| Comparison of tissue Doppler velocities obtained by different types of echocardiography systems: are they compatible? | |
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MedLine Citation:
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PMID: 20486956 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Both systolic and diastolic tissue Doppler (TD) velocities have an important diagnostic and prognostic role in cardiology. We aimed to compare TD velocities between two different echocardiography systems. Patients: Thirty-one consecutive patients (mean age: 65.2 +/- 17.5 years; 12 males) were enrolled. METHODS: Systolic (Sa), early (Ea), and late (Aa) diastolic velocities were measured by TD at the lateral mitral annulus by a Sonos 2000 (Hewlett-Packard, Andover, MA, USA) and a Philips iE33 system. The E/Ea ratio was calculated. RESULTS: Ea, Aa, and Sa velocities were higher when measured by the Sonos system (Ea: 13.2 +/- 4.1 cm/s vs. 8.3 +/- 3.6 cm/s; Aa: 14.8 +/- 3.8 cm/s vs. 9.3 +/- 2.3 cm/s; Sa: 15.2 +/- 3.6 cm/s vs. 8.4 +/- 2.0 cm/s; P < 0.0001 all). A significant correlation was found in Ea and in Ea/Aa (r = 0.84 and r = 0.85 resp; P < 0.0001 for both), and a weaker in Aa (r = 0.43; P = 0.02) between the machines. The Bland-Altman analysis showed broad limits of agreement between the measurements for Ea, Aa, and Sa (mean difference: 4.95 cm/s; 5.52 cm/s; 6.73 cm/s, respectively; limits: 0.64-9.25 cm/s; -1.39-12.39 cm/s; -0.37-13.83 cm/s, respectively). An E/Ea ratio >5.6 by the Sonos system showed 75% sensitivity and 79% specificity for elevated left ventricular filling pressure, defined as E/Ea >10 by the reference Philips system. CONCLUSIONS: Although diastolic TD velocities had excellent correlations between the two machines, there was a systematic overestimation by the Sonos system. Since the limits of agreement do not allow replacing the measurements, we suggest using the same echocardiographic equipment at patient follow-up. |
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Authors:
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Mónika Dénes; Katalin Farkas; Tamás Erdei; Mária Lengyel |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Echocardiography (Mount Kisco, N.Y.) Volume: 27 ISSN: 1540-8175 ISO Abbreviation: Echocardiography Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-05-21 Completed Date: 2010-09-20 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8511187 Medline TA: Echocardiography Country: United States |
Other Details:
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Languages: eng Pagination: 230-5 Citation Subset: IM |
Affiliation:
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Gottsegen György Hungarian Institute of Cardiology, H-1096 Budapest, Hungary. denesmoni@gmail.com |
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Aged, 80 and over Blood Flow Velocity Echocardiography, Doppler / instrumentation*, methods* Female Humans Male Middle Aged ROC Curve |
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