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