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The differences in clinical findings at admission between patients with hypercapnia and hypo‐normocapnia. The patients with hypercapnia are more likely to be in NYHA Class IV, to have acute onset within 6 h, and to have radiographic pulmonary oedema than those with hypo‐normocapnia. Disturbance of consciousness was also more frequently observed in hypercapnic patients than those with hypo‐normocapnia. NYHA, New York Heart Association.
