when the amount of the tissue death is small enough that undamaged muscle can still pump
MI results in pain called _______________.
angina pectoris (chest pain)
blood returns to the heart through the right and left ________ ____________
coronary arteries
when the heart is deprived of oxygen, it dies. This is called what? ______ ______
myocardial infarction (MI)
circulation from the heart is divided into how many types?
2
blockages can be corrected sometimes by using this type of surgery
coronary bypass
what is also known as the "natural pacemaker"?
sinoatrial (SA) node
the heart has its own built-in electrical conduction system. This is in 4 structures embedded in the heart wall. What are the names of these 4 structures?
SA node, AV node, AV bundle, and Purkinje fibers
what is the volume of blood pumped by one ventricle per minute called?
cardiac output
what delivers good blood to the heart and bad clood back to the venous system?
coronary circulation
This type of circulation moves the blood from the left ventricle throughout the body
systemic circulation
how long does each cardiac cycle take to complete?
0. 8 seconds
what is often a warning that the coronary artery is blocked and no longer functioning correctly
chest pain
what happens in coronary thrombosis and coronary embolism?
a blood clot plugs a coronary artery
what is a more common name for myocardial infarction?
heart attack
what is the volume of blood ejected from ventricles during each beat called?
stroke volume
This type of circulation moves blood from the right ventricle to the lungs
pulmonary circulation
the cardiac cycle is defines as what?
one complete heartbeat
the cardiac output of an average adult is about __________L.
5 Liters
atria and ventricles contract simultaneously because.........
they are electrically linked
In order to pump to the rest of the body, _______ requires a constant supply of blood with nutrients and oxygen
myocardium
the average adult heart rate is about how many bets per minute?
72
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