PMID: 15339252Sep 2, 2004Paper

The heart: an end-organ of GH action

European Journal of Endocrinology
Annamaria ColaoGaetano Lombardi

Abstract

Several experimental and clinical studies have indicate that the heart is an end-organ of GH action. Patients with either childhood- or adulthood-onset GH deficiency (GHD) have abnormalities of cardiac structure and function, such as reduced cardiac mass, impaired diastolic filling and reduced left ventricular response at peak exercise. These cardiovascular abnormalities can be reversed, at least partially, after GH replacement therapy. On the other hand, the chronic overproduction of GH and IGF-I in acromegaly leads to the development of a specific cardiomyopathy. Concentric cardiac hypertrophy occurs in more than two-thirds of patients at diagnosis and is commonly associated with diastolic dysfunction. In later stages, impaired systolic function ending in heart failure can occur if GH/IGF-I excess is not controlled. Additionally, acromegalic cardiomyopathy is complicated by abnormalities of cardiac rhythm and cardiac valves. Successful control of acromegaly is accompanied by a decrease of the left ventricular mass and improvement of cardiac function. These beneficial effects appear earlier in young patients with short disease duration than in elderly patients. In conclusion, GH and IGF-I play a main role in the regulation of ...Continue Reading

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