CCI RCS 5 — Questions and Answers
Question 1: What is the normal range for mitral valve area (MVA) as measured by the pressure half-time (PHT) method?
- 1.0–2.0 cm²
- 4.0–6.0 cm² (Correct answer)
- 0.5–1.0 cm²
- 2.0–3.0 cm²
Correct answer: 4.0–6.0 cm²
Normal MVA is 4.0–6.0 cm²; severe mitral stenosis is defined as MVA ≤1.5 cm², with MVA = 220/PHT.
Question 2: Which safety concern is unique to transesophageal echocardiography (TEE) compared to transthoracic echocardiography (TTE)?
- Ultrasound bioeffects on myocardial tissue
- Risk of esophageal perforation and aspiration (Correct answer)
- Excessive radiation exposure
- Contrast agent anaphylaxis
Correct answer: Risk of esophageal perforation and aspiration
TEE requires esophageal intubation, introducing risks of esophageal perforation, laryngospasm, aspiration, and complications related to sedation not present with TTE.
Question 3: In a patient with a bicuspid aortic valve, which associated cardiovascular abnormality must be routinely assessed?
- Mitral valve prolapse
- Aortic root and ascending aorta dilation (Correct answer)
- Left ventricular non-compaction
- Pericardial constriction
Correct answer: Aortic root and ascending aorta dilation
Bicuspid aortic valve is associated with medial degeneration of the aortic wall, predisposing to aortic root and ascending aorta aneurysm independent of valve dysfunction.
Question 4: Which parameter derived from 3D echocardiography provides the most accurate non-geometric assessment of LV volumes compared to 2D methods?
- Simpson's biplane ejection fraction
- 3D-derived LV end-diastolic volume without geometric assumptions (Correct answer)
- M-mode fractional shortening
- Doppler-derived stroke volume
Correct answer: 3D-derived LV end-diastolic volume without geometric assumptions
3D echocardiography can trace the true LV endocardial surface without geometric assumptions, providing volumes that closely correlate with cardiac MRI as the reference standard.
Question 5: A patient with sarcoidosis has a dilated left ventricle with basal septal thinning and dyskinesis but preserved apical function. This regional pattern is MOST characteristic of:
- Left anterior descending artery territory infarction
- Non-ischemic cardiomyopathy with basal predominance (Correct answer)
- Apical hypertrophic cardiomyopathy
- Takotsubo (stress) cardiomyopathy
Correct answer: Non-ischemic cardiomyopathy with basal predominance
Sarcoid cardiomyopathy classically produces a non-ischemic pattern with basal and septal wall motion abnormalities that do not follow a coronary artery distribution.
Question 6: Which echocardiographic finding is most specific for acute right heart failure secondary to massive pulmonary embolism?
- Tricuspid regurgitation with TR velocity >3 m/s
- RV dilation with McConnell sign (akinetic mid free wall with preserved apical contractility) (Correct answer)
- Dilated inferior vena cava without respiratory variation
- Right-to-left shunting across a patent foramen ovale
Correct answer: RV dilation with McConnell sign (akinetic mid free wall with preserved apical contractility)
McConnell sign (regional RV free wall akinesis sparing the apex) has high specificity for acute pulmonary embolism and distinguishes it from other causes of RV pressure overload.
Question 7: When optimizing 2D image quality, which transducer frequency adjustment would BEST improve near-field resolution in an obese patient with a thick chest wall?
- Increase frequency to maximize axial resolution at depth
- Decrease frequency to improve penetration at the cost of resolution (Correct answer)
- Switch to a higher-frame-rate narrow sector
- Increase compression to enhance endocardial definition
Correct answer: Decrease frequency to improve penetration at the cost of resolution
Lower ultrasound frequencies penetrate tissue more effectively but with reduced resolution; in obese patients, lowering frequency is necessary to reach cardiac structures.
CCI RCS 5
What is the normal range for mitral valve area (MVA) as measured by the pressure half-time (PHT) method?