title: Evaluation of continuous monitoring of stroke volume and cardiac output in patients supported by an intra-aortic balloon pump.
abstract: BACKGROUND
  Currently available minimally invasive devices cannot provide continuous determination of stroke volume (SV) or cardiac output (CO) in patients supported with an intra-aortic balloon pump (IABP). Our aim was to evaluate the accuracy of Dat-con™ monitor for continuous SV and CO determination in such patients.
  
  
  METHODS
  SV (SVdat-con) and CO (COdat-con) were determined by Dat-con™ monitor in 35 patients supported by IABP, at baseline and after 103 therapeutic interventions. Echocardiography was used to measure SV (SVecho) and CO (COecho) from velocity time integral and cross-sectional area of left ventricular outflow tract. Monitored and echocardiographic values were compared using Bland-Altman's statistics.
  
  
  RESULTS
  Bias in baseline SVdat-con compared to SVecho was 0.2 mL, with 1.96 limits of agreement (SD) of ±4.8 mL and with percentage error of 11%. Bias of baseline COdat-con compared to COecho was 0.03 l/min, with 1.96 SD of ±0.435 l/min with percentage error of 10.9%. After therapeutic interventions, bias of SVdat-con compared to SVecho was -0.3 mL, with 1.96 SD of ±4.8 mL and with percentage error of 10.5%. Agreement for SV changes was >95% (exclusion zone: changes <10%). Bias of COdat-con compared to COecho after therapeutic interventions was -0.03 L/min, with 1.96 SD of ±0.45 L/min.
  
  
  CONCLUSIONS
  The accuracy and trending of continuous determination of SV and CO with Dat-con™ monitor in patients supported by IABP is equivalent to echocardiography.
authors: Medical Faculty Ljubljana, University of Ljubljana, Ljubljana, Slovenia. matej.podbregar@guest.arnes.si
authors: M
authors: M
authors: Podbregar
authors: M
authors: M
authors: Košir
authors: D
authors: D
authors: Štajer
authors: J
authors: J
authors: Zdovc
authors: S
authors: S
authors: Plaskan
mesh_terms: D002302:Cardiac Output; D004452:Echocardiography; D004867:Equipment Design; D005260:Female; D006353:Heart-Assist Devices; D006801:Humans; D007423:Intra-Aortic Balloon Pumping / Q000295:instrumentation*; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D013318:Stroke Volume