cardiogenic mixing was studied in seven anaesthetized closed-chest dogs undergoing mechanical ventilation by comparing single-breath washout of two poorly soluble inert gases of widely differing diffusivities ( helium ( he ) and sulphur hexafluoride ( sf6 ) ) in normal conditions with the heart beating ( control ) , and during reversible temporary myocardial arrest ( heart arrest ) .
C0017112
inert gases
C0018880
helium