Initial experience with a thin single segment pressure and conductance catheter for measurement of left ventricular volume

QC 20100922
Aims: To evaluate a thin and soft multifunctionalcatheter for the simultaneous real time monitoring of leftventricular volume and pressure with special consideration toside elTects such as interference with normal cardiacelectrophysiology.Methods and results: In four pigs, pressure and volumewere simultaneously recorded by using the thin single segmentpressure and conductance catheter. Measurements were doneunder varied cardiac conditions: at baseline, during preloadreduction and afterload Increase. Volumes were calibrated withintracardiac ultrasound measurements. During preloadreduction the pressure and volume decreased as expected. Acautious afterload increase resulted in a corresponding pressureand volume increase, the maximum of the pressure curvechanged from early to late. Both SV and EDV increased. Thevery few arrhythmias were mainly caused by surgicalinterference.Conclusion: The present study demonstrates that our thinsingle segment conductance catheter for the simultaneousmeasurement of LV volume and pressure has a performancethat warrants further development with the goal to make themethod available for human use. In particular, the catheter didnot cause any arrhythmias.

Ingår i:Annual Reports of the Research Reactor Institute, Kyoto University, s. 103-106

Av författaren/redakt...: Carlsson, Camill ...; Söderqvist, Emil; Brodin, Lars-Åke; Källner, Göran; Hultman, Jan; Elmqvist, Håkan; visa fler...; Saha, Samir; visa färre...

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