HIF1A and pulmonary arterial hypertension: Pulmonary hypertension (PH) can be caused by hypoxia (Weitzenblum and Chaouat, 2001) or conditions mimicking hypoxia by high NO production leading to inhibition of mitochondrial electron transport and induction of Hif1α (hypoxia‐inducible factor α) (Fijalkowska et al., 2010).