Nail bed blanching, also known as Quincke sign, is associated with which condition?

Nail bed blanching, also known as Quincke sign, is associated with which condition?

• A. Quincke sign
• B. Corrigan sign
• C. Duroziez sign
• D. Traube sign

Answer: (A)

Nail bed blanching, or Quincke sign, reflects capillary pulsations produced by the wide pulse pressure seen in aortic regurgitation. The rapid rise in systolic pressure and fall in diastolic pressure with regurgitant flow causes the nail capillaries to visibly pulsate with each heartbeat, producing transient blanching or color changes. This makes Quincke sign a classic clue to aortic regurgitation. Other peripheral signs, like Corrigan’s pulse, Traube’s sign, or Duroziez sign, are related but describe different vascular or arterial findings in the same condition.

Nail bed blanching, or Quincke sign, reflects capillary pulsations produced by the wide pulse pressure seen in aortic regurgitation. The rapid rise in systolic pressure and fall in diastolic pressure with regurgitant flow causes the nail capillaries to visibly pulsate with each heartbeat, producing transient blanching or color changes. This makes Quincke sign a classic clue to aortic regurgitation. Other peripheral signs, like Corrigan’s pulse, Traube’s sign, or Duroziez sign, are related but describe different vascular or arterial findings in the same condition.