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How accurate is visual assessment of synchronicity in myocardial motion? An in vitro study with computer-simulated regional delay in myocardial motion : clinical implications for rest and stress echocardiography studies
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- Escobar Kvitting, John-Peder, 1976- (author)
- Linköpings universitet,Klinisk fysiologi,Hälsouniversitetet
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- Wigström, Lars, 1967- (author)
- Linköpings universitet,Klinisk fysiologi,Hälsouniversitetet
- Strotmann, Jörg M. (author)
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- Sutherland, George (author)
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- (creator_code:org_t)
- 1999
- 1999
- English.
- In: Journal of the American Society of Echocardiography. - 0894-7317 .- 1097-6795. ; 12:9, s. 698-705
- Journal article (peer-reviewed)
Abstract
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- Asynchronicity in echocardiographic images is normally assessed visually. No prior quantitative studies have determined the limitations of this approach. To quantify visual recognition of myocardial asynchronicity in echocardiographic images, computer-simulated delay phantom loops were generated from a 3.3 MHz digital image data from a normal left ventricular short-axis heart cycle acquired at 55 frames per second. Six expert observers visually assessed 30 abnormal and 3 normal loops with differing computer-induced delay patterns on 3 occasions and in this optimally simulated environment could recognize only single delays of 89 ms or more. This was improved to 71 ms or more by use of side-by-side (normal versus abnormal) comparative review. Thus visual assessment of clinically important regional delay in rest or stress echo images is limited.
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- MEDICIN
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- art (subject category)
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