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Titolo:
Measuring maximal percent area stenosis poststent placement with intracoronary Doppler and the continuity equation and correlation with intracoronaryultrasound and angiography
Autore:
Al Suwaidi, J; Higano, ST; Holmes, DR; Rihal, CS; Lerman, A;
Indirizzi:
Mayo Clin & Mayo Fdn, Ctr Coronary Physiol & Imaging, Div Cardiovasc Dis, Rochester, MN 55905 USA Mayo Clin & Mayo Fdn Rochester MN USA 55905 Dis, Rochester, MN 55905 USA Mayo Clin & Mayo Fdn, Dept Internal Med, Rochester, MN 55905 USA Mayo Clin& Mayo Fdn Rochester MN USA 55905 Med, Rochester, MN 55905 USA
Titolo Testata:
AMERICAN JOURNAL OF CARDIOLOGY
fascicolo: 6, volume: 84, anno: 1999,
pagine: 650 - 654
SICI:
0002-9149(19990915)84:6<650:MMPASP>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORONARY-ARTERY DISEASE; INTRAVASCULAR ULTRASOUND; BALLOON ANGIOPLASTY; FLOW VELOCITY; THREATENED CLOSURE; BLOOD-FLOW; VALVE AREA; VALIDATION; ECHOCARDIOGRAPHY; GUIDANCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Lerman, A Mayo Clin, 200 1st St SW, Rochester, MN 55905 USA Mayo Clin 200 1st St SW Rochester MN USA 55905 ter, MN 55905 USA
Citazione:
J. Al Suwaidi et al., "Measuring maximal percent area stenosis poststent placement with intracoronary Doppler and the continuity equation and correlation with intracoronaryultrasound and angiography", AM J CARD, 84(6), 1999, pp. 650-654

Abstract

Quantitative coronary angiography (QCA) and intracoronary ultrasound (ICUS) are methods for anatomic assessment. of stent deployment. Intracoronary Doppler is primarily a method for the physiologic assessment of coronary stenoses, It correlates well with traditional noninvasive measurements of lesion significance, Intracoronary Doppler was used for the anatomic assessmentof de novo coronary artery stenosis with variable success; however, its use for anatomic assessment of adequate stent deployment is unavailable. A rapid, automated software program was developed based on a modified continuity equation to calculate the maximal in-stent percent area stenosis by comparing the maximal in-stent velocity to an average reference velocity (proximal and distal). This study was designed to compare the Dappler method of ananatomic assessment with QCA and ICUS in 15 patients. Physiologic success of stent deployment was determined by the distal coronary flow reserve to 24 to 36 mu g of intracoronary adenosine. Following successful stent deployment, distal coronary flow reserve increased significantly from a baseline of 1.6 +/- 0.5 to 2.9 +/- 1.1. There was a significant correlation between the maximal in-stent percent area stenosis as measured by Dappler and both QCA (r = 0.78, p <0.01) and ICUS (r = 0.84, p <0.01). This study demonstrates that maximal in-stent percent area stenosis can be measured by intracoronary Doppler and a novel software program. The intracoronary Doppler guide-wire method can assess the adequacy of stent deployment using both anatomic and physiologic principles and may supplement other quantitative methodologies. (C) 1999 by Excerpta Medica, Inc.

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Documento generato il 03/07/20 alle ore 01:12:37