1. Ambulatory pulmonary arterial pressure in primary pulmonary hypertension: variability, relation to systemic arterial pressure, and plasma catecholamines. Issue 2 (February 1990) Authors: Richards, A M; Ikram, H; Crozier, I G; Nicholls, M G; Jans, S Journal: Heart Issue: Volume 63:Issue 2(1990) Page Start: 103 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