Cardiovascular
1891, Europe (Ernst von Romberg's published clinical case description)
Pulmonary hypertension, characterized by elevated pressure within the arteries supplying the lungs, remained entirely invisible to medicine until the development of instruments and concepts capable of measuring pressure within the cardiovascular system. For most of medical history, the changes wrought by this condition inside the chest were discovered only at autopsy, and clinicians who encountered its effects had no framework to understand the pulmonary circulation as a system capable of its own pathological pressurization. Its history was therefore largely a history of anatomical discovery and the slow invention of the tools needed to see inside a living heart.
Historical Narrative
The story of pulmonary hypertension as a medical concept could not begin until physicians understood that a pulmonary circulation existed at all. For centuries, Galenic anatomy held that blood passed from the right side of the heart to the left through invisible pores in the interventricular septum, making a separate circuit through the lungs theoretically unnecessary. This framework left no conceptual room for the idea that the vessels of the lung could develop their own pressure abnormalities.
The decisive conceptual break came in the thirteenth century when the Arab physician Ibn al-Nafis proposed, based on logical and anatomical reasoning, that blood could not cross the cardiac septum and must instead travel through the lungs. His work remained largely unknown to European medicine for centuries. It was not until the sixteenth century that Michael Servetus independently described pulmonary circulation in his theological work Christianismi Restitutio, published in 1553, and shortly afterward that Realdo Colombo provided a more detailed anatomical account based on dissection and vivisection experiments.
William Harvey's landmark publication of 1628, De Motu Cordis, established the circulation of the blood as a unified mechanical system, with the right heart specifically identified as the pump driving blood through the lungs. Harvey's work created the intellectual foundation upon which any concept of pulmonary vascular disease could eventually be built, though Harvey himself did not describe pathological conditions of the pulmonary vessels.
Autopsy findings throughout the seventeenth and eighteenth centuries occasionally documented enlarged right hearts and thickened pulmonary vessels in individuals who had died after prolonged respiratory illness, but these observations were interpreted as consequences of lung disease rather than vascular disorders in their own right. Giovanni Battista Morgagni, whose monumental work De Sedibus et Causis Morborum published in 1761 correlated clinical histories with autopsy findings in hundreds of cases, described cardiac enlargement associated with chronic lung conditions, foreshadowing later understanding of what would eventually be called cor pulmonale.
The German pathologist Ernst von Romberg published in 1891 what many historians of medicine consider the first clinical description of what was later understood to be primary pulmonary hypertension — a case of a young patient with severe right heart enlargement and thickened pulmonary arteries in the absence of lung or left heart disease. This observation was remarkable because it suggested the pulmonary vasculature could develop a primary pathological process of its own.
The twentieth century transformed understanding through the development of cardiac catheterization. Werner Forssmann's audacious self-catheterization in 1929 and the subsequent refinements by André Cournand and Dickinson Richards, work for which all three received the Nobel Prize in Physiology or Medicine in 1956, made it possible for the first time to measure pressures within the living heart and pulmonary vessels. These techniques allowed clinicians to document elevated pulmonary arterial pressure in living patients, transforming what had been a purely postmortem curiosity into a recognizable and measurable clinical syndrome. The condition gained formal nosological recognition and a name during the mid-twentieth century as catheterization data accumulated in research centers across Europe and North America.
Key Historical Figures
Historical narrative only — this page describes how Pulmonary hypertension was understood historically. It is not medical advice and does not describe current diagnosis or treatment. Sourced from verified medical history references (NIH, Encyclopaedia Britannica, and standard medical history texts). See our medical disclaimer.