Figure 3  .

Simplified peak power estimates compared with peak instantaneous power in dogs. Simplified peak power (SPP) estimates using peak flow measured with flow probe shows excellent correlation with true peak instantaneous power (A), with minor overestimation of higher levels of power shown on the Bland-Altman plot (B). When echocardiographic estimates of flow are used to estimate simplified peak power there is some increase in scatter but still a good correlation with true peak instantaneous power, using continuous wave (CW) Doppler (C and D) and pulse wave (PW) Doppler (E and F).