What are the concomitant valve lesions mentioned in the text?
- AS
- AR
- MS
- O MR
- TR
These lesions are relevant in the context of multiple or mixed valvular heart disease.
The Simplified Bernoulli equation overestimates gradient if what condition occurs?
LVOT velocity ↑
This can lead to misinterpretation of the severity of aortic stenosis.
What is a possible state indicated by low-flow low-gradient?
- MR-induced low-flow state
- TR induced low-flow state
These states can complicate the assessment of valve lesions.
Why is PHT unreliable in assessing certain valve lesions?
- Increased LV compliance
- Hypertrophy
- Disproportionate diastolic LV pressure overload
- Reduced preload
These factors affect the accuracy of pressure half-time (PHT) measurements.
In the context of MS, what makes PHT unreliable?
- LV compliance
- Altered LV compliance
- Low gradient due to low flow
These factors can lead to inaccurate assessments of mitral stenosis.
What is the continuity equation used for, and why can it be unreliable?
Used for MVA; unreliable due to increased transmitral flow
This can lead to miscalculations in mitral valve area (MVA) assessments.
What happens to the regurgitant volume in MR?
- Regurgitant volume ↑
- MR colour-flow jet area ↑
This is due to increased afterload and transmitral systolic pressure gradient.
What makes the Doppler volumetric method using net aortic forward flow invalid?
Increased transaortic flow
This can lead to inaccurate assessments in cases of mitral regurgitation.
What can calcifications do in the context of MR?
Shadow jet area
This can complicate the visualization and assessment of mitral regurgitation.
What are the robust echo measurements used in assessing valvular heart disease?
- AS AVA (continuity equation)
- DVI
- EROA (PISA)
- Vena contracta
These measurements help in evaluating the severity of various valvular conditions.
Which alternative imaging modalities are mentioned for assessing valvular heart disease?
- CT: AV calcium scoring
- CMR: regurgitant volume & fraction
These modalities provide complementary information to echocardiography.
In mixed AR and AS, what parameters reflect the combined burden?
- Vma
- mean gradient
These parameters help in understanding the severity of the combined aortic regurgitation and stenosis.
In mixed MR and MS, what parameters reflect the combined burden?
- mean gradient
This parameter is crucial for assessing the severity of mitral regurgitation and stenosis together.
What does CMR stand for in the context of valvular heart disease imaging?
Cardiac Magnetic Resonance
CMR is used to assess regurgitant volume and fraction.
What is the significance of planimetry and 3D MVA (TOE) in valvular heart disease?
They are used to assess mitral stenosis
These techniques provide accurate measurements of the mitral valve area.
