What is the primary cause of increased pressure in the arteries of the lungs in pulmonary hypertension?
Upper respiratory infections
Chronic lung diseases
Narrowed or blocked lung blood vessels
Heart failure
Pulmonary hypertension is primarily caused by increased pressure within the lung arteries, often due to narrowed, blocked, or destroyed blood vessels. This leads to increased resistance and pressure in the pulmonary arteries. Heart failure and chronic lung diseases can exacerbate this condition, but they are not the root cause.
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