ECG

Question 1

Acute Pericarditis

Answer 1

1. Sinus tachycardia
2. Spodick sign- downsloping TP segment in leads II and lateral precordial leads
3. Widespread concave STE and PR depression
4. Reciprocal ST depression and PR elevation in V1 and avR

Question 2

Hypokalemia

Answer 2

1. Increased P wave amplitude
2. Prolongation of PR interval
3. Widespread ST depression and T wave flattening/inversion
4. Prominent U waves (best seen in V2-V3)
5. Apparent long QT interval due to fusion of T and U waves (long QU interval)

Question 3

Right bundle branch block

Answer 3

1. QRS duration >120ms
2. RsR’ pattern in V1-3
3. Wide, slurred S wave in lateral leads

Question 4

Mobitz II block (Hay block)

Answer 4

Intermittent non conducted P waves without progressive prolongation of PR interval

• PR interval in conducted beats remains constant
• P waves march through at a constant rate
• RR interval surrounding the dropped beat is an exact multiple of the preceding RR interval