Cardiology

Radiographic Pathology Overview

  • Presented by Dr. Manal Almahbashi, Radiologist.

Key Concepts in Congenital Heart Disease

Classification of Congenital Heart Disease

  • Acyanotic Congenital Heart Disease: These conditions usually lead to increased pulmonary blood flow without cyanosis.

    • Examples include:

    • Ventricular Septal Defect (VSD)

    • Atrial Septal Defect (ASD)

    • Patent Ductus Arteriosus (PDA)

    • Atrioventricular Septal Defect (AVSD)

  • Cyanotic Congenital Heart Disease: These conditions usually lead to decreased oxygen saturation and cyanosis.

    • Examples include:

    • Tetralogy of Fallot (TOF)

    • Transposition of Great Arteries (TGA)

Detailed Conditions
1. Ventricular Septal Defect (VSD)

  • Description: A hole in the interventricular septum allowing communication between right and left ventricles.

  • Radiographic Features:

    • Normal chest radiograph with small VSD.

    • Larger VSD may show:

    • Cardiomegaly (especially left atrium enlargement)

    • Pulmonary arterial hypertension

    • Increased pulmonary vascular markings.

2. Atrial Septal Defect (ASD)

  • Description: Abnormal opening in the atrial septum affecting blood flow between the right and left atria.

  • Radiographic Features:

    • May be normal in early stages.

    • Signs of increased pulmonary flow include enlarged pulmonary vessels and eventual enlargement of right atrium and ventricle.

3. Patent Ductus Arteriosus (PDA)

  • Description: Persistence of the ductus arteriosus connection.

  • Radiographic Features:

    • May present with cardiomegaly and signs of pulmonary edema.

    • CT can visualize the ductus with various classifications.

4. Aortic Coarctation

  • Description: Narrowing of the aorta.

  • Radiographic Features:

    • Classic figure of 3 sign observed in chest radiographs.

    • Inferior rib notching (Roesler sign) on imaging.

Cyanotic Heart Conditions
1. Transposition of Great Arteries (TGA)

  • Description: Ventriculoarterial discordance, with aorta from right ventricle and pulmonary trunk from left.

  • Radiographic Features:

    • Frontal chest radiograph shows cardiomegaly and egg-on-string appearance.

    • CT visualization of abnormal vessel anatomy.

2. Tetralogy of Fallot (TOF)

  • Description: Characterized by VSD, right ventricular outflow obstruction, overriding aorta, and right ventricular hypertrophy.

  • Radiographic Features:

    • Boot-shaped heart appearance on chest radiographs.

    • Decreased pulmonary vascularity evident.

Congestive Cardiac Failure (CCF)

  • Definition: Clinical syndrome resulting from heart dysfunction leading to decreased quality and quantity of life.

  • Clinical Presentation:

    • Left-sided symptoms include:

    • Fatigue, dyspnea, chest pain.

    • Right-sided symptoms include:

    • Edema, ascites, jugular venous distension.

  • Radiographic Features:

    • Pulmonary edema observed as the disease progresses.

  • Treatment:

    • Lifestyle changes, medical treatments, potentially surgery.

Degenerative Valvular Heart Diseases

General Overview

  • Affects one or more cardiac valves, with common types including:

    • Aortic Stenosis/Regurgitation

    • Mitral Stenosis/Regurgitation

Mitral Valve Stenosis

  • Description: Narrowing of the mitral valve opening, commonly due to rheumatic heart disease.

  • Radiographic Features:

    • Left atrial enlargement

    • Double density sign and pulmonary vascular changes.

Thoracic Aortic Aneurysm

  • Definition: Weakened area in the thoracic aorta.

  • Clinical Presentation: Often asymptomatic; may present with mass effect or complications like rupture.

  • Radiographic Features:

    • Aneurysms visible as dilatations on X-ray and CT.

  • Treatment: Conservative management for small aneurysms; surgical repair for larger sizes (>5-6 cm).