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46 Cards in this Set

  • Front
  • Back
What are the components of the cardiovascular system?
blood vessels
Does the pulmonary circuit have low or high pressure?
pulmonary circuit involves which side of the heart?
the flow of venous blood (low in O2 and high in CO2)
pulmonary circuit
Pathway of blood through the pulmonary circuit
SVC-IVC-coronary sinus-rt.atrium-tricuspid valve-rt ventricle-pulmonary semilunar valve-pulmonary trunk- rt. and lt. pulmonary arteries-rt. and lt. lungs
Does the systemic circuit have high or low pressure?
the flow of arterial blood to the tissues (high in O2 low in CO2)
systemic circuit
Which side of the heart does the systemic circuit involve?
left side of heart
Describe the flow of the systemic circuit
rt and lt pulmonary veins-lt atrium-bicuspid valve-lt ventricle-aortic semilunar valve-aorta-systemic tissues
What is the job of the valves?
they all prevent the back flow of blood
What is the function of the coronary circuit?
feeds blood directly to the heart
Coronary sinus function?
drains venous blood from heart itself
Superior vena cava function?
drains venous blook from structures above the heart
IVC function?
drains venous blood from structures below the heart
Tricuspid and bicuspid valve function?
prevent the back flow of blood
pulmonary semilunar valve function?
prevents the back flow of blood
Pulmonary trunk function?
sends blood to the lungs
left pulmonary artery function?
conveys venous blood to the rt and lt lung
right pulmonary artery function?
conveys venous blood to the rt. and lt. lung
rt. and lt. pulmonary veins function?
collect arterial blood from rt. and lt. lungs
aortic semilunar valve function?
prevents the back flow of blood
Name the Ions involved in a cardiac muscle fiber contraction
sodium, calcium, potassium
AV node function?
slows down the spread of the depolarization, allows atria time to fully contract and the ventricles to fully fill
SA node function?
spontaneously depolarizes, depolarization spreads through the atria due to the intercalated discs, resulting contraction pushes the blood down toward the ventricles, depolarization reaches the AV node
AV bundle and Lt and Rt bundle branches are?
specialized cells that convey the depolarization toward the apex (bottom) of the heart
purkinje fibers function?
spread depolarization throughout the apex of the heart, resulting contraction will push the blood up from the apex toward the pulmonary trunk and aorta
SA node is also known as....
EKG or ECG does what?
measures electrical activity of the heart
p wave corresponds to the....
depolarization of atria followed by contraction of atria
QRS wave corresponds to.....
the depolarization of ventricles
T wave corresponds to....
the repolarization of the ventricles, followed by ventricular relaxation
PR interval corresponds to....
the length of time it takes for the depolarization to spread from the SA node to the AV node
Normal sinus rhythm is....
normal wave forms 60-100bpm
Sinus bradycardia is...
normal wave forms less 60bpm
Sinus tachycardia is...
normal wave forms over 100bpm
atrial flutter is....
abnormal EKG with an atrial rate above 150 bpm, lots of P waves present in EKG (saw tooth pattern)
Ventricular flutter is also known as....
ventricular tachycardia (v-tach)
ventricular flutter is...
rapid coordinated contraction of the ventricles 150+ bpm
ventricular fibrillation is also known as.....
ventricular fibrillation is....
uncoordinated contraction of the ventricles ....bring out the paddles
If there is no electrical activity in the heart it is known as.....
asystole or flat line....dead
heart block is an....
abnormal EKG with an increased length of the PR interval, indicates a conduction system problem
cardiac output is the ....
amount of blood ejected from the left ventricle per minute
stroke volume is the....
amount of blood ejected from the lt. ventricle per beat
what is cardiac output at rest?
4-6 L per min
what is the cardiac output during excercise?
20-25 L per min