Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
6 Cards in this Set
- Front
- Back
|
Heart Sounds – 1st and 2nd
|
First heart sound: At beginning of ventricular systole
Closing of the AV valves Low pitch sound of long duration “Lub” sound – is audible Second heart sound: At end of ventricular systole Closing of semilunar valves Rapid snapping sound of short duration “Dub” sound – is audible |
|
|
Heart Sounds – 3rd and 4th
|
Third heart sound
Weak rumbling sound occasionally heard during middle third of diastole Sound of ventricles filling causing reverberation along ventricle walls During heart failure, S3 gallop may be heard Fourth heart sound Sound of atria contracting Very weak sound Rarely heard |
|
|
Aortic Stenosis
|
Systolic murmur
Loud & harsh Occurs as a result of “nozzle effect” during systole Turbulent blood flow against aortic walls causes the harsh murmur Sometimes has an associated thrill over upper chest & neck |
|
|
Aortic Regurgitation
|
Diastolic murmur
Blood flows backward from high pressure aorta into low pressure L ventricle High pitched “blowing” murmur , swishing sound Heard maximally over L ventricle |
|
|
Mitral Stenosis
|
Diastolic murmur
May have “opening snap” Weak, low frequency murmur Pressure in L atrium seldom rises above 30 mm Hg, there is no large pressure gradient pushing blood from L atria to L ventricle Heard after first 1/3 of diastole L ventricle with stenosed mitral valve has very little blood in it; therefore, no reverberation of blood occurs |
|
|
Mitral Regurgitation
|
Systolic murmur
High frequency “blowing” murmur, swishing sound Occurs as blood flows backward through mitral valve into L atrium during systole Best heard through L ventricle to apex |
