cardiovascular Flashcards
What can cause a S4 heart sound?
L ventricular hypertrophy-stiff ventricle
- almost always abnormal
When can you hear and S4 heart sound and what will you be hearing?
- heard before S1
- hear the atrial contraction
When is a split S1 sound best heart?
At the cardiac apex
When will you hear a split S2 sound?
When pt is inspiring and the R hear filling is increased
What are murmurs caused by?
Turbulent blood flow
What are some characteristics of heart murmurs?
Timing (systole/diastole) Location Provoking maneuvers Character (crescendo/decrescendo/holosystolic) Grading (scale of 1-6) 1 (faint) 3 moderately loud 6 (heard without stethoscope) Pitch (high, medium, low) Extra sounds? S3, S4, Opening Snap?
What is the PMI?
point of maximal impulse
- normally at teh L heart border, 5th intercostal space in the midclavicular line (not always palpable)
What causes the S1 sound?
mitral and triscupid valves close
What causes S2 heart sound?
aortic and pulmonic valves close
What causes S3 heart sound?
abrupt deceleration of inflow across the mitral valve
What causes S4 heart sound?
increased LV end diastolic stiffness and decreased compliance
When is an “opening snap” heard?
if there is restricted movement form mitral stenosis
When is the S3 heart sound heard?
just after S2, is normal in children/young adults
Where is the aortic valve located?
from R 2nd interspace to the apex
Where is the pulmonic valve located?
L 2nd and 3rd interspace near the sternum
Where is the tricuspid valve located?
at/near lower L sternal border
Where is the mitral valve located?
at and around the cardiac apex
When can systolic murmurs be heard?
in healthy pt’s, not pathologic.
will decrease w/ smaller ventricular volume