Page 28 - Rapid Review of ECG Interpretation in Small Animal Practice, 2nd Edition

Evaluation of the Electrocardiogram

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aVF–
I 2 II– –90° III– I
–120° 4 –60°
aVR+ aVL–
–150° –30°

II
I– +/–180° 0° I+ II
3
+150° +30°
aVL– aVR–
III +120° +90° +60° III
III+ II+
aVF+
3

aVR
aVR
1 aVF–
4 II– –90° III–
–120° –60°
aVR+ 2 aVL– aVL
aVL –150° –30° 1

I– +/–180° 0° I+
aVF
aVF +150° +30°
aVL– aVR–
+120° +60°
III+ +90° II+
aVF+

50 mm/s 20 mm/mV 25 mm/s 10 mm/mV

Fig. 2.6 Right shift (right panel) and left shift (left panel) in the mean electrical axis. See Figure 2.5 for
numerals.

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