Ventilatory responses to hypercapnia in patients with mild and severe hypothyroidism

The ventilatory responses are shown as the relationships between alveolar carbon dioxide (PACO2) and VE (STPD).

PACO2: partial pressure of carbon dioxide; STPD: standard temperature and pressure dry; VE: minute ventilation.

Data from: Zwillich AA, Pierson DJ, Hofeldt FD. Ventilatory control in myxedema and hypothyroidism. N Engl J Med 1975; 292:662.