Antezana, G2026-03-222026-03-221982https://andeanlibrary.org/handle/123456789/13784Abstract. La Paz, the capital of Bolivia, a city with about 700,000 inhabitants, extends itself from an altitude of 4000 m above sea level down to 3200 m. The altitude of the Bolivian Institute of Altitude Biology (I.B.B.A.) is 3600 m or 12,200 ft. At this altitude the atmospheric pressure averages about 499 mmHg, which provides an inspired oxygen tension (PIO2) of 95 mmHg.enPRESIÓN ARTERIAL PULMONARFLUJO SANGUÍNEO PULMONARPRESIÓN DE CUÑA PULMONARZONA DE PULMÓNBook chapter