CCI RCS REGISTRY EXAM NEWEST 200 ACTUAL
QUESTIONS AND CORRECT ANSWERS WITH RATIONALE
LATEST 2026 ALREADY GRADED A+ ASSURED PASS
This comprehensive collection of 200 unique, non-repeating, multiple-choice
questions is specifically designed to mirror the clinical rigour and format of
the CCI Registered Cardiac Sonographer (RCS) Registry Examination. Each
question presents a distinct, real-world echocardiography scenario that tests
critical competencies across cardiac anatomy and physiology, pathology and
hemodynamics, echocardiography techniques and instrumentation, clinical
applications and imaging, and patient care and safety. The questions cover a
wide spectrum of valvular heart disease, cardiomyopathies, congenital defects,
pericardial disease, and hemodynamic calculations. Every entry includes the
correct answer and a detailed, evidence-based rationale that explains the
underlying pathophysiology, ultrasound physics, or clinical priority, making
this an effective self-assessment and high-yield learning tool for RCS exam
preparation and advanced cardiac sonography practice.
1 A patient with dyspnoea and a systolic ejection murmur that increases with the
Valsalva maneuver is being evaluated. What is the most likely diagnosis?
A) Aortic stenosis
B) Hypertrophic cardiomyopathy
C) Mitral valve prolapse
D) Pulmonary stenosis
Answer: B
Rationale: Hypertrophic cardiomyopathy (HCM) is characterised by asymmetric
septal hypertrophy and dynamic left ventricular outflow tract obstruction. The
murmur of HCM increases with Valsalva maneuver because decreased preload
increases the obstruction, whereas aortic stenosis murmurs decrease or remain
unchanged.
2 Which Doppler modality is most appropriate for assessing the severity of mitral
stenosis?
A) Continuous-wave Doppler
B) Pulsed-wave Doppler
C) Color flow Doppler
D) Tissue Doppler
,Answer: A
Rationale: Continuous-wave Doppler is used to measure the peak and mean
pressure gradients across the mitral valve in mitral stenosis. It provides accurate
high-velocity measurements necessary for severity assessment.
3 The normal ejection fraction (EF) by Simpson's biplane method is
approximately:
A) 30-40%
B) 40-50%
C) 55-70%
D) 75-85%
Answer: C
Rationale: Normal ejection fraction is typically between 55% and 70%. A value
below 50% indicates systolic dysfunction, and values above 70% may be seen in
hyperdynamic states.
4 Which of the following views is best for measuring the left ventricular outflow
tract (LVOT) diameter?
A) Apical 4-chamber view
B) Apical 3-chamber view
C) Parasternal long-axis view
D) Parasternal short-axis view
Answer: C
Rationale: The parasternal long-axis view provides the most accurate measurement
of the LVOT diameter, which is used in calculating stroke volume and assessing
aortic stenosis severity via the continuity equation.
5 A patient with severe aortic regurgitation has holodiastolic flow reversal in the
descending aorta. This finding indicates:
A) Mild aortic regurgitation
B) Moderate aortic regurgitation
C) Severe aortic regurgitation
D) Mitral stenosis
Answer: C
Rationale: Holodiastolic flow reversal in the descending aorta is a specific sign of
severe aortic regurgitation. It indicates significant volume overload and is one of
the parameters used to grade severity.
6 Which of the following is the most common cause of mitral stenosis?
A) Rheumatic fever
,B) Infective endocarditis
C) Mitral valve prolapse
D) Ischemic heart disease
Answer: A
Rationale: Rheumatic fever is the most common cause of mitral stenosis
worldwide. The rheumatic process causes thickening, fusion, and calcification of
the mitral valve leaflets and commissures, leading to obstruction.
7 A patient has a mitral valve area of 1.0 cm² by planimetry. This indicates:
A) Mild mitral stenosis
B) Moderate mitral stenosis
C) Severe mitral stenosis
D) Normal mitral valve area
Answer: C
Rationale: A mitral valve area of less than 1.5 cm² indicates severe mitral stenosis.
Normal mitral valve area is 4-6 cm². Severe stenosis is typically defined as less
than 1.0 cm².
8 Which echocardiographic view is most commonly used to assess the severity of
aortic stenosis using the continuity equation?
A) Apical 4-chamber
B) Apical 5-chamber
C) Parasternal long-axis
D) Subcostal 4-chamber
Answer: B
Rationale: The apical 5-chamber view is used to obtain the velocity-time integral
(VTI) of the LVOT and the aortic valve, which are necessary for the continuity
equation to calculate aortic valve area.
