| Significance of the Doppler-derived gradient across a residual aortic coarctation. | |
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MedLine Citation:
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PMID: 2304885 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Few data exist which address the significance of the Doppler gradient across a residual narrowing in older children who have had a coarctation repaired. Therefore, we evaluated 11 patients with repaired aortic coarctation with and without residual obstruction by Doppler echocardiography. The Doppler-derived transcoarctation pressure gradient correlated poorly with catheter-measured peak-to-peak and catheter maximal instantaneous gradients when only the maximal velocity across the repair was utilized in the simplified Bernoulli equation, [r = 0.73, standard of error of the estimate (SEE) = 5.0 mmHg and r = 0.56, SEE = 7.6 mmHg, respectively]. However, when the precoarctation velocity was included in the simplified Bernoulli equation, the correlation between Doppler-derived and catheter-measured gradients became excellent. The maximal Doppler gradient correlated well with catheter peak-to-peak gradient (r = 0.95, SEE = 2.2 mmHg) and catheter maximal instantaneous gradient (r = 0.94, SEE = 3.2 mmHg). However, the maximal Doppler gradient slightly overestimated the catheter peak-to-peak gradient and underestimated the catheter maximal instantaneous gradient. The Doppler mean gradient showed excellent correlation with the catheter mean gradient (r = 0.97, SEE = 0.85 mmHg). Precoarctation velocities were generally twofold greater than published normals due to a spatial acceleration phenomenon. All subjects had residual hypoplasia of the transverse aorta such that its transverse diameter was 29% less than, and its cross-sectional area was 50% less than, the ascending and descending aorta.(ABSTRACT TRUNCATED AT 250 WORDS) |
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Authors:
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A W Aldousany; T G DiSessa; B S Alpert; S E Birnbaum; E S Willey |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Pediatric cardiology Volume: 11 ISSN: 0172-0643 ISO Abbreviation: Pediatr Cardiol Publication Date: 1990 Jan |
Date Detail:
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Created Date: 1990-03-29 Completed Date: 1990-03-29 Revised Date: 2008-02-20 |
Medline Journal Info:
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Nlm Unique ID: 8003849 Medline TA: Pediatr Cardiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 8-14 Citation Subset: IM |
Affiliation:
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Department of Pediatrics, University of Tennessee, School of Medicine, Memphis. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Aortic Coarctation / diagnosis*, physiopathology, surgery Blood Flow Velocity Child Child, Preschool Echocardiography, Doppler / methods* Female Heart Catheterization Humans Infant Male Postoperative Complications / diagnosis, physiopathology |
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