Summary: Cardiovascular System Skip 3
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1.28 cardiovascular system skip 3
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damage AV node releases ventricles from control of the SA node, resulting in a slower heart rate as ventricle contract at their own pace
heart block -
rapid uncoordinated spasming of the heart muscle
firbillation -
rapid heart rate over 100 beats per minute
tachycardia -
slow heart rate less than 60 beats per minute
bradycardia -
mid to late diastole events
pressure in heart is low
blood flows passively into atria and into ventricles
semilunar valves are closed
atrioventricular valves are open
atria contract and force blood into ventricles -
semilunar valves open in
ventricular systole -
blood travels out of ventricles into pulmonary trunk and aorta in
ventricular systole -
cardiac output = __ x __
heart rate x stroke volume -
the more the cardiac muscle is stretched during exercise the stronger the contraction
starling's law of the heart -
sympathetic nervous system can effect heart rate through
crisis
blood loss
decreased blood volume
very low blood pressure
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