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24 Cards in this Set
- Front
- Back
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Put these events in order:
-SL valves close(2nd heart sound "dub") -T wave of EKG -ventricular systole begins -Ventricular diastole begins -P wave of EKG -QRS complex -AV valves close (1st heart sound "lub") -SL valves open -AV valves open -Atrial systole |
P wave of EKG -> atrial systole -> QRS complex (ventricular depolarization) -> ventricular systole begins -> AV valves close ("lub") ->SL valves open -> T wave of EKG -> ventricular diastole begins -> SL valves close("dub") -> AV valves open
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HARD
Label these events of left side of heart using letters above each section: -Ventricular systole -Isovolumetric contraction in left ventricle. -Rapid ejection phase (into aorta) -Reduced ejection phase -Isovolumetric relaxation phase -Rapid filling phase (AV valves open, SL valves closed) -Reduced ventricular filling phase -Atrial systole -Ventricular diastole -End of diastole -Ventricular systole -SL valves open -AV valves open |
-Ventricular systole is B,C,D.
-Isovolumetric contraction in left ventricle is B. -Rapid ejection phase is C. -Reduced ejection phase is D -Isovolumetric relaxation phase is E. -Rapid filling phase is F -Reduced ventricular filling phase is G. -Atrial systole is A -Ventricular diastole is E,F,G,A -End of diastole is between A + B. -Ventricular systole is B,C,D SL valves open during C,D AV valves open in F,G,A |
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What is the highest pressure during diastole of left ventricle?
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80mmHg
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What is pressure of the heart at the end of diastole?
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0mmHg
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What are the units for cardiac output?
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L/Min
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What is the equation for cardiac output? (two equations)
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Heart Rate(beats/min) x Stroke Volume(L/beat)
or CO=(MABP-Rt atrial BP)/TPR |
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what are units for heart rate?
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beats/min
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What are the units for stroke volume?
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L/Beat
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If heart rate is 70beats/min and Stroke volume is 75mL, what is cardiac output?
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5.25L
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If cardiac output is increased, Metabolic rate is _____(increased/decreased)
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increased
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During ventricular systole, the Pressure in the Right Atrium is _____(increased/decreased)
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increased
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While AV valves are closed, the _____ continues to fill
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Atria
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the amount of blood heart pumps/Unit time is ______
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Cardiac output
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The vagus is what division of ANS? what affect does the vagus have on HR?
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parasympathetic. lowers heart rate
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If cardiac output is decreased, _____(stroke volume/heart rate) is decreased.
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Heart rate
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If cardiac output increases, heart rate increases, what about the stroke volume?
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stays the same
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What is atropine and what effect does it have on heart rate.
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Antagonist for muscarinic receptors(parasymp/vagus). Increases heart rate
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Heart pumps all the blood it receives, blood that returns is called....
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venous return
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If venous return is increased, ______ is increased also.
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Cardiac output
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If Heart rate is unchanged but Stroke volume is increased, what happens to cardiac output?
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increased
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increase in venous return -> (increase/decrease) end diastolic volume -> (increase/decrease) stretch of ventricular muscle. ->(increase/decrease) myocardial contractility-> (increase/decrease) in stroke volume and Heart rate
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increased venous return -> increased end diastolic volume -> increased stretch of ventricular muscle ->increased myocardial contractility -> increased stroke volume and heart rate
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label: atrial fibrillation, complete atrioventricular block, atrial premature contraction, atrial tachycardia, ventricular tachycardia, ventricular premature contractions, nodal premature contractions, normal,ventricular fibrillation
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labeled
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-what does the line with increased contractility mean(mention ANS and SV)?
-Which line in middle picture represents greater parasympathetic stimulation? |
-increased contractility means more activity from sympathetic NS, and increased stroke volume.
-the lowest line, decreased contractility. |
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-at what letters are SL valves open and blood ejected from ventricle?
-When are AV valves opened? -When does rapid injection phase start? -When does rapid ejection slow down? -Where is isololumentric contraction and relaxation? -where is there a slight increase in ventricular volume becuase atrial contracts? |
-SL valves open and blood ejected from ventricle during C+D. (aortic)
-AV valves open during F,G,A.(mitral). -rapid injection starts at beginning of C. -rapid ejection slows during D. -Isovolumetric contraction is at B while relaxation is at E. -slight volume increase at A |
