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Ákvörðun flatarmáls ósæðarlokuþrengsla með Doppler hjartaómun

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Authors
Ragnar Danielsen
Issue Date
1990-05-15

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Citation
Læknablaðið 1990, 76(5):259-63
Abstract
Doppler echocardiographic (DE) assessment of the aortic valve area (AVA) by the continuity equation was done prior to cardiac catheterization in 85 patients with suspected aortic stenosis. DE determined AVA correlated closely with AVA calculated by Gorlin's equation at catheterization (r=0.96). However, DE systematically underestimated AVA (p<0.001), most markedly in patients with mild stenosis (>1.2 cm2). This drawback, however, can usually be overcome by taking the patients' symptoms into account. In addition, in lack of a »gold standard« this AVA underestimation need not imply errors of the DE method, but may also reflect known inaccuracies of the catheterization technique. Therefore, overall DE can assess the AVA reliably.
Doppler og tvívíddar hjartaómun var beitt hjá 85 sjúklingum er grunaðir voru um ósæðarlokuþrengsli til að ákvarða flatarmál lokuþrengslanna með notkun svokallaðrar samfellulíkingar. Árangur var borinn saman við niðurstöður er fengust með líkingu Gorlins við hjartaþræðingu. Góð fylgni fannst milli þessara tveggja aðferða (r=0.96), en Doppler hjartaómun vanmat lítillega og kerfisbundið flatarmál ósæðarlokuþrengsla, einkum hjá sjúklingum með væg þrengsli (>1.2 cm2). Þegar höfð er hliðsjón af klínískum einkennum sjúklinga hefur þessi munur þó ekki marktæka þýðingu. Ennfremur þarf hinn óverulegi munur milli aðferðanna ekki endilega að stafa af ónákvæmni við Doppler hjartaómun, heldur allt eins af þekktum skekkjuþáttum í hjartaþræðingartækni. Í heildina er Doppler hjartaómun því fullt eins góð aðferð og hjartaþræðing til að ákvarða flatarmál þrengdrar ósæðarloku.
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Icelandic Journal Articles (Peer Reviewed)

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