9 The normal pulmonary artery systolic pressure (PASP) by echocardiography is:
A) Less than 15 mmHg
B) Less than 25 mmHg
C) Less than 35 mmHg
D) Less than 45 mmHg
Answer: C
Rationale: Normal pulmonary artery systolic pressure is typically less than 35
mmHg. PASP is estimated by measuring the tricuspid regurgitation velocity and
adding right atrial pressure.
10 Which of the following is the most common cause of pericardial effusion?
, A) Idiopathic
B) Malignancy
C) Uremia
D) Tuberculosis
Answer: A
Rationale: Idiopathic pericardial effusion is the most common cause, often
following viral infections. Other causes include malignancy, uremia, and
tuberculosis, but idiopathic remains most frequent.
11 A patient has a dilated left ventricle with a septal wall thickness of 2.0 cm. This
finding is most consistent with:
A) Hypertrophic cardiomyopathy
B) Dilated cardiomyopathy
C) Amyloidosis
D) Aortic stenosis
Answer: A
Rationale: A septal wall thickness greater than 1.5 cm is consistent with
hypertrophic cardiomyopathy. The asymmetric septal hypertrophy is a hallmark of
HCM, with a septal-to-posterior wall thickness ratio of >1.3.
12 Which of the following Doppler findings is most specific for aortic
regurgitation?
A) Continuous-wave Doppler envelope with a deceleration slope
B) Holodiastolic flow reversal in the descending aorta
C) Aortic valve area of 2.0 cm²
D) Mean gradient of 10 mmHg
Answer: B
Rationale: Holodiastolic flow reversal in the descending aorta is a specific sign of
aortic regurgitation. It indicates that the regurgitant flow is significant enough to
cause diastolic flow reversal in the descending aorta.
13 The left atrial volume index (LAVI) is a marker of:
A) Right ventricular function
B) Diastolic dysfunction
C) Left ventricular systolic function
D) Pulmonary hypertension
Answer: B
Rationale: Left atrial volume index (LAVI) is a marker of diastolic dysfunction
and left ventricular filling pressure. An elevated LAVI (>34 mL/m²) indicates
QUESTIONS AND CORRECT ANSWERS WITH RATIONALE
LATEST 2026 ALREADY GRADED A+ ASSURED PASS
This comprehensive collection of 200 unique, non-repeating, multiple-choice
questions is specifically designed to mirror the clinical rigour and format of
the CCI Registered Cardiac Sonographer (RCS) Registry Examination. Each
question presents a distinct, real-world echocardiography scenario that tests
critical competencies across cardiac anatomy and physiology, pathology and
hemodynamics, echocardiography techniques and instrumentation, clinical
applications and imaging, and patient care and safety. The questions cover a
wide spectrum of valvular heart disease, cardiomyopathies, congenital defects,
pericardial disease, and hemodynamic calculations. Every entry includes the
correct answer and a detailed, evidence-based rationale that explains the
underlying pathophysiology, ultrasound physics, or clinical priority, making
this an effective self-assessment and high-yield learning tool for RCS exam
preparation and advanced cardiac sonography practice.
1 A patient with dyspnoea and a systolic ejection murmur that increases with the
Valsalva maneuver is being evaluated. What is the most likely diagnosis?
A) Aortic stenosis
B) Hypertrophic cardiomyopathy
C) Mitral valve prolapse
D) Pulmonary stenosis
Answer: B
Rationale: Hypertrophic cardiomyopathy (HCM) is characterised by asymmetric
septal hypertrophy and dynamic left ventricular outflow tract obstruction. The
murmur of HCM increases with Valsalva maneuver because decreased preload
increases the obstruction, whereas aortic stenosis murmurs decrease or remain
unchanged.
2 Which Doppler modality is most appropriate for assessing the severity of mitral
stenosis?
A) Continuous-wave Doppler
B) Pulsed-wave Doppler
C) Color flow Doppler
D) Tissue Doppler
,Answer: A
Rationale: Continuous-wave Doppler is used to measure the peak and mean
pressure gradients across the mitral valve in mitral stenosis. It provides accurate
high-velocity measurements necessary for severity assessment.
