Abstract:

Objective To compare the results of CCO measurements by echocardiography through transesophageal Doppler route with that of Swan-Ganz catheterization method in anesthetized dog models.Methods Cardiogenic shock model of canine was established by ligating the left anterior descending(LAD) of coronary artery.The transesophageal Doppler sensor was placed into the esophagus at the level of T5-6 vertebra of in 18 anesthetized dogs.The hemodynamic parameters,including CCO were recorded with HemosonicTm100;The Swan-Ganz Catheterization performed through right femoral vein.The CCO variables of both group were analyzed with linear regression procedure.Results Continuous cardiac output measured with transesophageal Doppler echocardiography was highly correlated with that measured with thermodilution technique(R=0.965,P<0.01,n=108).Conclusion Transesophageal Doppler echocardiography allows reliable continuous measurements of CCO,both easily and safely.The invasive technique of hemodynamic measurement can be replaced by non-invasive one.

Key words: cardiac output, Swan-Ganz, transesophageal Doppler Echocardiography