ECG Findings

Question 1

A 26-year-old woman presents acutely unwell with shortness of breath. Her ECG
shows sinus tachycardia, deep S waves in I, inverted T waves in III and Q waves in III.

Answer 1

Pulmonary embolus

Question 2

Dominant R in V1, inverted T waves in V1–V3, deep wide S waves in V6.

Answer 2

Right bundle branch block

Question 3

Prolonged P–R interval, depressed ST, flattened T waves, prominent U waves.

Answer 3

Hypokalaemia

Question 4

Sinus rhythm, bifid ‘p’ waves best seen in II, V3 and V4.

Answer 4

Mitral stenosis

Question 5

A 65-year-old man presents with chest pain radiating to the jaw. The ECG shows
ST segment elevation in II, III and aVF, with T-wave inversion in V5 and V6.

Answer 5

Inferior MI

Question 6

ECG of a 55 year old being treated for hypertension shows tall tented T waves

Answer 6

Hyperkalaemia

Question 7

A 34-year-old man presents to A&E after a road traffic accident. The ECG shows
pulseless electrical activity.

Answer 7

Cardiac tamponade

Question 8

An 85-year-old man with pneumonia complains of palpitations. ECG shows
absent P waves

Answer 8

Atrial fibrillation

Question 9

ECG of a 45-year-old man with sarcoidosis shows an ‘M’ pattern V5 and inverted
T waves in I, aVL and V5–V6.

Answer 9

Left bundle branch block

Question 10

ECG of an 8-year-old girl shows normal P waves and QRS complexes but shows
T-wave inversion in V1.

Answer 10

Normal ECG

Question 11

What anatomically do the following leads show on ECG?
V1&2
V3&4
V5&6

Answer 11

V1&2 - right side of heart
V3&4 - septum
V5&6 - left side of heart

Question 12

What is the rough length of the parts of an ECG?

Answer 12

P wave - atrial depolarization - 0.08-0.1 sec

QRS complex - ventricular depolarization -