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Titolo:
Usefulness of flow reserve in the left internal mammary artery to determine graft patency to the left anterior descending coronary artery
Autore:
Voudris, V; Athanassopoulos, G; Vassilikos, V; Avramides, D; Manginas, A; Michalis, A; Cokkinos, DV;
Indirizzi:
Onassis Cardiac Surg Ctr, Cardiol Dept 1, Athens 17674, Greece Onassis Cardiac Surg Ctr Athens Greece 17674 ept 1, Athens 17674, Greece Onassis Cardiac Surg Ctr, Cardiac Surg 2, Athens 17674, Greece Onassis Cardiac Surg Ctr Athens Greece 17674 urg 2, Athens 17674, Greece
Titolo Testata:
AMERICAN JOURNAL OF CARDIOLOGY
fascicolo: 8, volume: 83, anno: 1999,
pagine: 1157 - 1163
SICI:
0002-9149(19990415)83:8<1157:UOFRIT>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
DOPPLER GUIDE-WIRE; BLOOD-FLOW; NONINVASIVE ASSESSMENT; VELOCITY DYNAMICS; BYPASS GRAFTS; ECHOCARDIOGRAPHY; ANGIOPLASTY; CIRCULATION; ADENOSINE; HUMANS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Voudris, V Onassisecerdiac Surg Ctr, Cardiol Dept 1, 356 Sygrou Ave, Athens 17674, Gre Onassis Cardiac Surg Ctr 356 Sygrou Ave Athens Greece 17674 re
Citazione:
V. Voudris et al., "Usefulness of flow reserve in the left internal mammary artery to determine graft patency to the left anterior descending coronary artery", AM J CARD, 83(8), 1999, pp. 1157-1163

Abstract

Two-dimensional Doppler echocardiography (DE) and intravascular Doppler-tipped guidewire (flowire) have been used to measure flow in aortocoronary conduits at rest and during hyperemia, but they have not been compared. We investigated which flow velocity parameters obtained with these 2 different techniques can predict left internal mammary artery (LIMA) graft patency. Twenty-nine patients with previous coronary artery bypass grafting referred for evaluation of symptoms of coronary artery disease were studied after cardiac catheterization using the flowire and DE. Proximal LIMA graft flow velocity wets measured at rest and during hyperemia produced by 140 mu g/kg/min of intravenous adenosine infusion over 6 minutes with both methods. Normal LIMA grafts and left anterior descending artery (LAD) distal to the anastomosis were present in 16 patients, whereas 13 had >70% graft or native vessel stenosis. The coronary flow velocity reserve (r = 0.79) and the diastolic-to-systolic velocity ratio during hyperemia (r = 0.73) correlated very well between the 2 techniques. Among the variables obtained with the 2 techniques, the intragraft coronary flow velocity reserve measured by both methods was the only independent predictor of graft/recipient LAD potency. This variable had a sensitivity and specificity of 86% at a cutoff point of 2.07with the flowire method and 83% at a cutoff point of 1.54 with DE. The areas below the receiver-operating characteristic curves were 0.91 and 0.93, respectively. Coronary flow velocity reserve measurements obtained with DE appears a reliable noninvasive method for assessing LIMA graft and/or LAD distal to the anastomosis patency in patients after bypass surgery and correlate very well with those directly obtained by intravascular Doppler. (C)1999 by Excerpta Medica, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 02:10:53