Clinical Medicine 3: Murmurs, Valvular Disease (Johnston) Flashcards
What is the single most common sx associated w/ valvular heart disease?
Dyspnea on exertion
What are the 3 most common etiologies for valvular heart disease seen nowadays?
- Degenerative (senile calcification)
- Myxomatous degeneration (MVP) redundant
- Congenital (bicuspid aortic valve)
Stenosis of a valve leads to what type of overload and effect on heart?
Pressure overload; hypertrophy and HF
Regurgitation of a valve leads to what type of overload and effect on heart?
Volume overload; dilation
Which sex has a higher incidence of rheumatic heart disease?
Women 4:1
What are 6 minor jones criteria for rheumatic heart disease?
- Fever
- Arthralgia
- ↑ ESR or CRP
- Leukocytosis
- ECG - prolonged PR interval
- ↑ ASO titer or anti-DNAase B
How many major or combo of major/minor criteria need to be met for diagnosis of rheumatic heart disease?
- 2 major
OR
- 1 major + 2 minor
The narrowing of the mitral orifice seen in MS, leads to an increased pressure gradient where and what other changes?
- ↑ left AV pressure gradient
- LA enlargment –> afib, pulmonary vascular changes, RVH
Which decade is MS most common?
4th decade
Most common presenting sx’s of someone with mitral stenosis (MS)?
- Fatigue assoc. w/ decreased CO
- Dyspnea on exertion, cough, orthopnea, PND, pulmonary edema, hemoptysis
What is Ortner syndrome associated with MS?
Hoarsness due to compression of left recurrent laryngeal n. as LA ↑ in size
What is the common PE finding due to CO2 retention assoc. w/ pulmonary HTN seen in MS?
Malar rash
What are the ausculatory findings of S1 and S2 in pt with MS?
- ↑ loud S1 + ↑ S2 (P2 if PHT is present)
- Opening snap after S2 (if leaflet is mobile)
Describe the murmur associated with MS (i.e., phase of cardiac cycle, best heard where/position and with what part of stethoscope)?
- DIASTOLIC, low pitch, decrescendo, rumbling murmur
- Best heard at APEX w/ pt in left lateral decubitus position
- Use BELL
In MS there will be increased loud S1 and increased S2, what would the presence of loud P2 (pulmonic valve closure) signify?
Presence of pulmonary HTN
Common EKG finding of someone presenting with sx’s of severe MS?
Atrial fibrillation
What do the ‘p’ wave findings in lead I and V1 signify?
Left atrial enlargement
*‘M’ shaped ‘p’ wave = P mitrale
What does the CXR finding signify about the heart?
Left atrial enlargment; notice the straight line
If patient with MS is in atrial fibrillation, what should be given and why?
Anticoagulant; risk of emboli
Which invasive procedure for MS has a high success rate?
Percutaneous balloon valvuloplasty (Mitral Commissotomy)
What are the 2 etiologies of chronic mitral regurgitation (MR) and which is most common?
- Mitral valve prolapse = MOST common/myxomatous or degenerative MV
- Mitral annular calcification (MAC)
What are 4 causes of acute mitral valve regurgitation?
Which is 2nd most common cause of MR?
- Rupture of chordae tendineae
- Rupture of papillary muscle
- Ischemic papillary muscle dysf. due to CAD/MI = 2nd most common cause
- Infective endocarditis (IE); valve perforation
Acute MR leads to an abrupt increase in what (volume/pressure) and what complications follow?
↑ LA PRESSURE —> pulmonary edema, LVF
What will be seen on the ECG of someone with chronic MR?
- Left atrial enlargement
- ‘M’ shaped p wave in lead I and negative terminality of p wave in V1
How can acute MR present clinically signs/sx’s?
What’s a serious complication that can arise?
- Volume overload —> LV dilation
- LA HTN –> Pulmonary HTN –> RVF —> RHF/LHF
- Orthopnea and PND
- Can present with cardiogenic shock!
Upon auscultation of pt with MR what type of murmur is heard, describe it’s characteristics (i.e., best heard where, radiates, use bell or diaphragm..)?
- SYSTOLIC murmur (blowing, holosystolic; may be mid-late systolic) that radiates —> left axilla
- Best heard at APEX; use the diaphragm
What feature of the murmur heard with MR correlates with severity?
Loudness
What is the characteristic of S1 in pt with MR and if due to MVP what may be heard?
Decreased S1 or normal; may have systolic click if due to MVP