205 L13 Flashcards

Vascular haemodynamics

1
Q

What is the equation for blood flow?

A

Blood flow (Q) = change in pressure (P) / resistance (R)

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2
Q

Blood flow to tissues is controlled in relation to tissue ——.

A

needs

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3
Q

When talking about the whole body blood flow = —– —–

A

cardiac output

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4
Q

To increase blood flow increase the —— of the blood vessel, or ————.

A

To increase blood flow increase width of blood vessel, or vasoconstrict.

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5
Q

Blood flow determines —— —- and —— —–

A

Blood flow determines heart rate and stroke volume

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6
Q

Pressure

Change in pressure = ___ x _____

MAP = —- x —-

Anything that increases , —- —, —— —– or ——– will increase pressure

Change in pressure = —— usually in theory because —– pressure is minimal so it can be ignored.

If cardiac output increases during exercise resistance decreases to maintain the same mean arterial pressure

A

Pressure

Change in pressure = blood flow x Resistance

MAP = CO x TPR

Anything that increases , blood flow, cardiac output or resistance will increase pressure

Change in pressure = MAP usually in theory because venous pressure is minimal so it can be ignored.

If cardiac output increases during exercise resistance decreases to maintain the same mean arterial pressure

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