Fig. 2 | npj Digital Medicine

Fig. 2

From: The use of photoplethysmography for assessing hypertension

Fig. 2

Difference between pulse arrival time (PAT) and pulse transit time (PTT). The PAT is defined as the time taken from the pulse waveform to traverse from the heart to a distal site. The PTT is defined as the period from relatively proximal site (e.g., arm) to a distal site (e.g., finger) or between two distal sites (e.g., figure and toe)

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