CCI - Cardiovascular Credentialing International Valvular Pathology Assessment Questions and Answers — Questions and Answers
Question 1: A patient undergoes an echocardiogram for evaluation of a heart murmur. The results show a peak aortic valve velocity of 4.5 m/s, a mean pressure gradient of 50 mmHg, and a calculated aortic valve area of 0.9 cm². According to current guidelines, how would this aortic stenosis be classified?
- Mild
- Moderate
- Severe (Correct answer)
- Critical
Correct answer: Severe
According to the American College of Cardiology/American Heart Association (ACC/AHA) and European Society of Cardiology (ESC) guidelines, severe aortic stenosis is defined by a peak velocity >4 m/s, a mean gradient >40 mmHg, and an aortic valve area <1.0 cm². This patient's findings all fall within the 'severe' category.
Question 2: When assessing a patient for mitral valve prolapse (MVP) using 2D echocardiography, which view is considered essential for minimizing false positives and confirming the diagnosis?
- Apical four-chamber
- Subcostal
- Parasternal short-axis
- Parasternal long-axis (Correct answer)
Correct answer: Parasternal long-axis
The parasternal long-axis view is crucial for diagnosing mitral valve prolapse. This view avoids the saddle-shape of the mitral annulus which can cause a false positive appearance of prolapse in the apical four-chamber view. True MVP is defined as systolic displacement of one or both mitral leaflets >2 mm above the mitral annular plane in the parasternal long-axis view.
Question 3: A 68-year-old male with a history of rheumatic heart disease presents with dyspnea on exertion. Echocardiography reveals severe tricuspid regurgitation. Which of the following quantitative parameters, derived from the PISA method, is most indicative of severe TR?
- Vena Contracta width of 4 mm
- Effective Regurgitant Orifice Area (EROA) of 0.45 cm² (Correct answer)
- Jet area of 8 cm²
- Peak E-wave velocity of 0.8 m/s
Correct answer: Effective Regurgitant Orifice Area (EROA) of 0.45 cm²
An Effective Regurgitant Orifice Area (EROA) ≥ 0.40 cm² is a specific criterion for severe tricuspid regurgitation. A vena contracta width of ≥ 7 mm is considered severe. Jet area is a less specific, qualitative measure. Peak E-wave velocity relates to diastolic function, not directly to the severity of regurgitation.
Question 4: In the evaluation of a bioprosthetic aortic valve, which of the following Doppler findings is most suggestive of significant prosthetic valve stenosis?
- Peak velocity of 2.5 m/s
- Triangular, early-peaking CW Doppler profile
- Doppler Velocity Index (DVI) of 0.5
- Acceleration time (AT) > 100 ms (Correct answer)
Correct answer: Acceleration time (AT) > 100 ms
An acceleration time (AT) greater than 100 ms, along with a more rounded, late-peaking CW Doppler profile, is a strong indicator of prosthetic aortic valve stenosis. While peak velocities are often increased in normally functioning prosthetic valves, an AT >100 ms is more specific for obstruction. A DVI < 0.25 is indicative of stenosis; 0.5 is normal. A triangular, early-peaking profile is characteristic of a non-stenotic valve.
Question 5: A patient is found to have significant pulmonic regurgitation (PR) on a routine echocardiogram. Which of the following is an established echocardiographic criterion for classifying the PR as severe?
- A brief, early diastolic color Doppler jet
- Pressure half-time (PHT) of 250 ms
- Regurgitant jet width <50% of the RVOT diameter
- Diastolic flow reversal in the branch pulmonary arteries (Correct answer)
Correct answer: Diastolic flow reversal in the branch pulmonary arteries
The presence of diastolic flow reversal in the branch pulmonary arteries is a specific and supportive sign of severe pulmonic regurgitation. Other signs of severe PR include a dense CW signal with a steep deceleration slope (PHT <100 ms) and a wide color Doppler jet origin.
Question 6: During the assessment of a mechanical mitral prosthesis, an increased mean gradient is noted. Which of the following parameters would be most useful to differentiate true stenosis from a high-flow state?
- Pressure Half-Time (PHT)
- Doppler Velocity Index (DVI) (Correct answer)
- Left ventricular outflow tract (LVOT) diameter
- Peak E-wave velocity
Correct answer: Doppler Velocity Index (DVI)
The Doppler Velocity Index (DVI), calculated as the ratio of the VTI of the prosthetic valve to the VTI of the LVOT, is a relatively flow-independent measure. In a high-flow state, both VTIs will increase, keeping the ratio relatively stable. In true stenosis, the prosthetic VTI will be disproportionately high compared to the LVOT VTI, resulting in an increased DVI (for mitral prostheses, a DVI > 2.2 may suggest dysfunction).
CCI - Cardiovascular Credentialing International Valvular Pathology Assessment Questions and Answers
A patient undergoes an echocardiogram for evaluation of a heart murmur.
The results show a peak aortic valve velocity of 4.5 m/s, a mean pressure gradient of 50 mmHg, and a calculated aortic valve area of 0.9 cm².
According to current guidelines, how would this aortic stenosis be classified?