Dynamics of Arterial Flow by Stewart Wolf, Nicholas T. Werthessen (auth.), Stewart Wolf,

By Stewart Wolf, Nicholas T. Werthessen (auth.), Stewart Wolf, Nicholas T. Werthessen (eds.)

This quantity comprises the edited transcript of the second one Topical Colloquium in keeping with leads built on the unique convention at the artery and the method of arteriosclerosis (the Lindau convention of 1970). the 1st follow-up colloquium on "The tender Muscle of the Artery" was once held in Heidelberg in 1973. making plans for the current one used to be undertaken by means of the editors with Dr. C. Forbes Dewey, division of Mechanical Engineering, Massachusetts Institute of expertise, Cambridge, Massachusetts. The assembly itself used to be held June, 1976 on the Delaware Water hole, Pennsy1vani~, lower than the joint sponsorship of Totts hole Institute and the Massachusetts Institute of know-how with monetary help from the yank center organization, the workplace of Naval study, and the Smith, Kline and French corporation. the target of the sequence of conferences, starting at Lindau has been to check from an interdisciplinary and foreign standpoint the elemental physiologic and pathophysiologic methods pertinent to the advance of arteriosclerosis. This colloquium sought to envision seriously the proof pertaining to hemodynamic forces to atherogenesis, to reconcile disparate findings and interpretations in as far as attainable; and to make a synthesis of the current country of data of the dynamics of arterial circulate. thankful acknowledgement is made for the precious counsel of Joan Martin and Helen Goodell within the whole editorial technique. The editors recognize with thank you the secretarial information of Moira Martin, Colleen Nagle, Cindy Carter and Pat Ide. detailed thank you are due pleasure Lowe who accomplished the whole ultimate manuscript.

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22-26) (Fig. 1-5). Later, Vaishnav, Young, and Patel studied the nonlinear viscoelastic properties of the aorta (27). Many of these studies are summarized by Patel and Vaishnav in review articles (28,29). DR. KENYON: That takes us through three fairly conventional engineering descriptions of blood vessel rheology. I think the next important point to Retraction of Cut Vessel make about blood vessels is that they do appear to be under a state of pre-stress and this is a fairly common 38 CHAPTER 1 observation of the physician, or the physiologist, that when he snips a vessel it contracts.

ANATOMICAL AND PHYSIOLOGICAL CHARACTERISTICS 49 With regard to Arndt's work, he used two types of measurements, one using an ultrasonic transducer on the carotid artery which he subsequently used on the aorta, and for some other measurements he used radiographs. He measured wall diameter from radiographs at different pressures and used these data to define values of strain. To some extent there are methodological reasons for the differences in wall strain which he reported to an extent in comparing Arndt's data with other data in the literature especially data on the thoracic aorta, the effects of thoracotomy, of surgery in general, of trauma, all contribute to a determination of the value of radial wall strain both directly and indirectly.

2 Anistropy of canine aorta (Patel, 1973). ~- Fig. , ~ Wri-W---. 5 e---·. ---. , , 0 . ' 1II. 10_ • 'OW " .. A. OIOtlU' I •• 010111". • • 0 1011... IN VIVO DATA I I() DOGS I -~ . -- -----e,~_-; :-'1a"" 05 . 0 er 2 • • :lJ -i m -0 }> o I 0- W ANATOMICAL AND PHYSIOLOGICAL CHARACTERISTICS 37 DR. KENYON: Yes, apparently it seems not to be consistent between those two. If you want to characterize, and I think it is a valid thing for one to do, the anisotropic properties of the vessels, you have to be very careful which one you are talking about and how you perform your tests.

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