EchoDx Hub

11/06/2026

11/06/2026

MAPSE is a simple M-mode measurement of mitral annular motion and serves as a reliable marker of LV longitudinal systolic function.

11/06/2026

EchoDx Hub | Hospital Practice MCQ

Q. Which principle of hospital practice directly minimizes cross-contamination when the same healthcare worker attends multiple patients sequentially?**

A. Selective use of personal protective equipment only for isolation cases
B. Standard precautions applied uniformly irrespective of diagnosis
C. Terminal cleaning performed at the end of duty hours
D. Routine antibiotic prophylaxis for admitted patients
✅ **Correct Answer: B. Standard precautions applied uniformly irrespective of diagnosis**

📖 **Explanation:**
**Standard precautions** are the foundation of infection prevention and control in healthcare settings. They are applied to **all patients, regardless of suspected or confirmed infection status**.

🔹 Key components include:
• Hand hygiene before and after patient contact
• Appropriate use of PPE
• Safe injection practices
• Respiratory hygiene/cough etiquette
• Proper handling of contaminated equipment

🔹 Other options:
• Selective PPE use only for isolation cases → ❌ insufficient to prevent cross-contamination
• Terminal cleaning at end of duty hours → ❌ important but does not directly prevent transmission between sequential patient contacts
• Routine antibiotic prophylaxis → ❌ does not prevent cross-contamination and may promote resistance

👉 **Key Concept:**
**Hand hygiene and standard precautions for every patient encounter are the most effective measures to prevent cross-contamination.**

11/06/2026

🫀 ASD vs Normal Heart on Echocardiography

✅ NORMAL HEART

🔹 Subcostal View
• Interatrial septum intact
• No color flow across the septum

🔹 Apical 4-Chamber View
• Normal RA and RV size
• No shunt seen

🔹 PSAX (Aortic Level)
• Intact atrial septum
• No abnormal flow

⚠️ ATRIAL SEPTAL DEFECT (ASD)

🔹 Subcostal View
• Defect in the interatrial septum
• Left-to-right shunt on Color Doppler

🔹 Apical 4-Chamber View
• Enlarged RA and RV
• Color flow crossing the septum

🔹 PSAX (Aortic Level)
• ASD visible near the fossa ovalis
• Color Doppler demonstrates shunting

📌 Key Echo Signs of ASD
✔ Interatrial septal defect
✔ Left-to-right shunt
✔ RA enlargement
✔ RV enlargement
✔ Best visualized in the Subcostal View

🫀 Normal Heart = Intact Septum
🫀 ASD = Septal Defect + Shunt + Right Heart Dilatation

10/06/2026

EPSS is one of the simplest M-mode measurements for estimating LV systolic function. An EPSS >7 mm should raise suspicion of reduced ejection fraction.

10/06/2026

🫀 **EchoDx Hub | ECG MCQ #**

**Q. Which description best represents a normal ST segment on ECG?**

A. Markedly sloping upward before the T wave
B. Slightly elevated above baseline in all leads
C. Isoelectric line continuous with the end of the QRS complex
D. Consistently depressed below baseline

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✅ **Correct Answer: C. Isoelectric line continuous with the end of the QRS complex**

📖 **Explanation:**
The **ST segment** represents the period between **ventricular depolarization and repolarization**. In a normal ECG, it is typically **isoelectric (flat)** and lies on the baseline, beginning at the **J point** and ending at the start of the **T wave**.

🔹 Normal ST segment:
• Flat or nearly flat (isoelectric)
• Continuous with the end of the QRS complex
• No significant elevation or depression

🔹 Other options:
• Markedly sloping upward → ❌ may indicate abnormal repolarization
• Elevated above baseline in all leads → ❌ abnormal finding
• Consistently depressed below baseline → ❌ suggests ischemia or other pathology

👉 **Key Concept:**
A normal ST segment is **isoelectric and aligned with the baseline**, serving as an important reference for detecting ischemia and infarction.

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10/06/2026

🫀 Normal Mitral Valve vs Rheumatic Mitral Valve (CRHD)

🔍 Key Echo Findings:

✅ Normal MV
• Thin, mobile leaflets
• Wide diastolic opening
• Normal EF slope on M-mode
• Low transmitral gradient

⚠️ Rheumatic MV
• Thickened leaflets with restricted mobility
• Anterior leaflet doming ("hockey-stick" appearance)
• Commissural fusion ("fish-mouth" valve)
• Reduced EF slope on M-mode
• Increased transmitral velocities and gradients

📚 Classic echocardiographic features of rheumatic mitral stenosis help differentiate it from a normal mitral valve.