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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1989-4-19
pubmed:abstractText
To determine whether the ECG would be useful in the prediction of impaired left ventricular ejection performance in aortic valve stenosis, the authors evaluated 121 patients according to (1) the time relationship of the R peak in V6 to the S peak in V2; and (2) the negative P wave terminal force in V1 (Morris index, n = 109). Left ventricular ejection fraction (LVEF) was significantly depressed in patients with the R peak in V6 later than the S peak in V2 (R peak delay in V6, n = 24), compared with those with the R peak in V6 preceding the S peak in V2 or with both peaks occurring simultaneously (n = 97) (LVEF 40.8 +/- 11.8% vs 69.9 +/- 13.3%, p = .000). LVEF less than 55% was present in 87.5% of patients with the R peak delay in V6 and in only 23.7% of those without this finding. The Morris Index was significantly greater in patients with LVEF less than 55% (n = 39) than in those with LVEF greater than or equal to 55% (n = 70) (Morris Index 0.063 +/- 0.035 msec vs 0.030 +/- 0.025 msec, p = .000). The R peak delay in V6 is a highly specific (96.1%), but less sensitive (47.7%), indicator of depressed LVEF, its positive predictive value and predictive accuracy being 87.5% and 78.5%, respectively.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0022-0736
pubmed:author
pubmed:issnType
Print
pubmed:volume
22
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
45-52
pubmed:dateRevised
2009-11-11
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
Electrocardiographic markers of impaired left ventricular ejection performance in aortic stenosis.
pubmed:affiliation
University Heart Centre, Erlangen, Federal Republic of Germany.
pubmed:publicationType
Journal Article