Cardiovascular Radiology Practice Questions

Q: Which of the following conditions is the MOST COMMON cause of rib notching?

Coarctation of aorta. ***Coarctation of aorta*** - **Coarctation of the aorta** is the classic and **most common cause** of rib notching. - The notching is caused by the enlargement and tortuosity of the **intercostal arteries** as they provide collateral circulation to bypass the narrowed aorta. *Chronic superior venacava obstruction* - Chronic superior vena cava (SVC) obstruction may lead to the development of collateral circulation through the azygos and hemiazygos veins, but it does **not typically cause rib notching**. - Rib notching is specifically related to collateral flow bypassing an aortic obstruction, not a venous obstruction. *Atrial septal defect* - An **atrial septal defect (ASD)** is a communication between the atria that can lead to right heart volume overload and pulmonary hypertension. - While it's a congenital heart defect, an ASD does **not cause rib notching** as it does not involve an obstruction of systemic arterial flow requiring collateral circulation via the intercostal arteries. *Congenital interruption of aorta* - While **congenital interruption of the aorta** also involves an aortic obstruction, it is a **much rarer condition** than coarctation of the aorta. - Due to its rarity, it is not considered the most common cause of rib notching, even though it would theoretically lead to similar collateral vessel formation.

Q: The most accurate investigation for assessing ventricular function is:

MRI. ***MRI*** - Cardiac MRI is considered the **gold standard** for assessing ventricular function, providing highly accurate and reproducible measurements of **ventricular volumes**, **ejection fraction**, and **myocardial mass**. - It offers excellent tissue characterization, allowing for direct visualization of **fibrosis**, **inflammation**, and other myocardial pathologies that can affect function. *Multislice CT* - While useful for assessing cardiac anatomy, particularly **coronary arteries**, Multislice CT involves **ionizing radiation** and has limitations in accurately assessing subtle changes in myocardial function compared to MRI. - Its strength lies more in **anatomical evaluation** (e.g., calcium scoring, coronary angiography) rather than detailed functional assessment. *Echocardiography* - Echocardiography is a widely available and useful first-line imaging modality for ventricular function, but it can be limited by **acoustic windows**, **operator dependency**, and **spatial resolution** compared to MRI. - While it provides good estimates of ejection fraction, particularly in simple cases, its 3D capabilities and tissue characterization are generally inferior to MRI. *Nuclear scan* - Nuclear scans (e.g., MUGA scans, SPECT) can assess ventricular function and myocardial perfusion, but they involve **ionizing radiation** and primarily provide **functional information** based on tracer uptake, not detailed structural or tissue characterization. - They are often used for evaluating **perfusion defects** and overall ejection fraction, but are less precise for detailed chamber quantification and tissue characterization than MRI.

Q: The procedure of choice for the evaluation of aortic aneurysms is -

Computed tomography. ***Computed tomography*** - **Computed tomography (CT)** offers excellent spatial resolution and is the gold standard for diagnosing, staging, and pre-operative planning for aortic aneurysms. - It precisely measures aneurysm size, detects mural thrombus, assesses rupture risk, and evaluates the extent of involvement with surrounding structures. *Ultrasonography* - While useful for initial screening and serial monitoring of known abdominal aortic aneurysms due to its non-invasiveness and cost-effectiveness, its accuracy can be limited by **patient body habitus** and **bowel gas**. - It may not reliably visualize the entire aorta or accurately assess complex anatomy and rupture. *Magnetic resonance imaging* - **Magnetic resonance imaging (MRI)** provides detailed anatomical information and avoids radiation exposure, but it is typically more expensive and time-consuming than CT. - It is often reserved for patients with **renal insufficiency** where iodinated contrast is a concern or when evaluating specific tissue characteristics not well seen on CT. *Arteriography* - **Arteriography** (angiography) is an invasive procedure involving direct contrast injection, carrying risks such as arterial injury and nephrotoxicity. - While it can visualize the aortic lumen, it primarily shows the patent lumen and may **underestimate the true aneurysm size** due to mural thrombus. It is typically used for intervention planning or specific contexts rather than initial diagnosis.

Q: Which chamber enlargement shows a double right heart border with a wide subcarinal angle?

