PHN has various meanings in the Medicine category. Discover the full forms, definitions, and usage contexts of PHN in Medicine.
Motor nerve to the diaphragm, originating from the vertebral column in the neck and transversing the thoracic cavity. Important in diaphragmatic respiration. Can be irritated in the neck by a poorly designed seat harness. Repeated pressure surges in the abdominal cavity caused by movement of the back required by improper seat height are transmitted to the diaphragm and may cause pain to be projected to the shoulder.
MedicinePulmonary hypertension (PH or PHTN) is an increase of blood pressure in the pulmonary artery, pulmonary vein, or pulmonary capillaries, together known as the lung vasculature, leading to shortness of breath, dizziness, fainting, leg swelling and other symptoms. Pulmonary hypertension can be a severe disease with a markedly decreased exercise tolerance. It was first identified by Ernst von Romberg in 1891.
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