Korean J Anesthesiol.  2007 Aug;53(2):206-211. 10.4097/kjae.2007.53.2.206.

Does Predictors of Preload Measured from Continuous Right Ventricular End-diastolic Volume Index Monitored Pulmonary Artery Catheter Reflect Stroke Volume Index in Off Pump Coronary Artery Bypass?

• Kwak YL
• Won YJ
• Lee JH
• Shim JK
• Bang SO
• Lee JY

• KMID: 2243374
• DOI: http://doi.org/10.4097/kjae.2007.53.2.206

Abstract

BACKGROUND: It is important to assess cardiac preload for management of patients undergoing off pump coronary artery bypass surgery (OPCAB). Recently, several studies have documented the good correlation between right ventricular end-diastolic volume index (RVEDVI) and stroke volume index (SVI), compared with cardiac filling pressures. However, none of these studies have evaluated relationship between predictors of preload and SVI measured with volumetric pulmonary artery catheter during OPCAB. The correlation of continuous RVEDVI and SVI measured with volumetric pulmonary artery catheter during OPCAB was evaluated in this study.
METHODS
Fifty three patients undergoing OPCAB were included. Hemodynamic parameters were measured 10 min after induction (T1), 10 min after Y-graft formation started (T2) and 10 min after sternum closure (T3). The correlation of parameters were assessed by simple linear regression.
RESULTS
Central venous pressure (CVP) and pulmonary artery occlusion pressure (PAOP) did not correlate with SVI during OPCAB. On the other hand, a statistically significant result was found between RVEDVI and SVI at T2 (r(2)=0.133, P=0.007) and T3 (r(2)=0.380, P < 0.000). But RVEDVI and SVI were weakly correlated. And at T1, RVEDVI and SVI did not correlate.
CONCLUSIONS
RVEDVI is a more reliable predictor of preload compared to CVP and PAOP during OPCAB. But in post-induction period (T2), RVEDVI did not correlate with SVI.

Keyword

off-pump coronary artery bypass surgery; right ventricular end-diastolic volume index; stroke volume index; volumetric pulmonary artery catheter

MeSH Terms

Catheters*
Central Venous Pressure
Coronary Artery Bypass, Off-Pump*
Hand
Hemodynamics
Humans
Linear Models
Pulmonary Artery*
Sternum
Stroke Volume*
Stroke*