... device with the second-generation software. This finding may help to explain the variableresults of studies comparing the FTV system with other cardiacoutput monitoring techniques, questions the ... femoral arterial line, the transducer was adjusted to the level of left atrium and the system was started according to the instructions of the manufacturer (including entering the requested demographical ... modifi-cation of the FTV-system software (the third generation)improves the reliability of this technology.Competing interests The authors SE, ZG, VD, IB, JS, HH, and KUB declare thatthey have...