Steven W. Fitzgerald
Northwestern University
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Featured researches published by Steven W. Fitzgerald.
Circulation | 1998
Kishin Ramani; Robert M. Judd; Thomas A. Holly; Todd B. Parrish; Vera H. Rigolin; Michele Parker; Cathy Callahan; Steven W. Fitzgerald; Robert O. Bonow; Francis J. Klocke
BACKGROUND The utility of contrast MRI for assessing myocardial viability in stable coronary artery disease (CAD) with left ventricular dysfunction is uncertain. We therefore performed cine and contrast MRI in 24 stable patients with CAD and regional contractile abnormalities and compared MRI findings with rest-redistribution 201Tl imaging and dobutamine echocardiography. METHODS AND RESULTS Delayed MRI contrast enhancement patterns were examined from 3 to 15 minutes after injection of 0.1 mmol/kg IV gadolinium diethylenetriamine pentaacetic acid (Gd-DTPA). Comparable MRI and 201Tl basal and midventricular short-axis images were subdivided into 6 segments. Segments judged nonviable by quantitative and qualitative assessment of 201Tl scans showed persistent, systematically greater MRI contrast signal intensity than segments judged viable (P</=0.002). Delayed contrast hyperenhancement also occurred in segments judged nonviable by dobutamine echocardiography (P</=0.03). The presence or absence of hyperenhancement correlated most closely with nonviability and viability, respectively, in segments that were akinetic or dyskinetic under resting conditions (83% concordance with 201Tl in both cases). In segments with resting hypokinesis, 58% of segments showing hyperenhancement were judged viable by 201Tl and may have represented an admixture of scar tissue and viable myocardium. CONCLUSIONS Delayed (by 3 to 15 minutes) hyperenhancement of Gd-DTPA contrast-enhanced MRI images occurs frequently in dysfunctional areas of the left ventricle in patients with stable CAD. Hyperenhancement is associated with nonviability by rest-redistribution 201Tl scintigraphy and dobutamine echocardiography, particularly in regions exhibiting resting akinesis/dyskinesis. The absence of hyperenhancement correlates with radionuclide and echocardiographic determinations of viability, regardless of resting contractile function.
Urologic Radiology | 1991
Robert Pinsk; Albert A. Nemcek; Steven W. Fitzgerald
The authors describe computed tomographic (CT) and magnetic resonance (MR) imaging of coexistent anomalies of the inferior vena cava and renal venous system. These were particularly relevant due to the presence of a renal neoplasm which invaded an anomalous renal vein.
The Radiologist | 2002
Frank H. Miller; Anthony J. Peduto; Caroline M. Hwang; Frederick L. Hoff; Andrew H. Sonin; Steven W. Fitzgerald
Adult fibromatoses comprise a diverse group of benign fibrous tissue proliferations that have behavioral characteristics between those of benign fibrous lesions and those of fibrosarcoma. Adult fibromatoses are classified according to anatomic location and clinical manifestations into two broad grou
American Journal of Roentgenology | 1993
M D Kirsch; Steven W. Fitzgerald; H. Friedman; Lee F. Rogers
Radiology | 1994
Andrew H. Sonin; Steven W. Fitzgerald; Harold Friedman; Frederick L. Hoff; Ronald W. Hendrix; Lee F. Rogers
Radiographics | 1995
Andrew H. Sonin; Steven W. Fitzgerald; Frederick L. Hoff; H. Friedman; M. E. Bresler
Radiographics | 1992
E. M. Remer; Steven W. Fitzgerald; H. Friedman; Lee F. Rogers; Ronald W. Hendrix; Michael F. Schafer
American Journal of Roentgenology | 1998
Frank H. Miller; Reni S. Butler; Frederick L. Hoff; Steven W. Fitzgerald; Albert A. Nemcek; Richard M. Gore
Radiology | 1994
Steven W. Fitzgerald; D R Curry; S J Erickson; S F Quinn; H Friedman
American Journal of Roentgenology | 1991
Albert A. Nemcek; Frank H. Miller; Steven W. Fitzgerald