Linked Life Data

6497817

Source:http://linkedlifedata.com/resource/pubmed/id/6497817

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
10
pubmed:dateCreated
1984-12-10
pubmed:abstractText
A recent publication noted that women and men differ in transthoracic impedance (Zo), with women having higher levels, and this might cause underestimation of stroke volume index (SVI) in women when impedance cardiograph (IC) techniques are employed, as Zo is a squared factor in the denominator of the calculation equation. This paper confirmed the observed sex differences in Zo, with women (n = 19) having significantly (p less than 0.0001) higher Zo than men (n = 19) in both seated and supine positions. However, women also had higher dZ/dt (first derivative of impedance signal over time) levels when seated (women: 2.48 +/- 0.58; men: 1.38 +/- 0.35; p less than 0.0001) and when supine (women: 2.62 +/- 0.56; men: 1.58 +/- 0.34; p less than 0.0001). dZ/dt is a factor in the numerator, and, therefore, calculated SVI did not differ across sexes in either position. It was speculated that the Zo difference is due to differences in fat levels. Controlling for percent body fat and subscapula skin-fold differences did not entirely eliminate the sex differences in Zo. However, a group of well-trained females tested later (n = 10) showed lower Zo levels (24.8 vs. 28.2) when compared to the original group of 19 women who were not well-trained. Differences may be due to fat/muscle ratio of the thorax.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0095-6562
pubmed:author
pubmed:issnType
Print
pubmed:volume
55
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
893-5
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1984
pubmed:articleTitle
Sex differences in transthoracic impedance: evaluation of effects on calculated stroke volume index.
pubmed:publicationType
Journal Article, Comparative Study