The ECG Workbook by Angela Rowlands & Andrew Sargent

Author:Angela Rowlands & Andrew Sargent
Language: eng
Format: mobi
Publisher: M&K Update
Published: 2010-11-01T00:00:00+00:00

Figure 6.5a: Normal electrical conduction; the impulses move towards Lead II.

Figure 6.5b: Left axis deviation; the impulses move in the approximate direction of Lead aVL.

Figure 6.5c: Right axis deviation; the impulses now move in the direction of Lead III.

Figure 6.5d: Extreme axis deviation; all electrical activity is moving in the opposite direction to normal.

Calculating axis deviation in degrees using the Hexaxial Reference System

Here is a step-by-step method to follow:

1 Look at the ECG and decide, by looking at Lead I and Lead aVF, if it is a normal, left, right or extreme axis deviation. If lead 1 is equiphasic (a complex that is as positive as it is negative), it is sufficient at this stage to say that it is either a left or a normal axis, for example.

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