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Biomedical subjects

S Castelli

Publications and source records attributed to S Castelli.

47 records · Page 3Linked to original sources
PubMedDate not supplied

The effects of eledoisin on intestinal smooth muscle of ruminants.

The effects of eledoisin on the intestinal smooth muscle of ruminants are reported. The results obtained on isolated in vitro preparations from cattle suggest a direct effect of the peptide on the smooth muscle of the different intestinal sections examined. The observations made during in vivo experiments on sheep suggest that eledoisin produces its effects by also affecting the autonomic nerve supply to the intestine of these animals.

Acetylcholine↗
PubMedDate not supplied

[Non-immunologic hydrops fetalis. Considerations apropos of a case associated with a chorioangioma of the placenta].

A case of hydrops fetalis in a newborn infant in association with a choroangioma of the placenta in described. It was only with a report in 1943 by Potter that nonimmunologic hydrops fetalis was identified. Until recently immunologic hydrops fetalis secondary to Rh incompatibility has been the most frequent cause for infants with this condition. Presently, because of the decline in the incidence of Rh sensitization, non immunologic hydrops fetalis accounts for a larger number of cases. Numerous etiologies have been reported with the occurrence of non immunologic hydrops fetalis: a review of the literature for those entities found in association with this condition is inclused.

Edema↗
PubMedDate not supplied

[Velo-cardio-facial syndrome (Shprintzen syndrome)].

A patient with the velo-cardio-facial syndrome is described. The most frequent features include cleft palate, cardiac anomalies, typical facies, and learning disabilities. Less frequent findings include microcephaly, mental retardation, small stature, slender hands and digits, minor auricolar anomalies, and inguinal hernia. There were four instances of familial transmission in the 39 patients of the literature.

Abnormalities, Multiple↗
PubMedDate not supplied

[Magnesium in the prophylaxis of primary headache and other periodic disorders in children].

Migraine has been recently defined a "central neuronal hyperexcitability state", maybe magnesium-dependent, and magnesium has been occasionally employed in the therapy of adult migraine. The Authors, on the basis of their personal experience (previous electromyographic studies), consider childhood migraine and periodic syndrome as a clinical equivalent of spasmophilia, in which an intracellular deficit of magnesium has been demonstrated, and have employed a magnesium salt in the prophylaxis of childhood migraine and migraine equivalents. 40 children with periodic syndrome (17 M and 23 F, aged 10.4 +/- 2.9 years) have been treated with magnesium pidolate, with doses ranging from 1.5 g/die to 4.5 g/die (corresponding to 122-366 mg Mg++):25 of them presented migraine as the main symptom, 12 recurrent abdominal pain, 3 fever of unknown origin, along with many other periodic symptoms. The first control visits have been done at 1 month, clinical follow-up lasted a mean period of 6.1 months. Therapy was stopped at 1 month visit if ineffective (of some other drug was added); otherwise, magnesium therapy was continued with the same dosage for another month, then gradually reduced. Clinical response was considered good if crises ceased completely or their frequency was reduced to less than 33%; partial if reduced to less than 67% of previous incidence; absent if only slightly or not at all reduced. Clinical response was good in 72.5% of cases at 1 month, in 77.5% later; partial in 12.5% and 10%; absent in 15% and 12.5% respectively. No side effects were observed. The compliance of children and their families was complete.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMedDate not supplied

[Tests of autonomic nervous system functioning in children: normal values].

The study of cardiovascular autonomic reflexes is the most physiological and reliable test for the assessment of autonomic function: they consist of the analysis of variation of heart rate and arterial pressure provoked by many physiological stimuli. Up to now normal pediatric reference data were not available: we have standardized these tests in 198 normal children (94 M, 104 F), aged 8.3-15.7 years, without any symptom of possible autonomic dysfunction pathology. A complete auxological evaluation has been performed. Autonomic tests were performed by ECG recording and arterial pressure monitoring during normal and deep breathing, Valsalva manoeuvre, lying to standing postural change, isometric muscular contraction (sustained hand-grip and leg rising). Eleven autonomic parameters were obtained. Many statistical correlation between autonomic parameters and auxological features have been explored, without remarkable results. A significative difference emerged only between sexes. Normal reference values has been calculated. Their utility for the study of autonomic dysfunction is discussed.

Adolescent↗
PubMedDate not supplied

[Autonomic neural functioning in children with the periodic syndrome].

The pathogenesis of periodic syndrome (recurrent abdominal pain, cyclic vomiting, headache and other equivalents of childhood migraine) is often related in the literature to a "neuro-vegetative dysfunction", by which occasional stimuli (environmental, metabolic, emotional) should find a particular somatic expression. The homeostatic role of the autonomic nervous system could be deficient in these cases, but systematic research has never been done to explore this hypothesis. We have evaluated the autonomic nervous function in 38 children (12 M, 26 F) with periodic syndrome, by cardiovascular autonomic function tests. They consist of ortho- and parasympathetic parameters obtained by ECG registration and pressure monitoring during deep breathing, Valsalva manoeuvre, lying to standing postural change, sustained handgrip. In the absence of adequate pediatric references values, we have previously standardized these tests in a population of 198 healthy children (94 M, 104 F), aged 8.3-15.7 years. Results have been compared with our standard reference values, matching them by t-test for independent data: in both sexes, significant differences have been found out in only one of 11 parameters (p < 0.05) of the autonomic tests performed. Children affected by periodic syndrome reveal a reduced heart rate variation in transition from the early orthosympathetic phase to the late parasympathetic one after lying to standing passage, showing a smaller fluctuation of autonomic feedback systems. The physiological meaning of this result is unclear. However, in children with periodic syndrome no prevalence of ortho- or parasympathetic systems is evident.

Adolescent↗
PubMedDate not supplied

[Syncopal pathology in childhood (I)].

Syncope is a common phenomenon, well-known to all pediatricians: it is defined as a sudden transient loss of consciousness associated with inability to maintain postural tone that is incompatible with a seizure disorder, vertigo, dizziness, coma, shock or other states of altered consciousness. The purpose of this study are to analyse the multiple causes of syncope, to determine the characteristics of pediatric patients with syncope, to define the pathophysiologic mechanisms that result in neurally mediated syncope.

Adolescent↗