Thermodilution curves showing mean transit time (MTt) and downslope decay time (DSt) of the slope. The time point (A) represents the time of injection. The product of cardiac output and MTt equals the intrathoracic thermal volume. Multiplication of the cardiac output and the DSt equals the pulmonary thermal volume (PTV). The global end diastolic volume (GEDV) is equal to the ITTV − PTV. The intrathoracic blood volume = . The extravascular lung water (EVLW) is equal to the ITTV less the ITBV.
