🩺 Kawasaki Disease Coronary Z-Score & Risk Calculator
AHA 2024 GuidelinesCompute BSA-adjusted coronary artery Z-scores (Boston McCrindle 2007 & Montreal Dallaire 2011), stratify AHA Risk Levels (1 through 5.4), calculate Son et al. & Kobayashi risk scores, and view tailored antithrombotic ladders and follow-up schedules.
Core Kawasaki Disease Clinical Principles (AHA 2024 / 2017)
No involvement: Z < 2
Dilation only: Z 2.0 to <2.5
Small aneurysm: Z 2.5 to <5.0
Medium aneurysm: Z 5.0 to <10.0 and absolute < 8 mm
Giant aneurysm: Z ≥ 10.0 or absolute ≥ 8.0 mm
Patients with Age < 6 months, Baseline Z ≥ 2.5, or Son Risk Score ≥ 3 points are at high risk of CAA by 8 weeks and should receive dual anti-inflammatory therapy (IVIG 2 g/kg + Infliximab 10 mg/kg OR IVIG + Prednisolone RAISE taper).
Small CAAs require low-dose ASA alone. Medium CAAs receive DAPT (ASA + Clopidogrel). Giant CAAs require ASA + Systemic Anticoagulation (Warfarin INR 2–3, LMWH, or direct oral anticoagulants such as Apixaban or Edoxaban per 2024 statement).