Head-up tilt

1. Head-up tilt increases observed-vs.-predicted PWV change difference in humans (R2 for quadratic trend = 0.38, P < 0.01).

   “the difference in observed-vs.-predicted PWV change increased nonlinearly as a function of age (R2 for quadratic trend = 0.38, P < 0.01, P vs. linear = 0.04).”

   Human trialhead-up tiltn = 30

   Age-Specific Acute Changes in Carotid-Femoral Pulse Wave Velocity With Head-up Tilt

   American journal of hypertension·31 Dec 2020

More on Observed-vs.-predicted PWV change difference

1. Head-up tilt increases heart rate in humans (P < 0.01).

   “a positive trend was also observed for heart rate (HR; P < 0.01).”

   Human trialhead-up tiltn = 30

   Age-Specific Acute Changes in Carotid-Femoral Pulse Wave Velocity With Head-up Tilt

   American journal of hypertension·31 Dec 2020

More on Heart rate

1. Head-up tilt increases carotid-femoral pulse wave velocity in humans (8.0 ± 2.0 m/s supine, 9.1 ± 2.6 m/s at 30°, 9.5 ± 3.2 m/s at 60°, P < 0.01).

   “cfPWV significantly increased upon body tilting (8.0 ± 2.0 m/s supine, 9.1 ± 2.6 m/s at 30°, 9.5 ± 3.2 m/s at 60°, P for trend <0.01)”

   Human trialhead-up tilt of 0°, 30°, and 60°n = 30

   Age-Specific Acute Changes in Carotid-Femoral Pulse Wave Velocity With Head-up Tilt

   American journal of hypertension·31 Dec 2020

More on Carotid-femoral pulse wave velocity