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European Heart Journal 1995 16(10):1425-1429;
Copyright © 1995 by the European Society of Cardiology.
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© 1995 The European Society of Cardiology

The determination of volume of right ventricular casts using a conductance catheter

P. A. WHITE, A. J. BISHOP, B. CONROY*, P. J. OLDERSHAW and A. N. REDINGTON

Royal Brompton Hospital London
*Maxillo-Facial Laboratory, Queen Mary's University Hospital London

revised 7 November 1994; accepted 21 December 1994.

Correspondence: Dr A. N. Redington, Department of Paediatric Cardiology, Royal Brompton Hospital, Sydney Street, London SW3 6NP.

Abstract

Conductance catheters were used to assess the volume of right ventricular models made from post-mortem casts. Models were made from silastic rubber and filled with saline. The correlation between volume assessed by conductance catheter and real volume was investigated as saline was withdrawn from, and injected into, five models. The mean regression between real and conductance-derived volume was 1.05 (SE 0.04 mean R2 0.94 SE 0.02) with Y-intercept –{theta} 0.25 ml SE 1.72. Parallel wall conductance was assessed through the tricuspid orifice sealed with human tricuspid tissue, or left open, and found to be negligible. There was no difference between volumes measured by a catheter through either the pulmonary or tricuspid orifice. We conclude that conductance catheters are suitable for the assessment of right ventricular volume, despite the complex geometry.

Key Words: Conductance catheter • right ventricle


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