients, while 6/41 venous grafts were occluded. Distal LIMA anastomoses were demonstrated in 33% by MRA. Flow of LIMA decreased from 21.2+/-11 ml/min/m(2) preoperatively to 14.4+/-9.6 ml/min/m(2) postoperatively (p < 0.01). Conclusion: MR imaging allows accurate combined assessment of IV function, bypass patency and flow. The protocol of this study may be applicable for perioperative follow-up studies in patients after CABG surgery.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/01/20 alle ore 00:53:55