Primary Cardiac Issues Found

1. 🔴 Moderate-size Perimembranous VSD (Partly Restricted, L→R)

• What it is: A hole in the ventricular septum located just below the aortic valve (perimembranous position). "Partly restricted" means the defect is not fully closed, and blood is still shunting from the Left ventricle → Right ventricle (left-to-right shunt).
• Significance: This is the main diagnosis and the reason for follow-up. The VSD gradient = 49 mmHg (measured by Doppler), which confirms it is restrictive but still hemodynamically relevant. A moderate VSD causes volume overload on the left heart and can progress to pulmonary hypertension if untreated.
• Risk specific to perimembranous location: Close to the aortic valve and conduction system — risk of aortic valve prolapse (specifically RCC, which is documented here as absent) and heart block.

2. 🟡 RVOT Muscle Bundles (Right Ventricular Outflow Tract Obstruction)

• What it is: Abnormal muscle bundles within the right ventricular outflow tract. These are often seen in association with perimembranous VSDs.
• Significance: These bundles can progressively obstruct right ventricular outflow over time, potentially converting the hemodynamics toward right-to-left shunting (Fallot physiology). Requires monitoring for progression.

3. 🟡 Mild Tricuspid Regurgitation (Mild TR)

• What it is: Mild backflow through the tricuspid valve.
• Significance: Often secondary to right heart volume/pressure overload from the VSD shunt. Mild TR is common and usually well-tolerated, but indicates the right heart is under some stress.

4. 🟡 Mild Mitral Regurgitation (Mild MR)

• What it is: Mild backflow through the mitral valve.
• Significance: Likely secondary to left ventricular volume overload from the left-to-right shunt across the VSD. Mild at this stage.

5. 🟡 Dominant LV

• What it is: The left ventricle is dominant, meaning it is carrying a larger volume load than normal.
• Significance: This is expected with a left-to-right VSD shunt — the left ventricle receives both normal pulmonary venous return plus the recirculated shunted blood. Persistent LV dominance/dilation can impair LV function over time.

Reassuring Findings (No Additional Problems)

Summary

Echo Issues – Miss Anwal (3.5F)

1. Moderate perimembranous VSD – hole between the ventricles, blood shunting left→right (gradient 49 mmHg). The main problem.
2. RVOT muscle bundles – abnormal muscle in the right ventricular outflow tract; can worsen over time and obstruct blood flow to the lungs.
3. Mild TR & Mild MR – minor leakage in tricuspid and mitral valves, secondary to the VSD.
4. Dominant LV – left ventricle is volume-overloaded due to the shunt.

Everything else (heart connections, function, aorta, valves) is normal. This is a follow-up echo — child is under monitoring for possible intervention.