Increasing Incidence and Prevalence of World Health Organization Groups 1 to 4 Pulmonary Hypertension A Population-Based Cohort Study in Ontario, Canada

摘要

BACKGROUND: The World Health Organization recognizes 5 groups of pulmonary hypertension (PH), categorized by pathogenesis or comorbidity: 1-pulmonary arterial hypertension 2-left-heart disease, 3-lung disease and hypoxia 4-chronic thromboembolic disease, and 5-miscellaneous. The epidemiology of PH, apart from group 1, is largely unknown.