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Biomedical subjects

K Haas

Publications and source records attributed to K Haas.

50 records · Page 3Linked to original sources
PubMed1975

Quinidine hepatitis.

Long-term administration of quinidine was associated with persistent elevation of serum concentrations of SGOT, lactic acid dehydrogenase, and alkaline phosphatase. Liver biopsy showed active hepatitis. Discontinuance of quinidine therapy led to normalization of liver function tests. A challenge dose of quinidine caused clinical symptoms and abrupt elevation of SGOT, alkaline phosphatase, and lactic acid dehydrogenase values. We concluded that this patient had quinidine hepatotoxicity and believe that this is the first case reported with liver biopsy documentation. This report also suggests that, even after long-term administration, the hepatic toxicity is reversible.

Aged↗
PubMedDate not supplied

No change in NMDA receptor-mediated response rise-time during development: evidence against transmitter spillover.

Glutamatergic transmission was examined in tadpole optic tectum to test the possibility that transmitter concentration reaching N-methyl-D-aspartate (NMDA) receptors increases over development. Pharmacologically isolated NMDA receptor-mediated transmission was monitored with whole-cell recordings. Synaptic responses were recorded from cells at different locations in the optic tectum, corresponding to different stages of development. Rise-times and decay-times of NMDA currents were analyzed. We found no significant correlation between rise-time and developmental stage. As NMDA rise-times can correlate with concentration for glutamate concentrations below 200 microM, these results argue that, if there is developmental variation in transmitter concentration, this occurs for values greater than 200 microM. Furthermore, we found a correlation between rise-times and decay-times, consistent with a model in which transmitter concentration is high and rise-time is controlled by channel closings. These results argue against synaptic models in which low concentrations of transmitter (as by spillover from nearby release sites) selectively activates NMDA receptors.

Animals↗
PubMedDate not supplied

[Cardio-facio-cutaneous syndrome--visual diagnosis of a rare syndrome].

This is a report of a case of cardio-facio-cutaneous (CFC) syndrome in a three-year-old boy. Apart from obvious signs of retardation in his mental and motor development, the child was conspicuous through his short stature, relative macrocephaly, vitium cordis, pendular nystagmus and ptosis and optic atrophy on both sides. The typically dysmorphic facial features that characterize this syndrome such as high forehead, biparietal impression, downward slant of the palpebral fissures, hypoplastic supraorbital ridges, depressed nasal bridge, high palate, and dysplasia of the ears, were particularly marked in this case. The hands and feet were plump, the skin rather thick, and the hair sparse and very curly. A chromosome analysis as well as metabolism tests proved normal. Until now there have been 27 reports of such cases in medical literature.

Abnormalities, Multiple↗
PubMedDate not supplied

Preventing pseudoaneurysms following femoral cannulization.

Femoral artery pseudoaneurysms following invasive angiographic procedures are an increasingly common phenomenon, especially since the advent of thrombolytic therapy and the use of larger arterial catheters. This article describes the critical care nurse's role in identifying and assessing patients at risk for pseudoaneurysms, managing a patient who develops this complication, and assisting with treatment. Preventing pseudoaneurysms--and recognizing them promptly if they occur--can reduce patient hospitalization and mortality.

Aneurysm, False↗
PubMedDate not supplied

How much does a regional immunization registry increase documented immunization rates at primary care sites in rural colorado?

OBJECTIVE: To determine increases in immunization up-to-date (UTD) rates at a rural pediatric practice with the sequential addition of records from other sites in a 2-county region. DESIGN/METHODS: UTD rates for children aged 3 months to 35 months (n = 876) were determined for the index practice and then recalculated after sequential addition of records from 1) the other private practice in the region, 2) 7 public primary care sites, and 3) 2 public health clinics in the region. RESULTS: Adding records from all sites increased documented UTD rates in the index practice from 49% to 64% at 3 months (N = 33, P = 0.025), 50% to 68% at 5 months (N = 38, P = 0.008), 28% to 45% at 7 months (N = 113, P <.01), 29% to 54% at 12 months (N = 200, P <.001), 11% to 35% at 19 months (N = 124, P <.001), and 10% to 33% at 24 months (N = 368, P <.001). CONCLUSIONS: Regional registries will be valuable tools for immunization delivery if there is an ongoing commitment to effective collection of current and historical immunization data.

Child, Preschool↗
PubMedDate not supplied

Epicuticular waxes and flavonol aglycones of the European mistletoe, Viscum album L.

Cuticular waxes of Viscum album ssp. album contain oleanolic acid as main constituent, accompanied by aliphatic compounds like alkanes, esters and primary alcohols. A number of flavonol aglycones (methyl ethers of quercetin and kaempferol) have also been identified. Seasonal changes in amount and composition of cuticular waxes and the presence of flavonol aglycones are described and the ecophysiological significance of flavonoids on the surface of the mistletoe is briefly discussed.

Flavonoids↗