Download [BEC011] BEC011 Basic Echo Certification Exam Preparation and more Exams Technology in PDF only on Docsity!
Preparation
Question 1. Which ultrasound property determines the axial resolution of an image? A) Frequency B) Beam width C) Pulse duration D) Gain Answer: C Explanation: Axial resolution depends on pulse length; shorter pulses (shorter duration) improve axial resolution. Question 2. In soft tissue, the speed of sound is approximately: A) 1500 m/s B) 340 m/s C) 3000 m/s D) 1000 m/s Answer: A Explanation: The average speed of sound in soft tissue is about 1540 m/s, often rounded to 1500 m/s for calculations. Question 3. Which phenomenon causes loss of ultrasound energy as it passes through tissue? A) Reflection B) Refraction C) Attenuation D) Scattering Answer: C
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Explanation: Attenuation is the combined effect of absorption, scattering, and reflection that reduces beam intensity with depth. Question 4. The piezoelectric effect in an ultrasound transducer converts: A) Mechanical pressure into electrical voltage B) Electrical voltage into magnetic field C) Light into sound D) Heat into mechanical vibration Answer: A Explanation: Piezoelectric crystals generate an electric charge when compressed and vibrate to produce ultrasound when an electric voltage is applied. Question 5. Which transducer type provides the narrowest sector angle and highest frame rate for cardiac imaging? A) Linear array B) Curvilinear array C) Phased‑array sector probe D) Endocavitary probe Answer: C Explanation: Phased‑array sector probes emit a narrow fan‑shaped beam, allowing rapid acquisition of multiple lines per cardiac cycle. Question 6. Increasing the bandwidth of a transducer primarily improves: A) Axial resolution B) Lateral resolution C) Depth of penetration
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C) The angle of insonation D) The depth of the sample volume Answer: A Explanation: The Nyquist limit equals ±½ PRF; velocities exceeding this cause aliasing. Question 10. Continuous‑wave Doppler can accurately measure high velocities because: A) It uses a single sample volume B) It has an unlimited Nyquist limit C) It employs a low PRF D) It applies angle correction automatically Answer: B Explanation: CW Doppler transmits and receives continuously, eliminating the Nyquist limit, allowing measurement of high‑velocity flows without aliasing. Question 11. In color flow Doppler, the direction of blood flow is indicated by: A) The hue (red vs. blue) B) The brightness of the pixel C) The size of the color box D) The frame rate Answer: A Explanation: Red typically denotes flow toward the transducer, blue denotes flow away, based on the color map. Question 12. Tissue Doppler Imaging (TDI) primarily measures: A) Blood flow velocity B) Myocardial wall velocity
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C) Valve orifice area D) Aortic pressure gradient Answer: B Explanation: TDI evaluates the velocity of myocardial tissue movement, useful for diastolic function assessment. Question 13. To minimize Doppler angle error, the ultrasound beam should be aligned: A) Perpendicular to flow (0°) B) Parallel to flow (90°) C) At 45° to flow D) At any angle, as angle correction compensates automatically Answer: A Explanation: The Doppler equation is most accurate when the beam is parallel to flow (0° incidence), minimizing cosine error. Question 14. Which standard parasternal view displays the left ventricular outflow tract and aortic valve? A) Parasternal short‑axis at the papillary muscle level B) Parasternal long‑axis (PLAX) C) Parasternal long‑axis at the mitral valve level D) Parasternal short‑axis at the aortic valve level Answer: B Explanation: PLAX includes the LVOT, aortic valve, mitral valve, and left atrium. Question 15. The apical 4‑chamber view best visualizes which structure? A) Aortic valve leaflets
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Question 18. Regional wall motion abnormality (RWMA) in the inferior wall most commonly corresponds to which coronary artery? A) Left anterior descending (LAD) B) Right coronary artery (RCA) C) Left circumflex (LCx) D) Posterior descending artery (PDA) Answer: B Explanation: The RCA supplies the inferior wall; ischemia here produces inferior RWMA. Question 19. Tricuspid annular plane systolic excursion (TAPSE) is measured in which view? A) Parasternal long‑axis B) Apical 4‑chamber C) Subcostal four‑chamber D) Suprasternal notch Answer: B Explanation: TAPSE is obtained in the apical 4‑chamber view by M‑mode tracing the lateral tricuspid annulus motion. Question 20. An E/A ratio >2 with a short deceleration time suggests: A) Normal diastolic function B) Grade I (impaired relaxation) C) Pseudonormalization D) Grade III (restrictive filling) Answer: D Explanation: A high E/A ratio with rapid deceleration indicates restrictive filling, characteristic of advanced diastolic dysfunction.
