title: Renal hemodynamics: theory and practical tips.
abstract: The angiographic assessment of renal artery stenosis (RAS) is often difficult and not reliable. A hyperemic systolic pressure gradient (HSPG) >20 mm Hg provides the highest concordance rate of 100% with an intravascular ultrasound (IVUS) minimal lumen cross sectional area <8.6 mm(2) to predict the severity of RAS. We present 4 cases in whom the role of HSPG and IVUS compared with angiography for the assessment of the severity of RAS is discussed.
authors: Division of Cardiology, University of Louisville, Louisville, Kentucky 40292, USA.
authors: Tariq S
authors: TS
authors: Siddiqui
authors: Ziad
authors: Z
authors: Elghoul
authors: Syed T
authors: ST
authors: Reza
authors: Massoud A
authors: MA
authors: Leesar
mesh_terms: D000368:Aged; D000959:Antihypertensive Agents / Q000627:therapeutic use; D001794:Blood Pressure; D005260:Female; D006801:Humans; D006978:Hypertension, Renovascular / Q000188:drug therapy / Q000209:etiology* / Q000473:pathology / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012078:Renal Artery Obstruction / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery; D012079:Renal Circulation; D015203:Reproducibility of Results; D012107:Research Design; D012720:Severity of Illness Index; D015607:Stents; D016896:Treatment Outcome; D018084:Ultrasonography, Interventional; D014656:Vascular Surgical Procedures / Q000295:instrumentation
chemical_list: D000959:Antihypertensive Agents