Linked Life Data

7156955

Source:http://linkedlifedata.com/resource/pubmed/id/7156955

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
45
pubmed:dateCreated
1983-3-17
pubmed:abstractText
In 35 consecutive patients with aortic stenosis, noninvasive assessment of pressure gradients was performed using a continuous wave Doppler ultrasound technique prior to left heart catheterization. Maximum blood flow velocity in the ascending aorta and time from aortic valve opening to peak velocity in relation to left ventricular ejection time (TPV) were measured. Doppler data proved reliable in predicting a pressure gradient above or below 50 mm Hg (sensitivity 89% and specificity 88%). Pressure gradients calculated from the frequency shift of the ultrasound wave correlated well with pressure measurements obtained at cardiac catheterization in 31 patients with adequate Doppler velocity signals (r = 0.85, p less than 0.001). In all 4 patients with inadequate velocity signals a pressure gradient above 50 mm Hg could still be predicted by an abnormally delayed timing of peak velocity in systole (TPV greater than 0.5).
pubmed:language
ger
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0036-7672
pubmed:author
pubmed:issnType
Print
pubmed:day
6
pubmed:volume
112
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1597-600
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1982
pubmed:articleTitle
[Non-invasive evaluation of pressure gradients in aortic stenosis using Doppler ultrasound].
pubmed:publicationType
Journal Article, English Abstract