Triage assessment of cardiorespiratory risk status based on measurement of the anaerobic threshold, and estimation by patient-reported activity limitation

Saranya Thurairatnam; Filip Gawecki; Timothy Strangeways; Joseph Perks; Vatshalan Santhirapala; Jonathan Myers; Hannah C Tighe; Luke SGE Howard; Claire L Shovlin

Box plots comparing values between the low risk and high risk anaerobic threshold (AT) groups for 26 pulmonary AVM patients, where high risk status was defined by AT lower than 11ml.min -1 kg -1 : A) Haemoglobin (g.dL -1 ); B) The lowest 10 VSAQ scores and associated exercise limitations are plotted against age. Horizontal bands indicate the respective New York Heart Association (NYHA [25] ) categories of I (no symptoms on ordinary physical activity), II (limited on ordinary activity), III (limited at 20-100m) , and IV (limited at rest). To indicate lower and higher risk categories, the regression line is plotted for an anaerobic threshold of 11 ml.min -1 .kg -1 . To provide an indication of confidence limits, and the direction and scale of variation if this threshold scale were to be adjusted, regression lines for anaerobic thresholds of 10 and 12 ml.min -1 .kg -1 are also plotted S u p p l e m e n t a r y F i g u r e 3