Left atrium. ***Left atrium*** - A **double right heart border** on a chest X-ray is a classic sign of **left atrial enlargement**, as the enlarged left atrium bulges into the right atrial silhouette. - The **wide subcarinal angle** (angle between the mainstem bronchi) also indicates left atrial enlargement, as the expanding left atrium pushes the bronchi apart. *Left ventricle* - **Left ventricular enlargement** primarily manifests as a **downward and leftward displacement of the apex** and increased cardiac silhouette on the left. - It does not typically cause a double right heart border or widening of the subcarinal angle. *Right atrium* - **Right atrial enlargement** usually presents as a **prominent right heart border** that extends further to the right than normal. - It does not result in a double right heart border or affect the subcarinal angle. *Right ventricle* - **Right ventricular enlargement** leads to an **anterior bowing of the sternum** (in severe cases) and an upward and leftward displacement of the cardiac apex. - It pushes the left ventricle posteriorly and does not produce a double right heart border or a wide subcarinal angle.

Q: Inferior rib notching is seen in which of the following conditions?

Coarctation of the aorta. ***Coarctation of the aorta*** - **Inferior rib notching** is a classic radiographic sign caused by the **enlarged, tortuous intercostal arteries** eroding the inferior margins of the ribs. - This collateral circulation develops to bypass the narrowed aortic segment, increasing blood flow through the intercostal arteries. *Rickets* - Rickets can cause **bowing of long bones**, widened epiphyseal plates, and a **rachitic rosary** (enlargement of costochondral junctions). - It does not typically lead to rib notching; rather, it affects bone mineralization and growth patterns. *ASD* - An **atrial septal defect (ASD)** is a congenital heart defect causing a left-to-right shunt, leading to pulmonary overload and right heart enlargement. - While it can manifest with cardiomegaly and increased pulmonary vascular markings, it does not cause rib notching. *Multiple myeloma* - Multiple myeloma is a plasma cell malignancy that causes **punched-out lytic lesions** in bones, leading to bone pain and pathological fractures. - While it affects bone, the lesions are typically osteolytic and diffuse, not specifically causing inferior rib notching.

Q: Egg on side appearance is seen in what condition?

Transposition of great vessels. **Transposition of great vessels** - The "egg on side" or **egg-on-a-string** appearance is a classic radiographic sign of **transposition of the great vessels (TGV)**, where the heart appears ovoid and lying on its side. - This appearance is due to the **narrow mediastinum** as the great arteries (aorta and pulmonary artery) run parallel to each other. *Fallot's tetralogy* - The classic chest X-ray finding in Fallot's tetralogy is a **boot-shaped heart** (coeur en sabot), due to right ventricular hypertrophy and pulmonary artery hypoplasia. - The mediastinum is usually not narrowed, and the great arteries do not exhibit the same parallel arrangement. *Ebstein's anomaly* - Ebstein's anomaly typically shows marked **cardiomegaly** on chest X-ray due to right atrial enlargement and tricuspid regurgitation. - It does not produce the "egg on side" appearance; the heart size is usually significantly increased and not ovoid. *Ventricular septal defect* - A **ventricular septal defect (VSD)** often presents with **cardiomegaly** and **pulmonary plethora** (increased pulmonary vascular markings) due to left-to-right shunting. - The heart shape is not typically described as "egg on side" and the great arteries are not transposed.

Q: Investigation of choice for dysphagia lusoria is what?

CT angiography. ***CT angiography*** - **CT angiography** is the investigation of choice for **dysphagia lusoria** as it precisely visualizes the **aberrant subclavian artery** compressing the esophagus. - It provides detailed anatomical information about the aorta and its branches, confirming the vascular ring anomaly. *Barium swallow study* - A **barium swallow** can suggest dysphagia lusoria by showing an **indentation** on the posterior aspect of the esophagus, but it doesn't definitively identify the compressing vessel. - While helpful for initial evaluation of dysphagia, a barium swallow lacks the specificity to characterize the vascular anomaly. *Chest X-ray* - A **chest X-ray** is unlikely to identify dysphagia lusoria directly, although it might rarely show a widened mediastinum or an abnormal aortic knob. - It provides insufficient detail to visualize the aberrant subclavian artery or its relationship to the esophagus. *Esophageal motility study* - An **esophageal motility study** evaluates the function of the esophageal muscles and sphincters and would be normal in dysphagia lusoria. - This study is useful for conditions like achalasia or esophageal spasm, which are not the cause of dysphagia in this case.

