ECG

Question 1

Inferior leads

Answer 1

II,III,avF
rIGHT Coronary

Right coronary artery

Question 2

Lateral leads

Answer 2

I,avL,V5,V6
Left Circumflex

circumflex

Question 3

Anterior leads

Answer 3

V3,V4

LAD

LAD

Question 4

Septal leads

Answer 4

V1,V2
LAD

LAD

Question 5

Posterior leads

Answer 5

Changes in V1-3
Posterior infarction is confirmed by ST elevation and Q waves in posterior leads (V7-9)
Usually left circumflex, also right coronary

Question 6

causes of j wave

Answer 6

hypercalcemia
hypothermia
intracranial bleed

Question 7

ECG hyperkalaemia

Answer 7

Peaked or 'tall-tented' T waves (occurs first)
Loss of P waves
Broad QRS complexes
Sinusoidal wave pattern
Ventricular fibrillation

Question 8

ECG hypokalaemia

Answer 8

inverted T waves and U waves
muscle weakness and hypotonia and sometimes can include chest pain and palpitation

Question 9

ECG hypercalcaemia

Answer 9

shortened QT interval
J ( osborne) waves

Question 10

Digoxin effects on ECG

Answer 10

Downsloping ST depression
T-wave changes (inversion)
Biphasic/flattened and shortened QT interval
Slight PR interval prolongation
Prominent U-waves

Question 11

ECG pericarditis

Answer 11

PR depression
saddle-shaped ST-segment elevation

Question 12

causes of prolonged QT include

Answer 12

hypocalcaemia
hypokalaemia
hypomagnesaemia
hypothermia
drugs (e.g. antipsychotics, tricyclic antidepressants, macrolides, antiarrhythmics)