Overview of Idiopathic Hypertrophic Subaortic Stenosis
IHSS, or idiopathic hypertrophic subaortic stenosis, is a chronic heart condition that produces an enlarged heart muscle. This results in restricting the amount of blood the heart pumps. Cardiac output may be low, normal or high. The output depends on whether stenosis is obstructive or nonobstructive. If output is normal, IHSS could go undetected.
Causes of Idiopathic Hypertrophic Subaortic Stenosis
Idiopathic hypertrophic subaortic stenosis is caused by a thickening of the left chamber of the heart, or ventricle. The reason for this hypertrophy is unknown. It results in obstruction of the flow of blood. The heart may be unable to pump enough blood during exertion. The condition is sometimes inherited as a dominant genetic trait.
Signs and Symptoms of Idiopathic Hypertrophic Subaortic Stenosis
IHSS can produce chest pain, particularly with exercise. There may be irregularities of the heart rate. Due to restriction of outflow, fainting can occur. Shortness of breath, swollen feet and ankles, distended neck veins, heart failure, and heart murmur are other symptoms of IHSS.
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Medical Content Last Updated on 07/12/2008
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