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Titolo:
MR flow measurement in the internal mammary artery-to-coronary artery bypass graft: Comparison with graft stenosis at radiographic angiography
Autore:
Ishida, N; Sakuma, H; Cruz, BP; Shimono, T; Tokui, T; Yada, I; Takeda, K; Higgins, CB;
Indirizzi:
Mie Univ, Sch Med, Dept Radiol, Tsu, Mie 5148507, Japan Mie Univ Tsu Mie Japan 5148507 Med, Dept Radiol, Tsu, Mie 5148507, Japan Mie Univ, Sch Med, Dept Thorac Surg, Tsu, Mie 5148507, Japan Mie Univ TsuMie Japan 5148507 Dept Thorac Surg, Tsu, Mie 5148507, Japan Univ Calif San Francisco, Med Ctr, Dept Radiol, San Francisco, CA 94143 USA Univ Calif San Francisco San Francisco CA USA 94143 ancisco, CA 94143 USA
Titolo Testata:
RADIOLOGY
fascicolo: 2, volume: 220, anno: 2001,
pagine: 441 - 447
SICI:
0033-8419(200108)220:2<441:MFMITI>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
DOPPLER ECHOCARDIOGRAPHY; NONINVASIVE ASSESSMENT; BLOOD-FLOW; PATENCY; VELOCITY; CONDUITS; SURGERY; RESERVE;
Keywords:
arteries, MR; arteries, stenosis or obstruction; coronary vessels, flow dynamics; coronary vessels, MR; magnetic resonance (MR), flow studies; stents and prostheses;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Ishida, N Mie Univ, Sch Med, Dept Radiol, 2-174 Edobashi, Tsu, Mie 5148507, Japan Mie Univ 2-174 Edobashi Tsu Mie Japan 5148507 Mie 5148507, Japan
Citazione:
N. Ishida et al., "MR flow measurement in the internal mammary artery-to-coronary artery bypass graft: Comparison with graft stenosis at radiographic angiography", RADIOLOGY, 220(2), 2001, pp. 441-447

Abstract

PURPOSE: To evaluate the sensitivity and specificity of breath-hold magnetic resonance (MR) flow measurement for detection of significant stenosis ininternal mammary artery bypass grafts. MATERIALS AND METHODS: Twenty-six consecutive patients who had undergone coronary artery bypass surgery were examined. Breath-hold velocity-encoded cine MR images were obtained at the midpoint of the internal mammary artery between its origin from the subclavian artery and the distal anastomosis tothe left anterior descending artery. RESULTS: MR images were obtained successfully in 24 patients. At conventional angiography, no significant stenosis was observed in 17 patients (groupA), and significant stenosis (diameter > 70%) was observed in seven patients (group B). The mean diastolic-to-systolic peak velocity ratio in group B(0.61 +/- 0.44 [SD]) was significantly lower than that in group A (1.88 +/- 0.96; P < .01). Evaluation of graft stenosis with the diastolic-to-systolic peak velocity ratio revealed a sensitivity of 86% and a specificity of 88%. The mean blood flow rate at baseline in group B (16.9 mL/min +/- 5.5) was significantly lower than that in group A (79.8 mL/min +/- 38.2; P < .01). The sensitivity and specificity of MR blood flow measurement in predicting significant stenosis were 86% and 94%, respectively. The mean pharmacologic flow reserve ratios were 2.00 +/- 1.43 in group A and 1.39 +/- 1.46 in group B (P > .05). CONCLUSION: Fast MR blood flow measurement at baseline is highly useful for predicting significant stenosis in internal mammary arterial grafts.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/04/20 alle ore 14:01:27