Experimental Study on the Evaluation of the Right Ventricular Function Using a Modified Swan-Ganz Catheter.
10.4326/jjcvs.21.126
- VernacularTitle:Ｍｏｄｉｆｉｅｄ Ｓｗａｎ‐Ｇａｎｚ Ｃａｔｈｅｔｅｒを用いた右心機能評価に関する実験的研究
- Author:
Yuichi ONO
;
Atsushi NARITA
;
Koji NAGAO
;
Kou TAKEUCHI
;
Satoshi IWABUCHI
;
Kuniaki SHUTO
;
Kozo FUKUI
;
Koichi KOYAMA
;
Sohei SUZUKI
;
HISAAKI KOIE
- Publication Type:Journal Article
- Keywords:
modified Swan-Ganz catheter;
peak RVP/RVESVI;
Emax
- From:Japanese Journal of Cardiovascular Surgery
1992;21(2):126-132
- CountryJapan
- Language:Japanese
-
Abstract:
We tried to evaluate the right ventricular function using a modified Swan-Ganz catheter with a rapid responsive thermistor. Twenty-four dogs comprised this series. Twelve were the model of left heart failure (Group A), and the other twelve were the model of right heart failure (Group B) produced by multiple ligation of coronary arteries. Dogs were studied for some of the circulatory indices before and after ligation with left atrial pressure at 10, 15 and 20mmHg in group A, and right atrial pressure at 10, 15 and 20mmHg in group B by volume loading. In group A, when the left atrial pressure was kept constant, right ventricular ejection fraction (RVEF) and right ventricular stroke work index (RVSWI) were decreased significantly after the ligation of coronary arteries. But there was no significant change in the peak right ventricular pressure-right ventricular endsystolic volume index ratio (peak RVP/RVESVI) associated with ligation. In group B, significant changes were observed in RVEF, RVSWI and peak RVP/RVESVI. Thus, it was found that right ventricular contractility in selective left heart failure was not reduced. Emax was considered to be a valuable index of ventricular contractility not affected by preload and afterload of ventricle, but this index is not easily measured clinically. The index peak RVP/RVESVI which is nearly equivalent to Emax, has an advantage in that it can be determined by the thermodilution method widely used in general. We conclude that this index is very useful to us for post-operative care in cardiac surgery.
