Valvular Heart Disease Flashcards
Heard during rapid ventricular filling
- Normal in younger patients
- In adults may indicate dilated ventricle with tending of chordae tendinae
S3
Atrial systole causes ejection of blood into a stiffened ventricle
S4
Caused by opening of stenosis aortic or pulmonic valve
Ejection Click
Usually seen in mitral stenosis
Opening Snap (OS)
Sound generated by turbulent blood flow as a result of structural or hemodynamics changes
Murmurs
Generated when there is flow between chambers that have widely different pressures throughout systole
Holosystolic/pansystolic murmers
Crescendo-decrescendo murmers that occur when blood is ejected across aortic or pulmonic outflow tracts
Midsystolic/systolic ejection
Starts shortly after S1 when ventricular pressure rises enough to open valve
Midsystolic/systolic ejection
Begin with S1 and end in mid systole
-Occurs In patients with acute MR
Early systolic murmers
High-pitched murmers at the left ventricular apex
-Start after S1 and end before or at S2
Mid to late systolic murmurs
Often due to tethering and malcoaptation of the mitral leaflets
Mid to late systolic murmurs
Begin with S2, when ventricular pressure drops below that in the aorta or pulmonary artery
-Usually high pitched and decrescendo
Diastolic murmurs
Usually originate from the mitral ad tricuspid valves
-Occur early during ventricular filling
Mid-diastolic murmurs
A classic example of a mid-diastolic murmur is
Mitral Stenosis
Due to a relative disproportion between valve orifice size and diastolic blood flow volume
Mid-diastolic murmur
Begin during the period of ventricular filling that follows atrial contraction
- Occur only in sinus rhythm
- Usually due to mitral or tricuspid stenosis
Presystolic murmurs/Late diastolic murmurs
Begin in systole, peak near S2, and continue into all or part of diastole
Continuous murmurs
Can be caused by venous hum, PDA, and AV fistulas
Continuous murmurs
Most commonly caused by rheumatic fever
Mitral stenosis
Characterized by acute and recurrent inflammation w/ leaflet thickening and calcification
Mitral stenosis
In mitral stenosis, narrowing of the valve causes decreased
Emptying into LV
Can cause dysphasia/hoarseness from compression of esophagus or left recurrent laryngeal nerve
LA enlargement from mitral stenosis
Causes typically higher heart rates as well as a loss of atrial kick
Atrial Fibrillation
CO becomes subnormal at rest and fails to increase during exercise in
Late/severe MS
Characterized by loud S1 early and soft S1 late
- Opening snap follows S2
- Mid-diastolic rumble
Mitral stenosis
One exam sign of severe mitral stenosis is a short
S2-OS interval
We want to treat with medications that slow the heart rate and thus increase diastolic filling time
Mitral Stenosis
One way to treat mitral stenosis is
Percutaneous Balloon Mitral Valvuloplasty
Due to structural abnormality related to the valve apparatus, leaflets, chordae tendinae, or papillary muscles
Primary Mitral Regurgitation (MR)
-also known as degenerative MR
Due to abnormal computation (closure) of the interval leaflets due to a dilated left ventricle causing dilation of the mitral annulus or pulling apart the chordae and leaflets
Secondary Mitral Regurgitation
-Also known as functional MR
A portion of LV stroke volume is ejected back into the LA resulting in increased LA volume and pressure and decreased forward CO
Mitral Regurgitation
Caused by an acute change such as papillary muscle rupture or torn chordae tendinae
Acute Severe MR
Compensated MR where SV is increased because LA and LV dilate
Chronic MR
Volume overload causes sufficient dilation to push the LV onto the downward portion of the Frank-Starling curve
Decompensated chronic MR
Results in deterioration of systolic function and symptoms of heart failure
Decompensated MR
Characterized by fatigue and dyspnea w/ increased abdominal girth and peripheral edema
Chronic MR