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Pulse wave velocity similar at physiologic pressures but higher in pulmonary arteries at equal pressures; leaves open translation to human hemodynamics.
PHYSIOLOGY AND EXPERIMENTAL PATHOLOGY Recent improvements in technic have made possible certain studies 1 on the dynamics of the pulmonary circulation in dogs under more nearly normal conditions than heretofore. It has been found that the velocity of the pulse wave in the pulmonary arteries is about the same as that in the aorta at the physiologic pressures existing in each. However, at comparable pressures the velocity is much greater in the pulmonary arteries than in the aorta, which suggests that in low pressure ranges the large pulmonary arteries are less easily distended than is the aorta. Variations in the pressure in the pulmonary arteries with respiration are in the same direction as the variations in the pressure in the systemic arteries, falling in inspiration and rising in expiration. The variations in the pulmonary arteries are probably the direct result of changes in intrathoracic pressure rather than the indirect result
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Ashton Graybiel (1938) studied this question.
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