Q: Dysphagia lusoria is diagnosed by what?

CT Angiography. ***CT Angiography*** - **CT angiography** is the gold standard for diagnosing dysphagia lusoria. - It clearly visualizes the **aberrant right subclavian artery** compressing the esophagus, which is the underlying cause of the condition. *USG* - **Ultrasound** is not suitable for diagnosing dysphagia lusoria. - It has limited ability to visualize the **deep thoracic structures** and arterial anomalies causing esophageal compression. *Fluoroscopy* - While it can show **esophageal compression** during a barium swallow, it doesn't clearly delineate the vascular anomaly. - It is often used as a **screening tool** but not for definitive diagnosis of the aberrant vessel. *Plain radiograph* - A **plain radiograph** offers very limited information for diagnosing dysphagia lusoria. - It cannot visualize the **aberrant vasculature** or the specific compression of the esophagus.

Q: Inferior rib notching is seen in which condition?

Coarctation of aorta. ***Coarctation of aorta*** - In **aortic coarctation**, the **increased collateral circulation** through the intercostal arteries causes them to become engorged and pulsatile, leading to erosion on the undersurfaces of the ribs. - This characteristic radiological finding, known as **inferior rib notching**, typically becomes evident after the first year of life. *Marfan's syndrome* - Marfan's syndrome is a **connective tissue disorder** associated with cardiovascular abnormalities such as **aortic root dilatation** and dissection but does not directly cause rib notching. - Skeletal manifestations include **pectus excavatum** or carinatum and long, slender limbs, not rib erosion. *Rickets* - Rickets is a bone-softening disease in children due to **vitamin D deficiency**, leading to skeletal deformities like **bowed legs** and rachitic rosary. - It does not cause bone erosion or notching of the ribs; instead, it affects growth plates and bone mineralization. *SLE* - **Systemic lupus erythematosus (SLE)** is a systemic autoimmune disease that can affect multiple organ systems, including joints, skin, kidneys, and lungs. - While SLE can cause serositis or arthritis, it is not associated with **inferior rib notching** as a primary manifestation.

Question 1

Which of the following conditions is the MOST COMMON cause of rib notching?

Accepted Answer

Coarctation of aorta

Answer

Atrial septal defect

Answer

Chronic superior venacava obstruction

Answer

Congenital interruption of aorta

Question 2

The most accurate investigation for assessing ventricular function is:

Accepted Answer

MRI

Answer

Multislice CT

Answer

Echocardiography

Answer

Nuclear scan

Question 3

The procedure of choice for the evaluation of aortic aneurysms is -

Accepted Answer

Computed tomography

Answer

Magnetic resonance imaging

Answer

Arteriography

Answer

Ultrasonography

Question 4

Which chamber enlargement shows a double right heart border with a wide subcarinal angle?

Accepted Answer

Left atrium

Answer

Left ventricle

Answer

Right atrium

Answer

Right ventricle

Question 5

Inferior rib notching is seen in which of the following conditions?

Accepted Answer

Coarctation of the aorta

Answer

Rickets

Answer

ASD

Answer

Multiple myeloma

Question 6

Egg on side appearance is seen in what condition?

Accepted Answer

Transposition of great vessels

Answer

Fallot's tetralogy

Answer

Ebstein's anomaly

Answer

Ventricular septal defect

Question 7

Investigation of choice for dysphagia lusoria is what?

Accepted Answer

CT angiography

Answer

Barium swallow study

Answer

Chest X-ray

Answer

Esophageal motility study

Question 8

What is the main advantage of transesophageal echocardiography (TEE)?

Accepted Answer

Superior imaging of cardiac structures for thrombus detection.

Answer

Lung tumors can be diagnosed with TEE.

Answer

TEE can guide ECG procedures.

Answer

TEE is useful for lung biopsy procedures.

Question 9

Dysphagia lusoria is diagnosed by what?

Accepted Answer

CT Angiography

Answer

USG

Answer

Fluoroscopy

Answer

Plain radiograph

Question 10

Inferior rib notching is seen in which condition?

Accepted Answer

Coarctation of aorta

Answer

Marfan's syndrome

Answer

Rickets

Answer

SLE

Cardiovascular Radiology — MCQs

Cardiovascular Radiology — MCQs

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