| Assessment of left ventricular outflow in hypertrophic cardiomyopathy using anyplane and paraplane analysis of three-dimensional echocardiography. | |
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MedLine Citation:
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PMID: 8752194 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study analyzes the alterations in size and geometry of the left ventricular (LV) outflow tract that occur in hypertrophic cardiomyopathy (HC) using transthoracic 3-dimensional echocardiography. Transthoracic 3-dimensional echocardiography was performed in 17 patients with HC (4 after myectomy) and in 10 normal subjects. Images were acquired with the rotational approach, with electrocardiographic and respiratory gating. From the 3-dimensional datasets, short-axis parallel slicing of the LV outflow tract at a 1mm distance was performed at the onset of systole. For each slice, cross-sectional area and maximal and minimal diameter were calculated. Reconstruction of the LV outflow tract could be displayed in 3 dimensions in all patients, allowing orientation and clear definition of the irregular geometry. In patients with HC, the minimal LV outflow tract cross-sectional area was smaller than in normal subjects (2.3 +/- 1.0 vs 5.0 +/- 0.9 cm(2), p < 0.0001). The ratio between maximal and minimal cross-sectional areas was higher in patients with HC than in normal subjects (2.6 +/- 0.9 vs 1.4 +/- 0.2, p <0.0001). The ratio between maximal and minimal diameter of the smallest cross section of the LV outflow tract was also significantly higher in patients with HC than in normal subjects (1.6 +/- 0.3 vs, 1.2 +/- 0. 1, p <0.001); a value of 1.36 separated normal subjects from HC patients without previous myectomy. In conclusion, precordial 3-dimensional echocardiography allows detailed qualitative and quantitative information on the LV outflow tract. Patients with HC are characterized by a highly eccentric and asymmetric shape of the LV outflow tract, and by a smaller minimal cross-sectional area than that seen in normal subjects. |
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Authors:
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A Salustri; M J Kofflard; J R Roelandt; Y Nosir; G Trocino; D Keane; W B Vletter; F J Cate |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The American journal of cardiology Volume: 78 ISSN: 0002-9149 ISO Abbreviation: Am. J. Cardiol. Publication Date: 1996 Aug |
Date Detail:
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Created Date: 1996-10-01 Completed Date: 1996-10-01 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0207277 Medline TA: Am J Cardiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 462-8 Citation Subset: AIM; IM |
Affiliation:
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Department of Cardiology, Thoraxcenter, University Hospital, Rotterdam-Dijkzigt. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Cardiac Output* Cardiomyopathy, Hypertrophic / physiopathology, surgery, ultrasonography* Echocardiography / methods* Electrocardiography Female Follow-Up Studies Heart Septum / surgery Humans Image Enhancement / methods* Image Processing, Computer-Assisted Male Middle Aged Mitral Valve / physiopathology, ultrasonography Prospective Studies Reproducibility of Results Systole Ventricular Function, Left* Ventricular Outflow Obstruction / physiopathology, surgery, ultrasonography |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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