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  2. Pulsatile flow - Wikipedia

    en.wikipedia.org/wiki/Pulsatile_flow

    The flow profiles was first derived by John R. Womersley (1907–1958) in his work with blood flow in arteries. [1] The cardiovascular system of chordate animals is a very good example where pulsatile flow is found, but pulsatile flow is also observed in engines and hydraulic systems, as a result of rotating mechanisms pumping the fluid.

  3. Womersley number - Wikipedia

    en.wikipedia.org/wiki/Womersley_number

    It is a dimensionless expression of the pulsatile flow frequency in relation to viscous effects. It is named after John R. Womersley (1907–1958) for his work with blood flow in arteries. [1] The Womersley number is important in keeping dynamic similarity when scaling an experiment. An example of this is scaling up the vascular system for ...

  4. Hemodynamics - Wikipedia

    en.wikipedia.org/wiki/Hemodynamics

    The pumping action of the heart generates pulsatile blood flow, which is conducted into the arteries, across the micro-circulation and eventually, back via the venous system to the heart. During each heartbeat, systemic arterial blood pressure varies between a maximum ( systolic ) and a minimum ( diastolic ) pressure. [ 33 ]

  5. Vascular remodelling in the embryo - Wikipedia

    en.wikipedia.org/wiki/Vascular_remodelling_in...

    The primitive heart within the first few days of contraction is best described as a peristaltic pump, however after three days the flow becomes pulsatile. [9] Pulsatile flow plays an important role in vascular remodelling, as flow patterns can affect the mechanotransduction of stress to endothelial cells. [7] [13]

  6. Ventricular assist device - Wikipedia

    en.wikipedia.org/wiki/Ventricular_assist_device

    [13] [14] [15] In some pulsatile pumps (that use compressed air as an energy source [16]), the volume occupied by blood varies during the pumping cycle. If the pump is contained inside the body then a vent tube to the outside air is required. Continuous-flow VADs are smaller and have proven to be more durable than pulsatile VADs. [17]

  7. Thoratec - Wikipedia

    en.wikipedia.org/wiki/Thoratec

    With the 2001 Thermo Cardiosystems merger, Thoratec acquired the HeartMate Left Ventricular Assist System, an implanted VAD for end-stage heart patients. A landmark three-year study of 129 patients at 22 major medical centers, called REMATCH (Randomized Evaluation of Mechanical Assistance for the Treatment of Congestive Heart Failure) and published in November 2001, found that the HeartMate VE ...

  8. File:Comparison of velocity profile of Womersley flow.svg

    en.wikipedia.org/wiki/File:Comparison_of...

    English: Scaled velocity profiles of pulsatile flow are compared according to Womersley number. Date: 9 January 2017: ... Pulsatile flow; Metadata.

  9. Korotkoff sounds - Wikipedia

    en.wikipedia.org/wiki/Korotkoff_sounds

    As the heart beats, these pulses are transmitted smoothly via laminar (non-turbulent) blood flow throughout the arteries, and no sound is produced. Similarly, if the cuff of a sphygmomanometer is placed around a patient's upper arm and inflated to a pressure above the patient's systolic blood pressure , there will be no sound audible.