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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