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Figure 7 | Cardiovascular Ultrasound

Figure 7

From: A new technique for assessing arterial pressure wave forms and central pressure with tissue Doppler

Figure 7

Limitations – discordance. Two examples of discordance in the comparison of central pressure obtained by tonometry and TDI. (A) Shows a patient in which the TDI velocities were aliased resulting in a gross underestimation of maximum (systolic) pressure. (B) Shows a patient with excessive movement of the carotid artery during acquisition of the TDI images resulting in artifact in the displacement waveform.

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