Week 6:Cardiovascular Anatomy Review Flashcards
What is cardiac ouptput?
volume of blood ejected from the heart each minute
CO=SV*HR
How to calculate stroke volume?
the difference between the diastolic volume and the systolic volume
What factors influence the stroke volume?
preload, afterload, and contractility
What is preload?
the volume of blood in the heart
chamber volume BEFORE contraction
What is afterload?
force opposing ejection of the blood from the heart
What is contractility?
contractile capabilities of the heart?
What is Frank-Starling law?
the law that states that an increase in resting muscle fiber length results in greater muscle tension. Called the “length-tension” relationship
What does Frank Starling law say about the heart?
It has the ability to change it’s force of contraction in response to changes in venous return
What are the three fluid compartments of a cell?
intracellular, extracellular, interstitial
What is hydrostatic pressure?
the force that pushed fluid out of the capillaries into the interstitial and intracellular space
What is oncotic pressure?
the force that pulls fluid from the interstitial and intracellular space into the capillary
What is Starling’s law of capillary forces?
oncotic and hydrostatic pressure oppose each other at every capillary membrane and attempt to balance each other out
What happens with left ventricle failure?
The backward effect creates a buildup of hydrostatic pressure in the left atrium, pulmonary veins, and pulmonary capillaries
The forward failure effect causes decreased perfusion to the brain, kidneys, and other organs
What can left ventricle failure cause?
pulmonary edema
