1. CV intro Flashcards
Normal Heart Sounds in Adults:
S1 (Lub) & S2 (Dub)
The S1 (Lub) sound is caused by the closure of which valves
The AV (atrioventricular) valves.
The AV valves include which 2 valves
the tricuspid (R side) and Mitral (L side)
Where is the S1 sound loudest?
At the apex of the heart (midclavicular, 5th intercostal space)
The S1 sound marks the end of ___ and the beginning of ___
diastole;
systole
The S2 (Dub) sound is caused by the closure of which valves?
The semilunar valves.
The semilunar valves include which valves
The pulmonic and aortic valves.
Where is the S2 sound loudest?
At the base of the heart (right sternal border, 2nd intercostal space).
The S2 sound marks the end of ____ and the beginning of ____
systole;
diastole
S2 (dub) splits on inspiration or expiration?
Inspiration
Wide, fixed splitting of S2 (dub) is caused by ___
RBBB (right bundle branch block)
S2 (dub) is louder with which condition?
Pulmonary Embolism
Each of the 4 valves has an auscultatory point on the chest wall. What are these points?
- Aortic Area
- Pulmonic Area
- Erb’s Point
- Tricuspid Area
- Mitral (apical) area
Where is the aortic area?
Anatomically, it is at the 2nd intercostal space (ICS), right sternal border. It is the base of the heart. It is where S2 (“Dub”) is loudest.
Where is the mitral area?
Anatomically, it is at the 5th intercostal space (ICS), midclavicular line. It is the apex of the heart where S1 (“Lub”) is the loudest.
