American Heart Association: Primary or Unexplained Pulmonary Hypertension: Brief explanation of the diagnosis and treatment of PPH.
American Heart Association: Pulmonary Hypertension: Brief description of the cause and treatment of this disease.
Austrian Pulmonary Hypertension Self-Help Association: Features organization details, news, events, patient information, and contact details. [Information in English and German]
eMedicine - Primary Pulmonary Hypertension: In-depth article detailing the symptoms, diagnosis, and treatment of PPH.
eMedicine - Secondary Pulmonary Hypertension: In-depth article detailing the symptoms, diagnosis, and treatment of SPH.
Flolan Fashion File: Photos and descriptions of packs useful for carrying Flolan pumps.
Persistent Pulmonary Hypertension of the Newborn (PPHN): Article by Dennis E. Mayock, M.D., describing the background, diagnosis, and treatment of this disease.
PH Central: Features medical information, support options, news, events, research, forums and mailing lists, legislative action center, and personal pages.
PPH Cure Foundation: A non-governmental funder of medical research into the causes of and therapies for primary pulmonary hypertension. Includes background information, research articles, clinical trials, and patient stories.
Primary Pulmonary Hypertension: Features brief description of the causes, symptoms, and treatment of the disease.
Primary Pulmonary Hypertension (PPH) e. V.: Non-profit self help and support association. Includes background information and contact details. [Information in English and German]
Priority Healthcare Corporation: Pulmonary hypertension information covering symptoms as well as primary and secondary pulmonary hypertension.
Pulmonary Hypertension Association (UK): Features organization background, disease information, research articles, chat room, and message boards.
World Symposium on Primary Pulmonary Hypertension: Recap of the hightlights of this 2003 event. Includes discussion of the pathology, risk factors, and treatments.