Brompton Tetralogy Risk Calculator by TimH|Published 20 June 2021 RV LGE Score ≤ 4 5 - 7 ≥ 8 None LV LGE Present? Yes No None RV Ejection Fraction ≥ 48% 36 - 47% ≤ 35% None LV Ejection Fraction ≥ 56% 36 - 55% ≤ 35% None Peak VO2 ≥ 18 ml/kg/m2 ≤ 17ml/kg/m2 None B-Type Naturetic Peptide ≤ 126ng/l ≥ 127 ng/l None Sustained atrial tachyarrhythmia Yes No None Age over 50 Yes No None Time's up