Heart Sounds And Valvular Disorders Flashcards
What sound does the heart make?
Lub Dub
What are heart sounds associated with?
Closing of the heart valves
Where are the four heart sounds heard?
Through S1 - S4
When does the LUB sounds happen and what occurs?
S1, occurs as AV valves close and signifies beginning of systole, ventricular contraction
When does the DUB sound happen and what occurs?
S2, occurs when the SL valves close at the beginning of ventricular diastole
What is heard in S3 and what happens?
Usually a faint sound and not heard in healthy adults. S3 is blood flowing into the ventricles
What is heard in S4 and what happens?
Usually faint sounds and not heard in healthy adults. S4 is atrial contraction, these are not associated with valve action.
Where do i listen to aortic heart sounds?
2nd intercostal space, right sternal border
Where do i listen to pulmonary heart sounds?
2nd intercostal space, left sternal border
Where do i listen to tricuspid heart sounds?
4th intercostal space, left sternal border
Where do i listen to bicuspid (mitral) heart sounds?
5th intercostal space, left mid clavicular line
Murmurs
Sustained noises that are audible during the time periods of systole, diastole or both
What are the causes of heart murmurs?
Backward regurgitation, forward flow, high rate of flow, vibration of loose structures
Backward regurgitation
Leaky valve, septal defect
Forward flow
Narrowed or deformed valve
