Pathological ECGs

Question 1

What do tall tented T waves and widened QRS complexes indicate?

Answer 1

Hyperkalaemia

Question 2

What do small T waves and prominant U waves indicate

Answer 2

Hypokalaemia

Question 3

What does a short QT interval indicate?

Answer 3

Hypercalcaemia

Question 4

What do long QT intervals with small T waves indicate?

Answer 4

Hypocalcaemia

Question 5

• Large S wave in lead I
• Deep Q wave in lead III
• Inverted T wave in lead III

Answer 5

Pumonary embolism

Question 6

• Sinus rhythm
• Q waves in leads III and AvF
• Depressed (ischaemic) ST segments in leads AvL and V6

Answer 6

Inferior infarction

Question 7

• Sinus rhythm
• Q waves in leads I, II, AvL, V3, V4, V5
• Raised ST segments in leads V2 - V6

Answer 7

Anterolateral infarction

Question 8

• Sinus rhythm
• Q waves in leads V2 - V4
• Inverted T waves in leads V4 - V6

Answer 8

Anterior infarction

Question 9

Negative QRS deflections in II and III

Answer 9

Left axis deviation

Question 10

Negative QRS deflections in I

Answer 10

Right axis deviation

Question 11

3 stages of an acute MI?

Answer 11

• T wave peaking followed by T wave inversion
• ST segment elevation
• Appearence of new Q waves

Question 12

Negative QRS deflections in II and III

Answer 12

Left axis deviation

Question 13

• R wave in V5 (>25mm)

- or sum of the S wave in V1 and R wave in V5 or V6 >35mm

Answer 13

Left ventricular hypertrophy

Question 14

• Dominant R wave in V1
• T wave inversion in V1 - V3 or V4
• Deep S wave in V6

Answer 14

Right Ventricular hypertrophy

Question 15

Peaked P waves

Answer 15

Right atrial hypertrophy (P-Pulmonale)

Question 16

Bifid P waves

Answer 16

Left atrial hypertrophy (P-Mitrale)

Question 17

• Normal QRS complexes
• Tachycardia
• Absent P waves

Answer 17

Junctional (nodal) tachycardia