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Question 21. The simplified Bernoulli equation ΔP = 4v² is used to estimate: A) Valve area B) Pressure gradient across a stenotic valve C) Cardiac output D) Pulmonary artery pressure Answer: B Explanation: By inserting the Doppler‑derived velocity (v) into ΔP = 4v², the pressure gradient across a stenotic valve is calculated. Question 22. The continuity equation for aortic valve area (AVA) requires measurement of: A) LV outflow tract (LVOT) diameter, LVOT velocity‑time integral (VTI), and aortic valve VTI B) Mitral valve inflow VTI only C) Pulmonary artery pressure D) Right ventricular outflow tract diameter Answer: A Explanation: AVA = (LVOT area × LVOT VTI) / Aortic valve VTI; LVOT diameter is squared to obtain area. Question 23. In color Doppler, a regurgitant jet that occupies more than 65 % of the left atrial area suggests: A) Mild mitral regurgitation B) Moderate mitral regurgitation C) Severe mitral regurgitation D) Trivial regurgitation Answer: C
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D) Lipoma Answer: B Explanation: Myxomas commonly arise from the fossa ovalis region of the interatrial septum, appear pedunculated, and are mobile. Question 27. In the setting of an aortic dissection, the intimal flap on echo appears as: A) A hyperechoic linear structure within the lumen that moves with the cardiac cycle B) An anechoic cystic structure adjacent to the aorta C) A calcified ridge in the aortic wall D) A turbulent color Doppler jet without a structural correlate Answer: A Explanation: The intimal flap is a thin, echogenic membrane separating true and false lumens, seen moving synchronously with the pulse. Question 28. Reverberation artifact is most commonly produced by: A) Highly reflective structures such as calcifications or prosthetic valves B) Air bubbles in the transducer gel C) Inadequate gain settings D) Low transducer frequency Answer: A Explanation: Reverberation occurs when ultrasound waves bounce repeatedly between two strong reflectors, creating equally spaced duplicate images. Question 29. Mirror image artifact in cardiac echo is caused by: A) Refraction of the beam at a steep angle
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B) Reflection from the pericardium acting as a mirror C) Side‑lobe interference D) Attenuation in deep tissue Answer: B Explanation: The pericardium can reflect ultrasound, producing a duplicated structure on the opposite side of the true anatomy. Question 30. To increase lateral resolution in a sector scan, one should: A) Increase the number of scan lines (higher line density) B) Decrease the frequency of the transducer C) Increase the depth of field D) Reduce the gain Answer: A Explanation: Higher line density reduces beam width laterally, improving lateral resolution. Question 31. The optimal frame rate for assessing rapid mitral inflow patterns is at least: A) 10–15 fps B) 20–30 fps C) 40–60 fps D) 80–100 fps Answer: C Explanation: High temporal resolution (≥40 fps) is needed to accurately capture the rapid E and A waves of mitral inflow. Question 32. When using pulsed‑wave Doppler to assess mitral inflow, the sample volume should be placed:
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Question 35. The “saddle‑shaped” septum is most commonly associated with: A) Hypertrophic cardiomyopathy B) Dilated cardiomyopathy C) Restrictive cardiomyopathy D) Normal aging Answer: A Explanation: In hypertrophic cardiomyopathy, the basal septum often shows a systolic anterior motion creating a “saddle” shape. Question 36. The most reliable echocardiographic measurement of right ventricular systolic pressure (RVSP) is derived from: A) Tricuspid regurgitant jet velocity using the simplified Bernoulli equation plus right atrial pressure estimate B) Pulmonary artery Doppler flow profile C) RV outflow tract diameter D) TAPSE value Answer: A Explanation: RVSP = 4(v_TR)² + estimated RA pressure; the TR jet provides the velocity needed for calculation. Question 37. In a patient with severe mitral stenosis, the mean transmitral gradient is best measured by: A) Continuous‑wave Doppler across the mitral valve B) Pulsed‑wave Doppler at the mitral annulus C) Color Doppler mapping of the jet area D) M‑mode measurement of leaflet opening time
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Answer: A Explanation: CW Doppler records the highest velocities across the stenotic valve, allowing accurate mean gradient calculation. Question 38. A “flail” mitral leaflet on 2‑D echo indicates: A) Restricted leaflet motion due to calcification B) Complete rupture of chordae tendineae causing the leaflet to prolapse into the left atrium C) Normal systolic excursion D) Papillary muscle dysfunction Answer: B Explanation: Flail leaflet results from chordal rupture, leading to a mobile, prolapsing leaflet tip. Question 39. The presence of a “smoke” appearance in the left atrium on echo most often suggests: A) Atrial fibrillation with spontaneous echo contrast due to low flow velocities B) Acute pericardial effusion C) Pulmonary embolism D) Left ventricular hypertrophy Answer: A Explanation: Spontaneous echo contrast (“smoke”) occurs in low‑velocity blood, commonly seen in atrial fibrillation and predisposes to thrombus formation. Question 40. Which of the following is a characteristic of a prosthetic mechanical aortic valve on color Doppler? A) Central, narrow jet with high velocity B) Wide, low‑velocity jet due to regurgitation
