Figure 8
From: A new technique for assessing arterial pressure wave forms and central pressure with tissue Doppler
Limitations – artifacts. Artifacts with carotid tissue Doppler caused by technical issues: A – artifact from breathing which caused the artery to move in and out of the image plane; B – Excessive noise in the lumen which the analysis program picked up as tissue; C – Reverberation causing inaccurate detection of the vessel wall; D – Excessive movement of the artery during the cardiac cycle; E – Reverberation causing inaccurate detection of the vessel wall; F – Very little movement detected in the artery at peak pulse pressure and flow resulting in poor quality waveforms.