Pulse transit time as an index of vascular reactivity.

Pulse transit time (PTT) is a non-invasive method for measuring arterial compliance and stiffness, which are excellent predictors of cardiovascular disease. This study aims to determine whether PTT can be used to precisely monitor vascular reactivity in response to changes in hand posture and whether the digital pulse wave index of time-to-maximum slope (TMS) is a suitable alternative to PTT. Fifteen healthy, 22-year-old males participated in the study.