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16 Cards in this Set

  • Front
  • Back
S1 is heard
At the beginning of systole
What makes S1?
When intraventricular pressure exceeds atrial pressure so the av valves close (tricuspid/mitral)
What heartphase occurs after S1?
Systole - ventricular contraction
What happens to end systole?
When the pressure in the aorta and pulmonary vessels exceed that in the heart, they make the semilunar valves snap shut.
What is S2?
The sound of the aortic and pulmonary valves snapping shut
What are the 2 valves that make up S1?
What are the 2 valves that make up S2?
What valve shuts first during S1? Why?
The mitral valve - because pressure is so much higher on the left side of the heart.
What valve shuts first during S2? Why?
The Aortic. Because aortic pressure is much higher than pulmonary at the start of diastole.
What takes longer, diastole or systole?
Diastole - it is 2X longer
When auscultating how can you determine what is S1 versus S2?
Feel the pulse - when the pulse and heartbeat coincide, that is S1
When is a murmur heard?
During normally quiet diastole or systole
What should be noted first about a murmur?
-Where it is heard best
-Where it radiates to
What does inspiration do to the normal heartbeat?
Splits the S2
How do you know if a split S2 is nonpathologic?
It goes away with expiration
What would you suspect if there was a fixed split S2?
Atrial septal defect