CVS DISORDERS. Kawasaki Disease (KD) Definition: Kawasaki disease is an acute, self-limiting vasculitis of unknown origin, primarily affecting medium-sized arteries, including the coronary arteries, in children <5 years. Causes & Risk Factors: Signs & Symptoms (CRASH & Burn Mnemonic): Complications: Diagnosis: Management: Rheumatic Fever (RF) Definition: Rheumatic fever is a post-streptococcal autoimmune disease affecting the heart, joints, skin, and CNS, primarily occurring 2-4 weeks after a Streptococcus pyogenes infection. Causes