Pathological ECGs Flashcards
What do tall tented T waves and widened QRS complexes indicate?
Hyperkalaemia
What do small T waves and prominant U waves indicate
Hypokalaemia
What does a short QT interval indicate?
Hypercalcaemia
What do long QT intervals with small T waves indicate?
Hypocalcaemia
- Large S wave in lead I
- Deep Q wave in lead III
- Inverted T wave in lead III
Pumonary embolism
- Sinus rhythm
- Q waves in leads III and AvF
- Depressed (ischaemic) ST segments in leads AvL and V6
Inferior infarction
- Sinus rhythm
- Q waves in leads I, II, AvL, V3, V4, V5
- Raised ST segments in leads V2 - V6
Anterolateral infarction
- Sinus rhythm
- Q waves in leads V2 - V4
- Inverted T waves in leads V4 - V6
Anterior infarction
Negative QRS deflections in II and III
Left axis deviation
Negative QRS deflections in I
Right axis deviation
3 stages of an acute MI?
- T wave peaking followed by T wave inversion
- ST segment elevation
- Appearence of new Q waves
Negative QRS deflections in II and III
Left axis deviation
- R wave in V5 (>25mm)
- or sum of the S wave in V1 and R wave in V5 or V6 >35mm
Left ventricular hypertrophy
- Dominant R wave in V1
- T wave inversion in V1 - V3 or V4
- Deep S wave in V6
Right Ventricular hypertrophy
Peaked P waves
Right atrial hypertrophy (P-Pulmonale)