3 The normal ejection fraction (EF) by Simpson's biplane method is
approximately:
A) 30-40%
B) 40-50%
C) 55-70%
D) 75-85%
Answer: C
Rationale: Normal ejection fraction is typically between 55% and 70%. A value
below 50% indicates systolic dysfunction, and values above 70% may be seen in
hyperdynamic states.
4 Which of the following views is best for measuring the left ventricular outflow
tract (LVOT) diameter?
A) Apical 4-chamber view
B) Apical 3-chamber view
C) Parasternal long-axis view
D) Parasternal short-axis view
Answer: C
Rationale: The parasternal long-axis view provides the most accurate measurement
of the LVOT diameter, which is used in calculating stroke volume and assessing
aortic stenosis severity via the continuity equation.
5 A patient with severe aortic regurgitation has holodiastolic flow reversal in the
descending aorta. This finding indicates:
A) Mild aortic regurgitation
B) Moderate aortic regurgitation
C) Severe aortic regurgitation
D) Mitral stenosis
Answer: C
Rationale: Holodiastolic flow reversal in the descending aorta is a specific sign of
severe aortic regurgitation. It indicates significant volume overload and is one of
the parameters used to grade severity.
6 Which of the following is the most common cause of mitral stenosis?
A) Rheumatic fever
,B) Infective endocarditis
C) Mitral valve prolapse
D) Ischemic heart disease
Answer: A
Rationale: Rheumatic fever is the most common cause of mitral stenosis
worldwide. The rheumatic process causes thickening, fusion, and calcification of
the mitral valve leaflets and commissures, leading to obstruction.
7 A patient has a mitral valve area of 1.0 cm² by planimetry. This indicates:
A) Mild mitral stenosis
B) Moderate mitral stenosis
C) Severe mitral stenosis
D) Normal mitral valve area
Answer: C
Rationale: A mitral valve area of less than 1.5 cm² indicates severe mitral stenosis.
Normal mitral valve area is 4-6 cm². Severe stenosis is typically defined as less
than 1.0 cm².
8 Which echocardiographic view is most commonly used to assess the severity of
aortic stenosis using the continuity equation?
A) Apical 4-chamber
B) Apical 5-chamber
C) Parasternal long-axis
D) Subcostal 4-chamber
Answer: B
Rationale: The apical 5-chamber view is used to obtain the velocity-time integral
(VTI) of the LVOT and the aortic valve, which are necessary for the continuity
equation to calculate aortic valve area.
9 The normal pulmonary artery systolic pressure (PASP) by echocardiography is:
A) Less than 15 mmHg
B) Less than 25 mmHg
C) Less than 35 mmHg
D) Less than 45 mmHg
Answer: C
Rationale: Normal pulmonary artery systolic pressure is typically less than 35
mmHg. PASP is estimated by measuring the tricuspid regurgitation velocity and
adding right atrial pressure.
10 Which of the following is the most common cause of pericardial effusion?
, A) Idiopathic
B) Malignancy
C) Uremia
D) Tuberculosis
Answer: A
Rationale: Idiopathic pericardial effusion is the most common cause, often
following viral infections. Other causes include malignancy, uremia, and
tuberculosis, but idiopathic remains most frequent.
11 A patient has a dilated left ventricle with a septal wall thickness of 2.0 cm. This
finding is most consistent with:
A) Hypertrophic cardiomyopathy
B) Dilated cardiomyopathy
C) Amyloidosis
D) Aortic stenosis
Answer: A
Rationale: A septal wall thickness greater than 1.5 cm is consistent with
hypertrophic cardiomyopathy. The asymmetric septal hypertrophy is a hallmark of
HCM, with a septal-to-posterior wall thickness ratio of >1.3.
12 Which of the following Doppler findings is most specific for aortic
regurgitation?
A) Continuous-wave Doppler envelope with a deceleration slope
B) Holodiastolic flow reversal in the descending aorta
C) Aortic valve area of 2.0 cm²
D) Mean gradient of 10 mmHg
Answer: B
Rationale: Holodiastolic flow reversal in the descending aorta is a specific sign of
aortic regurgitation. It indicates that the regurgitant flow is significant enough to
cause diastolic flow reversal in the descending aorta.
13 The left atrial volume index (LAVI) is a marker of:
A) Right ventricular function
B) Diastolic dysfunction
C) Left ventricular systolic function
D) Pulmonary hypertension
Answer: B
Rationale: Left atrial volume index (LAVI) is a marker of diastolic dysfunction
and left ventricular filling pressure. An elevated LAVI (>34 mL/m²) indicates
