Cardio| Hemodynamics
Nov 18, 2022•5 min•Season 1Ep. 3
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Episode description
1.03 Hemodynamics.
Cardiovacular system reveiw for the USMLE Step 1 exam.
- Hemodynamics studies blood flow through the body
- Volumetric flow rate (Q) describes the volume of material moving through space per unit time, in terms of psychiatry it is the amount of blood moving through a vessel per unit time
- Volumetric flow rate is proportional to radius to the 4th power, so when radius increases, volumetric flow rate increases
- Resistance is a measure of a blood vessel's opposition to blood flow
- Resistance is inversely proportional to radius to the 4th power, so when vessel radius is increased, resistance decreases
- For vessels in series, you can simply add the resistances of each up to get the total resistance
- For vessels in parallel, the total resistance is equal to the sum of the inverses of the resistances each vessel
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