Characteristics of patients with idiopathic pulmonary arterial hypertension (IPAH) who benefit from long-term calcium channel blockers (CCB) are unknown.
Centre des Maladies Vasculaires Pulmonaires, UPRES EA 2705, Service de Pneumologie et Réanimation Respiratoire, Hôpital Antoine Béclère, AP-HP, Université Paris-Sud, Clamart, France. olivier.sitbon@abc.aphp.fr