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Article: Right ventricular volume measurement using the conductance catheter method: Validation in excised porcine hearts

TitleRight ventricular volume measurement using the conductance catheter method: Validation in excised porcine hearts
Authors
Issue Date2002
Citation
ASAIO Journal, 2002, v. 48 n. 5, p. 514-519 How to Cite?
AbstractThe conductance catheter method for measuring right ventricular (RV) volume changes was assessed in seven excised porcine hearts. A 5-FG conductance catheter was placed within a latex balloon and positioned in the RV cavity of seven freshly excised porcine hearts. Conductance was recorded while saline was withdrawn from the intraventricular balloon in 2 mi decrements. Linear regression analysis of measured conductance versus reference volumes was computed. The effect of left ventricular (LV) filling and catheter length on conductance derived RV volume was also determined. Conductance derived volumes were highly correlated with reference volumes [R 2 0.976, standard deviation (SD) 0.035]. The mean gradient of regression was 0.97 (SD 0.10), and it was not significantly affected by LV volume alterations. However, when we analyzed LV filling, a small but significant increase in the y-intercept was observed (LV empty 3.11 ml, SD 1.71; LV full 4.58, SD 2.39; p = 0.008). Introduction of the catheter through either the tricuspid or pulmonary orifices were both effective in ventricular volume measurement. The effect of mismatch between the catheter length and the RV long axis dimension was evaluated by changing the position of the active sensing electrodes along the catheter body. Conductance measurements, obtained from catheters shorter than the long axis of the RV, still maintained a highly linear correlation with real volume, but regression gradients were significantly reduced (long 0.975, SD 0.087; medium 0.787, SD 0.094; small 0.589, SD 0.091; p < 0.001). These results show that a conductance catheter of appropriate length can accurately measure RV volume, despite the complex shape and geometric changes associated with ventricular filling.
Persistent Identifierhttp://hdl.handle.net/10722/192658
ISSN
2015 Impact Factor: 2.291
2015 SCImago Journal Rankings: 0.836
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorDanton, MHDen_US
dc.contributor.authorByrne, JGen_US
dc.contributor.authorHsin, Men_US
dc.contributor.authorLaurence, Ren_US
dc.contributor.authorCohn, LHen_US
dc.contributor.authorAklog, Len_US
dc.date.accessioned2013-11-20T04:54:55Z-
dc.date.available2013-11-20T04:54:55Z-
dc.date.issued2002en_US
dc.identifier.citationASAIO Journal, 2002, v. 48 n. 5, p. 514-519en_US
dc.identifier.issn1058-2916en_US
dc.identifier.urihttp://hdl.handle.net/10722/192658-
dc.description.abstractThe conductance catheter method for measuring right ventricular (RV) volume changes was assessed in seven excised porcine hearts. A 5-FG conductance catheter was placed within a latex balloon and positioned in the RV cavity of seven freshly excised porcine hearts. Conductance was recorded while saline was withdrawn from the intraventricular balloon in 2 mi decrements. Linear regression analysis of measured conductance versus reference volumes was computed. The effect of left ventricular (LV) filling and catheter length on conductance derived RV volume was also determined. Conductance derived volumes were highly correlated with reference volumes [R 2 0.976, standard deviation (SD) 0.035]. The mean gradient of regression was 0.97 (SD 0.10), and it was not significantly affected by LV volume alterations. However, when we analyzed LV filling, a small but significant increase in the y-intercept was observed (LV empty 3.11 ml, SD 1.71; LV full 4.58, SD 2.39; p = 0.008). Introduction of the catheter through either the tricuspid or pulmonary orifices were both effective in ventricular volume measurement. The effect of mismatch between the catheter length and the RV long axis dimension was evaluated by changing the position of the active sensing electrodes along the catheter body. Conductance measurements, obtained from catheters shorter than the long axis of the RV, still maintained a highly linear correlation with real volume, but regression gradients were significantly reduced (long 0.975, SD 0.087; medium 0.787, SD 0.094; small 0.589, SD 0.091; p < 0.001). These results show that a conductance catheter of appropriate length can accurately measure RV volume, despite the complex shape and geometric changes associated with ventricular filling.en_US
dc.languageengen_US
dc.relation.ispartofASAIO Journalen_US
dc.titleRight ventricular volume measurement using the conductance catheter method: Validation in excised porcine heartsen_US
dc.typeArticleen_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1097/00002480-200209000-00013-
dc.identifier.pmid12296572-
dc.identifier.scopuseid_2-s2.0-0036737375en_US
dc.identifier.volume48en_US
dc.identifier.issue5en_US
dc.identifier.spage514en_US
dc.identifier.epage519en_US
dc.identifier.isiWOS:000178040500013-

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