RCS Flashcards
7 cards from real CCI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 RCS flashcards as text
During a dobutamine stress echocardiogram, a new wall motion abnormality appears at peak stress in the mid-inferior wall. This suggests ischemia in the territory of which coronary artery?
Answer: Right coronary artery
The mid-inferior wall is supplied by the right coronary artery (RCA) in right-dominant circulations, the most common coronary anatomy.
A patient with an atrial septal defect (ASD) shows a dilated right ventricle and flattening of the interventricular septum in diastole. This septal morphology indicates:
Answer: Right ventricular volume overload
Diastolic septal flattening (D-shaped LV in short axis) indicates right ventricular volume overload, as seen in large ASDs with significant left-to-right shunting.
Which echocardiographic measurement is used to calculate Qp/Qs (pulmonary-to-systemic flow ratio) noninvasively?
Answer: RVOT VTI × RVOT area divided by LVOT VTI × LVOT area
Qp/Qs = (RVOT VTI × RVOT CSA) ÷ (LVOT VTI × LVOT CSA), using stroke volumes through the pulmonic and aortic valves respectively.
Which measurement on M-mode echocardiography is used to calculate fractional shortening (FS)?
Answer: LV end-diastolic and end-systolic internal dimensions
FS = (LVIDd – LVIDs) ÷ LVIDd × 100%, using M-mode LV internal dimensions at end-diastole and end-systole.
A 'smoke-like' spontaneous echo contrast is observed in the left atrium during TEE. This finding is associated with:
Answer: Increased risk of thrombus formation and systemic embolism
Left atrial spontaneous echo contrast ('smoke') reflects blood stasis due to low-flow states such as atrial fibrillation and is associated with thromboembolic risk.
The hepatic vein Doppler waveform shows blunted systolic filling fraction and systolic flow reversal. This pattern is MOST consistent with:
Answer: Severe tricuspid regurgitation
Severe tricuspid regurgitation causes systolic flow reversal in the hepatic veins as regurgitant volume is transmitted backward into the right atrium and venous system.
Which structure is identified by its characteristic 'seagull' appearance on parasternal long-axis echocardiography in a patient with rheumatic mitral stenosis?
Answer: Thickened, fused mitral leaflet tips with diastolic doming
Rheumatic mitral stenosis causes commissural fusion and leaflet thickening, producing characteristic diastolic doming ('hockey stick' or 'seagull' appearance) on 2D echo.