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26 Cards in this Set
- Front
- Back
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systole
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contraction
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distole
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relaxation
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Filling
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atria and ventricles relax
distole |
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Atrial systole
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2.Atrial systole: atria contract then relax
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Isovolumic ventricular contraction
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3. final phase of ventricular systole no volume change
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Ejection
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4.pressure in ventricals higher than pulmonary artery and aorta
semilunar valves opens ventricalr diastole |
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Isovolumic relaxation
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5.pressure in ventricles drop below pressure in pulmonary arteries and aorta
no volume chage |
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Onset filling
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6.start over
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S1
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ventricular systole
closure of AV valves |
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S2
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ventricular diastole
semilunar valves close |
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systolic murmur
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tricuspid or mitral valve do not close properly durning systole
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diastolic murmur
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aortic and pulmonary valves do not close properly
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AV valves
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mitral and tricuspid
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Semilunar valves
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aortic and pulmonary
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sources of energy
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fatty acids
glucose lactate |
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Stroke vloume
Pulse Pressure |
distolic-systolic volume
systoic-distolic aortic press |
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Mean arterial pressure
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diastolic aortic press +1/3 pulse pressure
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Cardiac output
Total peripheral resistance |
heart rate x stroke vooume
mean blood pressue/cardiac out |
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Mean arterial blood pressure
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tpr x cardiac out put
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Ejection fraction
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stroke volume/end diastolic volume
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Four factors determin cardiac output
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preload blood returing to heart
afterload resistance to ejection heart rate myocardial contractility: strength of cardiac contraction |
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Pre load
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amount of blood returning to heart
end diastolic volume starling law of heart: muscle fbers streched [] up |
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Afterload casued by
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Resistance
Pressure in aorta TPR Narrowing of aorta |
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Myocardial Contractility
Increased by |
Stregth of []
Increased by NE Epi Increased Ca++ digitals: increases Ca++ |
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Sympathic stimulation
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SA node increases heart rate
incresed force of [] NE released b-blocker |
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Parasympathetic stimulation
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Slows heart rade SA node
no change in [] ACH released on nicotic and musacrinic receptors Atropine blocks musacrinic |
