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- W3183041607 abstract "We have previously shown increased vascular reactivity to angiotensin (Ang) II in familial combined hyperlipidemia. However, this has not been well studied in familial hypercholesterolemia (FH), a condition with incipient endothelial dysfunction. This study aimed to examine microvascular and macrovascular responses to Ang II in FH. Therefore, we investigated the effects of a 3-hour infusion of Ang II on blood pressure and forearm skin microvascular function in 16 otherwise healthy patients with FH and matched healthy controls. Skin microvascular hyperemia was studied by laser Doppler fluxmetry during local heating. Microvascular resistance was determined by the ratio of mean arterial pressure to microvascular hyperemia. Macrovascular reactivity was assessed by changes in brachial blood pressure. Compared with the controls, the FH group had increased baseline systolic blood pressure (127 ± 14 vs. 115 ± 12 mm Hg; P = 0.02), while systolic blood pressure responses were similar (+24 ± 9 vs. +21 ± 7 mm Hg; P = 0.26) after 3 hours of Ang II infusion. At baseline, there were no group differences in microvascular hyperemia or resistance. However, after 3 hours of Ang II infusion, heat-induced microvascular hyperemia was less pronounced in FH (126 ± 95 vs. 184 ± 102 arbitrary units; P = 0.01), while microvascular resistance during heat-induced hyperemia was increased (1.9 ± 0.9 vs. 0.9 ± 0.8, P = 0.01), as compared to controls. Both these responses were further pronounced 1 hour after stopping Ang II. In conclusion, despite similar blood pressure responses to Ang II in the FH group and controls, microvascular dilatation capacity was impaired in the FH group, indicating endothelial dysfunction. These findings and increased microvascular resistance may lead to hypertension and microvascular complications in FH." @default.
- W3183041607 created "2021-07-19" @default.
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- W3183041607 date "2021-10-01" @default.
- W3183041607 modified "2023-10-16" @default.
- W3183041607 title "Altered Vascular Reactivity to Circulating Angiotensin II in Familial Hypercholesterolemia" @default.
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- W3183041607 doi "https://doi.org/10.1097/fjc.0000000000001106" @default.
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