ECG's

Question 1

ECG changes of pericarditis

Answer 1

Diffuse STE concave up, PR depression except aVR: ST decrease and PR increase, TWI at stage 3 after ST PR normalized
Large effusion show low voltages, electrical alternans

Question 2

Blunted y descend

Answer 2

Pericardial tamponade

Question 3

Pulmonary HTN

Answer 3

• Right axis deviation (>+90)
• R V1 >7 mm
• R V1 + S V5 or V6 >10 mm
• R/S ratio in V1 >1
• S/R ratio in V6 >1
• Late intrinsicoid deflection in V1
• Incomplete right bundle branch block
• ST-T wave abnormalities (“strain”) in inferior leads
• Right atrial hypertrophy (P pulmonale)
• S1S2S3 pattern (particularly in children)