The cardiac axis is the resultant direction of the flow of current of depolarization through the heart.

• The normal axis of heart is the range from –30 degree to +90 degree,
• In Heart with normal axis Lead I and Lead III will have positive QRS, in Left Axis Deviation Lead I will have negative QRS,
• Cardiovascular System examination, cardiac disorders
• While in right axis Deviation Lead I will have negative QRS and Lead III will have positive QRS.

The cardiac axis Right Axis Deviation

• As in image these axis are approaching toward each other,

Causes of Right Axis Deviation —

• RVA ( right ventricular hypertrophy )
• RBB ( right bundel branch block )
• Emphysema,
• and in Normal persons ,

Treatment of Right Axis Deviation —

• Normal condition it dose not require no treatment only evaluation,

The cardiac axis Left Axis Deviation

• As in image these axis are leaving each other,

Causes of Left Deviation —

• LVH ( left ventricular hypertrophy ),
• IHD ( ischemic heart disease ),
• Hyperkalemia,

Treatment of Left Axis Deviation —

• Normal condition it dose not require no treatment only evaluation,