Definition of "orthopnœa"

We observed, on attentive examination, the following phenomena: cough, with sense of constriction in the middle of the chest; orthopnœa, threatening suffocation; face violet coloured; lips swollen; beatings of the jugular veins isochronous with those of the carotid arteries; palpitation; […]

1833, R. J. Bertin, translated by Charles W. Chauncy, Treatise on the Diseases of the Heart, and Great Vessels, Philadelphia: Carey, Lea & Blnachard, page 179