| http://www.w3.org/ns/prov#value | - Be aware that high levels can have causes other than heart failure, including left ventricular hypertrophy, ischaemia, tachycardia, right ventricular overload, hypoxaemia (including pulmonary embolism), GFR less than 60 ml/minute, sepsis, COPD, diabetes, age greater than 70 and liver cirrhosis.
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