EASY WAY TO REMEMBER: LEFT AXIS AND RIGHT AXIS DEVIATION

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 LEFT AXIS DEVIATION

SIMPLE CONCEPT: QRS-COMPLEX : (LEAD-1) AND (LEAD aVL) - [POSITIVE] 

                                                                 : (LEAD- 2, 3, aVF) - [NEGATIVE]



RIGHT AXIS DEVIATION

SIMPLE CONCEPT: QES COMPLEX : (LEAD-1) AND (LEAD aVL) - [NEGATIVE] {S-WAVE GREATER THAN R-WAVE}.

                                                                : (LEAD- 2, 3, aVF) - [POSITIVE]



CAUSES OF AXIS DEVIATION: 

RIGHT AXIS DEVIATION:

1) NORMAL VARIANT-TALL THIN PEOPLE.
2) RIGHT VENTRICULAR HYPERTROPHY.
3) LATERAL MYOCARDIAL INFARCTION ( PERI-INFARCTION BLOCK).
4) WPW SYNDROME.
5) LEFT POSTERIOR FASCICULAR BLOCK.

LEFT AXIS DEVIATION:

1) LEFT ANTERIOR HEMIBLOCK.
2) WPW SYNDROME.
3) INF. MI (PERI-INFARCTION BLOCK)
4) VENTRICULAR TACHYCARDIA.

                            

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