Figure 3From: Molecular physiopathogenetic mechanisms and development of new potential therapeutic strategies in persistent pulmonary hypertension of the newborn Pulmonary arteriole from a 4-week-old non hypoxemic infant. The relative medial muscle mass has decreased since birth (Verhoeff’s and Van Gieson’s stains). From Naeye and Letts [20], Pediatrics 1992.Back to article page