Abnormal cardiovascular reflexes in juvenile XXXX as preclinical signs of @entity4148 .

@entity1 @entity6 @entity591 @entity4148 @entity65 @entity5433 @entity551 @entity11460
The prevalence of @entity65 as a marker of @entity4148 was studied in a group of juvenile @entity6 with long-standing disease, aged 20-58 years (mean 36). No @entity1 had clinical evidence of @entity11460 . The study was carried out employing the most simple techniques and routine equipment. Resting heart rate, beta-to-beat variation, Valsalva ratio, systolic blood pressure in supine position and immediately after standing were measured. The results were compared with those determined in an age and sex-matched population. Beat-to-beat variation test appeared to be the most sensitive technique in detecting an impaired autonomic function (12/54 = 22.2%). Resting @entity591 was found in 10 @entity1 and @entity551 in 6. Only 1 @entity1 had an abnormal Valsalva ratio associated with @entity551 and reduced beta-to-beat variation. In agreement with previous studies our data confirm that @entity5433 is frequent in asymptomatic @entity6 . The methods to detect these abnormalities are easy to perform. Therefore they may be routinely used as screening tests in the @entity6 population.
