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- W2285712113 abstract "Contractile properties of isolated papillary muscles from three age groups of spontaeously hypertensive rats (SHRs) were compared to those from age-matched Wistar-Kyoto rats (WKYs) to assess whether there were differences between the strains preceding and during the course of the hypertension. In all three age groups (7, 12, and 50 wk), the mechanical refractory periods (MRP) were longer and aftercontractions more prominent after paired pulse stimulation in preparations from SHRs than from age-matched WKYs. Other isometric twitch properties of SHR papillary muscles at Lmax were not different from WKYs, with the exception of a shorter half-relaxation time in the youngest SHR group. Although hypertension and cardiac hypertrophy increased in SHRs with age, aging had similar influences on most cardiac contractile properties in both strains. None of the isometric properties of papillary muscles from rats made hypertensive by Doca treatment were different from those in normotensive control preparations. This suggests that differences seen between SHRs and WKYs probably represent genetic differences between these strains and are not directly caused by the hypertension." @default.
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- W2285712113 date "1978-07-01" @default.
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- W2285712113 title "Cardiac muscle mechanics from Doca- and aging spontaneously hypertensive rats" @default.
- W2285712113 doi "https://doi.org/10.1152/ajpheart.1978.235.1.h82" @default.
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