[R00] Abnormalities of heart beat
[R01] Cardiac murmurs and other cardiac sounds
[R02] Gangrene, not elsewhere classified
[R03] Abnormal blood-pressure reading, without diagnosis
[R04] Haemorrhage from respiratory passages
[R05] Cough
[R06] Abnormalities of breathing
[R07] Pain in throat and chest
[R09] Other symptoms and signs involving the circulatory and respiratory systems