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A. Parasternal long‑axis B. Suprasternal notch view C. Subcostal short‑axis D. Apical 5‑chamber view Answer: B Explanation: The suprasternal notch view provides a clear longitudinal section of the aortic arch and its branches. Question 44. In the assessment of left atrial size, the preferred measurement is: A) Anteroposterior diameter in the parasternal long‑axis B) Volumetric calculation using the biplane area‑length method in apical views C) Width in the subcostal view D) Diameter in the short‑axis view at the level of the aortic valve Answer: B Explanation: Biplane area‑length method yields LA volume, which is more accurate than linear dimensions. Question 45. The term “systolic anterior motion” (SAM) of the mitral valve is most commonly observed in: A) Dilated cardiomyopathy B) Hypertrophic obstructive cardiomyopathy (HOCM) C) Aortic stenosis D) Mitral valve prolapse Answer: B Explanation: SAM occurs when the hypertrophied septum pushes the anterior mitral leaflet toward the LVOT, causing obstruction.
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Question 46. In a patient with pulmonary hypertension, which echocardiographic finding is most indicative of elevated pulmonary artery pressure? A) Enlarged right atrium only B) Flattened interventricular septum during systole (D‑shaped left ventricle) C) Hyperdynamic left ventricular systolic function D) Increased mitral inflow E‑wave velocity Answer: B Explanation: A D‑shaped LV reflects right ventricular pressure overload, a hallmark of pulmonary hypertension. Question 47. The “pulsed‑wave aliasing” artifact is resolved by: A) Increasing the PRF above the Nyquist limit B) Decreasing the sample volume size C) Using a lower transducer frequency D) Applying a color gain reduction Answer: A Explanation: Raising the pulse repetition frequency moves the Nyquist limit higher, preventing aliasing of high velocities. Question 48. In tissue harmonic imaging, the transmitted frequency is typically: A) The same as the received frequency B) Half the received harmonic frequency C) Twice the received harmonic frequency D) Unrelated to the received frequency Answer: B
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D) No flow is visualized on color Doppler Answer: A Explanation: Most ASDs cause a left‑to‑right shunt due to higher left atrial pressure. Question 52. The “L‑type” diastolic filling pattern on transmitral Doppler is characterized by: A) A prominent E‑wave and reduced A‑wave (E/A > 2) with short deceleration time B) Reversed E/A ratio (<1) with prolonged deceleration time C) Equal E and A velocities (E/A ≈ 1) D) Absence of A‑wave due to atrial fibrillation Answer: A Explanation: An L‑type pattern indicates restrictive filling with high early velocity and rapid deceleration. Question 53. Which imaging plane is optimal for measuring the left ventricular outflow tract (LVOT) diameter? A) Parasternal long‑axis at the aortic valve level B) Apical 5‑chamber view C) Subcostal short‑axis at the level of the aortic valve D) Parasternal short‑axis at the papillary muscle level Answer: A Explanation: LVOT diameter is measured in PLAX just proximal to the aortic valve leaflets. Question 54. In the presence of a pericardial effusion, which echocardiographic finding indicates impending tamponade? A) Swinging heart motion
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B) Right ventricular diastolic collapse C) Left atrial enlargement D) Increased mitral inflow velocities Answer: B Explanation: Early diastolic collapse of the RV free wall is a hallmark of tamponade physiology. Question 55. The “M‑mode” cursor placed across the mitral valve leaflets in the parasternal long‑axis view is primarily used to assess: A) Leaflet thickness B) Opening and closing times (E‑ and A‑points) for diastolic function C) Regurgitant jet width D) Pulmonary vein flow pattern Answer: B Explanation: M‑mode provides precise timing of valve motion, allowing measurement of E‑ and A‑points. Question 56. Which of the following is the most accurate method to calculate cardiac output by echocardiography? A) Stroke volume derived from LVOT area × LVOT VTI multiplied by heart rate B) End‑diastolic volume multiplied by heart rate C) Mitral inflow VTI multiplied by heart rate D) TAPSE multiplied by heart rate Answer: A Explanation: Cardiac output = SV × HR; SV is obtained from LVOT area and VTI, providing reliable measurement.
