PHYSIOLOGY
CARDIOVASCULAR PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The beating of the heart creates ____ flow in which the flow speed varies dramatically over the ratio of a single heart beat.
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episodic
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pulsatile
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steady
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constant
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Explanation:
Detailed explanation-1: -The lumped parameter model of the intact pulsatile heart and circulation is illustrated in Figure 1 in terms of its electrical circuit analog. Here, charge is analogous to blood volume (, ml), current, to blood flow rate (, ml/s), and voltage, to pressure (, mmHg).
Detailed explanation-2: -When compared to a pulsatile device, a nonpulsatile TAH or VAD needs to produce increased flow and higher mean intravascular pressures to maintain normal organ function. Despite its maintaining normal organ function, nonpulsatile flow does cause alterations in biochemical functions and organ specific blood flow.
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