noun
orthopnea
Medical term for difficulty breathing when lying flat, relieved by sitting up. Common in cardiology and respiratory contexts.
心不全の患者は起座呼吸を訴えることが多い。
Patients with heart failure often complain of orthopnea.
起座呼吸がある場合は、上半身を起こした姿勢をとらせてください。
If orthopnea is present, have the patient sit upright.
Compound of 起座 (kiza, 'sitting up') and 呼吸 (kokyū, 'breathing'). The exact historical derivation is uncertain; the term is a modern medical coinage.