Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1997-6-25
pubmed:abstractText
This study examines the use of conductance catheters to assess human right ventricular volume. Ten patients undergoing diagnostic cardiac catheterisation underwent right heart catheterisation with a conductance catheter and micromanometer, and a thermodilution catheter before and after fluid loading. Parallel wall conductance (Vc), and the multiplication factor relating conductance and thermodilution derived stroke volumes (å) were derived at each steady state. Pressure-volume cycles were analyzed at steady state and during fluid loading. Fluid loading resulted in a significant increase in cardiac output, and change in maximum and minimum cycle volume. There was no significant change in å (mean 0.40 S.D. 0.20) or Vc (mean 126.4 S.D. 59.6 ml) at higher cardiac outputs or ventricular volumes. Right ventricular pressure-volume cycles were formed demonstrating characteristic lack of clear isovolumic contraction and relaxation phases, and low cycle efficiencies (mean 0.62 S.D. 0.16). Serial cycles recorded during volume loading defined an end systolic pressure-volume relation more reliably than a stroke work end diastolic volume relation. Thus, a conductance derived volume signal can be obtained in the human right ventricle which can be interpreted as a continuous and instantaneous index of right ventricular volume, allowing the construction of real time pressure-volume cycles.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0167-5273
pubmed:author
pubmed:issnType
Print
pubmed:volume
58
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
211-21
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed-meshheading:9076547-Adult, pubmed-meshheading:9076547-Aged, pubmed-meshheading:9076547-Blood Pressure, pubmed-meshheading:9076547-Cardiac Output, pubmed-meshheading:9076547-Cardiac Volume, pubmed-meshheading:9076547-Cardiomyopathy, Dilated, pubmed-meshheading:9076547-Computer Graphics, pubmed-meshheading:9076547-Coronary Disease, pubmed-meshheading:9076547-Electrocardiography, pubmed-meshheading:9076547-Female, pubmed-meshheading:9076547-Heart Catheterization, pubmed-meshheading:9076547-Hemodynamics, pubmed-meshheading:9076547-Humans, pubmed-meshheading:9076547-Male, pubmed-meshheading:9076547-Manometry, pubmed-meshheading:9076547-Middle Aged, pubmed-meshheading:9076547-Myocardial Infarction, pubmed-meshheading:9076547-Pulmonary Emphysema, pubmed-meshheading:9076547-Respiratory Insufficiency, pubmed-meshheading:9076547-Respiratory Muscles, pubmed-meshheading:9076547-Signal Processing, Computer-Assisted, pubmed-meshheading:9076547-Stroke Volume, pubmed-meshheading:9076547-Thermodilution, pubmed-meshheading:9076547-Ventricular Dysfunction, Right, pubmed-meshheading:9076547-Ventricular Function, Right
pubmed:year
1997
pubmed:articleTitle
Clinical application of the conductance catheter technique in the adult human right ventricle.
pubmed:affiliation
Department of Cardiology, Royal Brompton Hospital, London, UK.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't