Limb diffefence in Bloodpressure

Blood pressures in the arms
Normally the difference is less than 10 mmHg
Right upper limb BP> left upper limb BP
Right - Left upper limb BP difference > 10 mmHg is seen in

• Obstruction of aorta, or subclavian arteries
• Supravalvular aortic stenosis

Blood pressures in lower limb
Lower limb BP > Upper limb BP
Normally difference is less than 20 mmHg.
Lower limb BP-Upper limb BP> 20 mmHg is seen in

• Aortic regurgitation

Lower limb BP < Upper limb BP observed in

• Coarctation of aorta
• Takayasu disease