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New Treatment May Reduce High Blood Pressure in the Lungs

By Denise DeWitt HERWriter
 
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Pulmonary arterial hypertension (PAH) is a serious condition that makes breathing difficult and causes exhaustion that can limit every day activities. PAH is a rare condition that is more common in women as in men. Now, a new study by researchers at the Max Planck Institute for Heart and Lung Research and Giessen University suggested a simple and effective treatment may be available in the future.

Blood is pumped through the body to deliver oxygen to cells and pick up waste products including carbon dioxide. Blood coming back from the cells travels into the right side of the heart and is pumped out to the lungs to drop off waste and pick up a fresh supply of oxygen. It then enters the left side of the heart to be pumped back out to the body. This continuous flow of blood provides a constant supply of oxygen and nutrients to every cell in the body.

The word “pulmonary” refers to things involving the lungs. So pulmonary arterial hypertension is high blood pressure in the arteries that carry blood from the heart to the lungs. PAH can be caused by other heart and lung conditions and by blood clots that block blood flow. Some people inherit PAH from a parent while others develop the condition with no family history.

The arteries and veins that make up the system of blood vessels in the body are lined on the inside with tissue called the endothelium. Healthy endothelium is very smooth to reduce friction and allow blood to flow easily. The endothelium regulates how blood vessels grow and also controls the size of blood vessels to balance the flow of blood to different parts of the body. When more blood is needed, the endothelium can cause the blood vessel walls to thin, making the hollow space in the blood vessel larger to allow faster blood flow.

In PAH, the endothelium appears to malfunction and cause the walls of the blood vessels leading from the heart to the lungs to contract, which narrows the passage inside the artery and increases blood pressure. When blood flow to the lungs is limited, the right side of the heart must pump harder to force the blood through at higher pressure.

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We value and respect our HERWriters' experiences, but everyone is different. Many of our writers are speaking from personal experience, and what's worked for them may not work for you. Their articles are not a substitute for medical advice, although we hope you can gain knowledge from their insight.

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