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Cardiovascular System Disorders (Pathophysiology Ch. 12)
Terms in this set (16)
blood going towards the heart
blood going away from the heart
Blood Flow Through the Heart
Superior & Inferior vena cava ---> Right Artium ---> (tricuspid valve) ---> Right Ventricle ---> (pulmonary valve) ---> Pulmonary Artery ---> Lungs (get rid of CO2 and pick up O2) ---> Left Atrium ---> (mitral valve) ---> Left Ventricle ---> (aortic valve) ---> Aorta ---> Rest of the Body!
Blood Flow Outside the Heart
Aorta ---> Brachial Artery ---> Arteriole ---> Capillary Beds (oxygenated blood becomes deoxygenated) ---> Venole ---> Vein ---> Vena Cave ---> Back to the Heart!
What happens to BP when traveling through the body?
Blood Pressure continues to decrease after leaving the heart until it returns to the Right Atrium
Cardiac Impulse Conduction
Impulses that initiate cardiac contractions
Electrical Impulse Pathway
1) Impulse originates at the SA node
2) Impulses travels from the SA node through the atrial conduction pathways (contraction of both atria takes place)
3) Impulses travel to the AV node (slight delay in conduction to allow complete ventricular filling)
4) Impulses travel to Bundle of His
5) Divides into right and left Bundle Branches
6) Purkinje network of fibers (stimulating simultaneous contraction of the two ventricles)
What is the atrial contraction represented by?
Depolarization in the P wave
What is the ventricular contraction represented by?
Depolarization in the QRS complex
What are arteries lined with that is critical to cardiovascular health?
What is Arterial Blood Flow dependent on?
-Degree of vasodilation or vasoconstriction
Blood flows in one direction
flow is smooth, easy, and undisturbed
Flows in layers
Vessels are OPEN!
Obstruction or bifurcation
Flow slows down
Blood flows in different directions
What does excess volume cause?
Vasodilation (distended vessels)
What does a deficit in volume cause?
Sluggish blood flow
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