|The most common cause of PH worldwide is left heart disease.
PH due to left heart disease is often caused by high pressure in the left side of the heart which results in increased pressure inside the lung. The signs and symptoms of PH due to left heart disease may sound familiar to those with heart disease: shortness of breath, difficulty breathing while lying down, swelling in the legs or stomach, abdominal pain or distention, and/or decreased ability to exercise.
Risk factors for PH due to left heart disease include age, coronary artery disease, heart failure, blockage (stenosis) or leakiness (regurgitation) of left aortic and mitral valves, atrial fibrillation and obesity (body mass index over 30). For these individuals, symptoms may improve with a low sodium diet and exercise.
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