The Guillain-Barré syndrome at two hospitals in Trinidad, West Indies: a review of 26 patients / El síndrome de Guillain-Barré en Trinidad, West Indies: una revisión de 26 pacientes

Over a four-year period, 26 consecutive patients with Guillain-Barré syndrome (GBS) were seen. Their ages ranged from 18 months to 68 years. Fifteen were male and 11 female. The crude annual incidence was estimated to be 1.5 per 100 000population. East Indians made up the majority of the patients. An antecedent infection was reported in 65% of patients. Significant pain was present in half of the cohort. F-wave abnormalities were the commonest electrophysiological disturbance. Twenty-nine per cent of patients required ventilation. Intravenous immunoglobulin (IVIG) treatment was beneficial in 88% of patients. Eighty-four per cent made a complete or near complete recovery. One patient died.

Por un periodo de cuatro años, se atendieron 26 pacientes consecutivos con el síndrome de Guillain- Barré (GBS). Sus edades fluctuaban de 18 meses a 68 años. Quince eran varones y 11 hembras. Se calculó que la incidencia anual bruta era 1.5 por 100 000 población. La mayor parte de los pacientes eran indo-orientales. El 65% de pacientes reportó antecedentes de infección. La mitad de la cohorte presentaba dolor significativo. El trastorno electrofisiológico más común fue las anormalidades de la onda F. Veintinueve por ciento de los pacientes necesitaron ventilación. El tratamiento de inmunoglobulina intravenosa (IVIG) fue beneficioso en 88% de los pacientes. Ochenta y cuatro por ciento tuvo una recuperación completa o casi completa. Un paciente murió.

The Guillain-Barré syndrome at two hospitals in Trinidad, West Indies: a review of 26 patients.

Over a four-year period, 26 consecutive patients with Guillain-Barrd syndrome (GBS) were seen. Their ages ranged from 18 months to 68 years. Fifteen were male and 11 female. The crude annual incidence was estimated to be 1.5 per 100,000 population. East Indians made up the majority of the patients. An antecedent infection was reported in 65% of patients. Significant pain was present in halfofthe cohort. F-wave abnormalities were the commonest electrophysiological disturbance. Twenty-nine per cent of patients required ventilation. Intravenous immunoglobulin (IVIG) treatment was beneficial in 88% of patients. Eighty-four per cent made a complete or near complete recovery. One patient died.

The Guillain-Barré syndrome following dengue fever.

A 44 year old female presented with fever, muscle aches, rash and a low platelet count. IgM antibody to dengue virus was positive. Two weeks later she developed a flaccid areflexic quadriparesis. Nerve conduction studies showed a predominantly demyelitinating sensory motor polyneuropathy consistent with Guillain-Barré syndrome. Despite the relatively common occurrence of dengue fever, an associated polyradiculoneuropathy is distinctly uncommon.

The Guillain-Barré syndrome following dengue fever

A 44 year old female presented with fever, muscle aches, rash and a low platelet count. IgM antibody to dengue virus was positive. Two weeks later she developed a flaccid areflexic quadriparesis. Nerve conduction studies showed a predominantly demyelitinating sensory motor polyneuropathy consistent with Guillain-Barré syndrome. Despite the relatively common occurrence of dengue fever, an associated polyradiculoneuropathy is distinctly uncommon.

Maturation of electroretinograms and visual evoked potentials in preterm infants.

Electroretinograms (ERGs) and visual evoked potentials (VEPs) to flash stimulation were recorded from 51 infants (gestational age 26 to 42 weeks; post-conceptional age (PCA) 31 to 47 weeks) to give cross-sectional data on the maturation of these responses. Sequential recordings were taken from a separate group of 24 preterm infants (gestational age 28 to 33 weeks) to give longitudinal data. There was a significant decrease in ERG a-wave latency and increase in a-b amplitude with increasing PCA in both groups. For the VEPs there was a significant decrease in latency of the early negative component (N1) and the major positive component (P2). Comparison between recordings made on preterm infants with those from term infants at an equivalent PCA suggested faster maturation of VEPs in the extra-uterine environment, but no difference in maturation of the ERG.

Elevation of plasma vasopressin in spontaneous migraine.

Vasopressin is a vasoactive hormone secreted from the posterior pituitary. At low concentration its role is in regulating renal water excretion, but at higher concentrations it has a number of extrarenal actions, including effects on blood flow. To investigate the role of vasopressin in spontaneous migraine, paired samples were collected from 14 subjects (a) during an acute attack of spontaneous migraine, and (b) when symptom-free for at least seven days. During an attack, vasopressin was consistently raised (median (range) 3.5 (1.2-9.6) pg/ml v 0.5 (0.5-1.1) pg/ml, p less than 0.001). The highest vasopressin concentration occurred in the only patient who vomited. The results suggest vasopressin rises during an attack of spontaneous migraine, and this may, in part, be related to emesis. In the majority, vasopressin levels only rose sufficiently to have some renal antidiuretic effect, although in some these levels could have been sufficient to cause alteration in peripheral blood flow. Release of vasopressin may be responsible for the facial pallor and antidiuresis observed in migraine.