Hemodynamics: Basics

As already mentioned, hemodynamics are the forces which circulate blood through the body.

Specifically, hemodynamics is the term used to describe the intravascular pressure and flow that occurs when the heart muscle contracts and pumps blood throughout the body. It is important to remember that the vascular system is a closed circuit. Pressure and flow variations in the venous compartment will necessarily affect the arterial compartment and vice versa. Therefore, a hemodynamic measurement is not simply a number in relation to a norm. Rather, it is the minute to minute pressure and flow variations that ocur within and between compartments.

Heart function is the main focus of hemodynamic studies but the heart is not the only factor influencing pressure and flow. There are four factors which influence hemodynamics. They are the three hemodynamic components to the circulation of blood in the body plus chronotropy.


Instant Feedback:

Of the 4 factors influencing hemodynamics, which one is concerned with the strength of myocardial contractions?

Intravascular volume
Intropy
Chronotropy
Vasoactivity


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