1234 
MONITORING 
50mm/sec 
10 mm/sec 
25mm/sec 
2 mm/sec 
50 mm/sec 
Figure 2. — Typical waveforms of three different manufacturer's flowmeters. Probes' fit was good in all cases and 
three experiments were performed with all flowmeters used each time. (A) Note strong ECG signal. (B) The 
baseline is unstable and zero flow during diastole is not evident. (C) Accurate measurement or aortic flow. 
