Central to peripheral arterial pressure gradients after cardiopulmonary bypass

Arterial pressure gradients following cardiopulmonary bypass.
(A) Femoral and radial arterial pressure tracings recorded two minutes after bypass (2 minutes post-bypass), when radial arterial pressure underestimates the more centrally measured femoral arterial pressure and 30 minutes later (30 minutes post-bypass), when radial and femoral arterial pressures have equalized and radial pressure has resumed a more typical morphology. Note that dicrotic notch (arrows) is visible in the femoral pressure tracing immediately after bypass, but is delayed in the radial pressure tracing.
(B) Femoral and radial arterial pressure tracings recorded before cardiopulmonary bypass (pre-bypass), two minutes following bypass (2 minutes post-bypass), and 30 minutes following bypass (30 minutes post-bypass). Note changing relationship between femoral and radial arterial pressure measurements at these different times.

Reproduced from: Schroeder R, Barbeito A, Bar-Yosef S, Mark JB. Cardiovascular monitoring. In: Miller's Anesthesia, 8th ed, Miller RD, Eriksson LI, Fleisher LA, et al (Eds), Saunders 2014. p.1345. Illustration used with the permission of Elsevier Inc. All rights reserved.

Graphic 111035 Version 1.0

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Central to peripheral arterial pressure gradients after cardiopulmonary bypass