N190 week 4 Exam with precise detailed
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solutions
Electrical Cardiac conduction system - correct answer✔✔SA node→ AV
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node & bundle of His→ R & L bundle branches→ purkinje fibers
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Intrinsic rate - correct answer✔✔60-100 from SA node
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Issues with SA node, causes issues with intrinsic rate
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--Changes rhythm & rate !Z !Z !Z
ECG - correct answer✔✔Recording of deflection of cardiac cycle
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Systole - correct answer✔✔Ventricular contraction
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Begins w/ closure of AV valves (S1)
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Ends with closure of aortic/pulmonic valves (S2)
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Diastole - correct answer✔✔Ventricular relaxation
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Begins w/ closure of aortic/pulmonic valves (S2)
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Ends w/ closure of AV valves (S1)
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, S1 - correct answer✔✔AV valves close
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S2 - correct answer✔✔Semilunar valves close
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S3 - correct answer✔✔Ventricular gallop
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Heard after S2!Z !Z
Ventricle reaches elastic limit
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Causes blood flow from atrium to slow rapidly
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Use bell of stethoscope
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S4 - correct answer✔✔Atrial gallop
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Heard before S1
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Active atrial contraction
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Cause late ventricular filling
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Use bell of stethoscope
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Clicks & snaps - correct answer✔✔Valvular disease
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Heart murmurs - correct answer✔✔Harsh, blowing sound
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solutions
Electrical Cardiac conduction system - correct answer✔✔SA node→ AV
!Z !Z !Z !Z !Z !Z !Z !Z !Z
node & bundle of His→ R & L bundle branches→ purkinje fibers
!Z !Z !Z !Z !Z !Z !Z !Z !Z !Z !Z
Intrinsic rate - correct answer✔✔60-100 from SA node
!Z !Z !Z !Z !Z !Z !Z
Issues with SA node, causes issues with intrinsic rate
!Z !Z !Z !Z !Z !Z !Z !Z
--Changes rhythm & rate !Z !Z !Z
ECG - correct answer✔✔Recording of deflection of cardiac cycle
!Z !Z !Z !Z !Z !Z !Z !Z
Systole - correct answer✔✔Ventricular contraction
!Z !Z !Z !Z
Begins w/ closure of AV valves (S1)
!Z !Z !Z !Z !Z !Z
Ends with closure of aortic/pulmonic valves (S2)
!Z !Z !Z !Z !Z !Z
Diastole - correct answer✔✔Ventricular relaxation
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Begins w/ closure of aortic/pulmonic valves (S2)
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Ends w/ closure of AV valves (S1)
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, S1 - correct answer✔✔AV valves close
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S2 - correct answer✔✔Semilunar valves close
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S3 - correct answer✔✔Ventricular gallop
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Heard after S2!Z !Z
Ventricle reaches elastic limit
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Causes blood flow from atrium to slow rapidly
!Z !Z !Z !Z !Z !Z !Z
Use bell of stethoscope
!Z !Z !Z
S4 - correct answer✔✔Atrial gallop
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Heard before S1
!Z !Z
Active atrial contraction
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Cause late ventricular filling
!Z !Z !Z
Use bell of stethoscope
!Z !Z !Z
Clicks & snaps - correct answer✔✔Valvular disease
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Heart murmurs - correct answer✔✔Harsh, blowing sound
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