Zobrazeno 1 - 10 of 63 pro vyhledávání: '"Alfred A. Walker"'
1
Estimates of beat to beat handling of activator calcium using measurements of [Ca2+]i in aequorin loaded ferret cardiac muscle
Autor: Ferdinand Urthaler, Alfred A. Walker, Russell C. Reeves, L L Hefner
Publikováno v: Cardiovascular Research. 28:40-46
Objective: The aims were (1) to measure simultaneously and on a beat to beat basis intracellular calcium concentration ([Ca2+]i) transients and force transients in isolated ferret cardiac trabeculae; (2) to obtain and compare independent estimates of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0ed30645f1187be957b677770a34a96
https://doi.org/10.1093/cvr/28.1.40
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3
MDL-28170, a membrane-permeant calpain inhibitor, attenuates stunning and PKC epsilon proteolysis in reperfused ferret hearts
Autor: Kevin D Harris, Ferdinand Urthaler, Stanley B. Digerness, Alfred A. Walker, Paul E. Wolkowicz
Publikováno v: Cardiovascular research. 35(1)
This paper tests the hypothesis that calpains are activated in the ischemic (I)/reperfused (R) heart and contribute to myocardial stunning.Isolated ferret hearts were Langendorff perfused isovolumically, and subjected to 20 min of global I followed b
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb9b48ffa1f569101e5ee8cd79dd4deb
https://pubmed.ncbi.nlm.nih.gov/9302348
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4
Beat-to-beat measurements of [Ca2+]i and force in ferret cardiac muscle after chemical loading of aequorin
Autor: Alfred A. Walker, Ferdinand Urthaler, L L Hefner, Russell C. Reeves
Publikováno v: The American journal of physiology. 265(6 Pt 1)
This communication reports the development of a modified procedure for chemical loading of aequorin in small multicellular cardiac preparations, with special emphasis directed toward the implementation of a new method for computer-controlled low-phot
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::981827b9538a1f10722cd13f13918885
https://pubmed.ncbi.nlm.nih.gov/8279531
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5
Excitation-contraction coupling model to estimate the recirculating fraction of activator calcium in intact cardiac muscle
Autor: L L Hefner, Alfred A. Walker, Russell C. Reeves, Ferdinand Urthaler
Publikováno v: Canadian journal of physiology and pharmacology. 68(8)
Potentiated contractions were evoked with a rapid pace pause maneuver in 14 length-clamped ferret papillary muscles paced 12 times/min at 25 °C. At 1.25 mM [Ca2+]o the average steady-state force was 2.94 ± 1.08 g/mm2 and the potentiated contraction
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4845b0c3af5630be0a68863d8e64520f
https://pubmed.ncbi.nlm.nih.gov/1697217
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6
Effects of ryanodine on contractile performance of intact length-clamped papillary muscle
Autor: Alfred A. Walker, Russell C. Reeves, Ferdinand Urthaler, L L Hefner
Publikováno v: Circulation Research. 65:1270-1282
Extent, time course, and underlying mechanisms of the negative inotropic effect of ryanodine were examined in 22 length-clamped ferret right ventricular papillary muscles paced 12/min at 25 degrees C. After 60 minutes of exposure to 5 microM ryanodin
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49bc0c654af835c29e68b4c2e2c39815
https://doi.org/10.1161/01.res.65.5.1270
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7
The effect of aging on ventricular contractile performance
Autor: Alfred A. Walker, Thomas N. James, Ferdinand Urthaler
Publikováno v: American Heart Journal. 96:481-485
The effects of aging on mechanical performance of isolated canine right ventricular trabeculae were studied in two age groups. The first group was comprised of nine dogs, about 9 months of age. The second group was composed of seven dogs over 8 years
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ebab23c4c120e324dc86bded4ee148e7
https://doi.org/10.1016/0002-8703(78)90159-x
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Plný text Recenzováno Digitální knihovna AV ČR
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