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24 Cards in this Set

  • Front
  • Back
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
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
What is the highest pressure during diastole of left ventricle?
What is pressure of the heart at the end of diastole?
What are the units for cardiac output?
What is the equation for cardiac output? (two equations)
Heart Rate(beats/min) x Stroke Volume(L/beat)
CO=(MABP-Rt atrial BP)/TPR
what are units for heart rate?
What are the units for stroke volume?
If heart rate is 70beats/min and Stroke volume is 75mL, what is cardiac output?
If cardiac output is increased, Metabolic rate is _____(increased/decreased)
During ventricular systole, the Pressure in the Right Atrium is _____(increased/decreased)
While AV valves are closed, the _____ continues to fill
the amount of blood heart pumps/Unit time is ______
Cardiac output
The vagus is what division of ANS? what affect does the vagus have on HR?
parasympathetic. lowers heart rate
If cardiac output is decreased, _____(stroke volume/heart rate) is decreased.
Heart rate
If cardiac output increases, heart rate increases, what about the stroke volume?
stays the same
What is atropine and what effect does it have on heart rate.
Antagonist for muscarinic receptors(parasymp/vagus). Increases heart rate
Heart pumps all the blood it receives, blood that returns is called....
venous return
If venous return is increased, ______ is increased also.
Cardiac output
If Heart rate is unchanged but Stroke volume is increased, what happens to cardiac output?
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
increased venous return -> increased end diastolic volume -> increased stretch of ventricular muscle ->increased myocardial contractility -> increased stroke volume and heart rate
label: atrial fibrillation, complete atrioventricular block, atrial premature contraction, atrial tachycardia, ventricular tachycardia, ventricular premature contractions, nodal premature contractions, normal,ventricular fibrillation
-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.
-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