Raynaud's phenomenon Mnemonic

Mnemonic for sequence of changes in Raynaud’s phenomenon: PCR (Polymerase Chain Reaction)

PCR Mnemonic stands for

P – Pallor (Stage of local syncope – extremity becomes pale)
C – Cyanosis (Stage of local asphyxia – extremity becomes cyanosed)
R – Redness (Stage of recovery – extremity turns red)