ObjectiveAtrial fibrillation is one of the major risk factors of ischemic stroke. Endovascular thrombectomy (EVT) has become the standard treatment for acute ischemic stroke with large vessel occlusion. However, data regarding the impact of AF on the outcome of patients with acute ischemic stroke treated with mechanical thrombectomy are controversial. The aim of our study was to determine whether atrial fibrillation modifies the functional outcome of patients with anterior circulation acute ischemic stroke receiving EVT.MethodsWe reviewed 273 eligible patients receiving EVT from January 2019 to January 2022 from 3 comprehensive Chinese stroke centers, of whom 221 patients were recruited. Demographics, clinical, radiological and treatment characteristics, safety outcomes, and functional outcomes were collected. Modified Rankin scale (mRS) score ≤ 2 at 90 days was defined as a good functional outcome.ResultsIn our cohort, 79 patients (35.74%) were eventually found to have AF. Patients with AF were elder (70.08 ± 11.72 vs. 61.82 ± 13.48 years, p = 0.000) and less likely to be males (54.43 vs. 73.94%, p = 0.03). The significant reperfusion rate (modified thrombolysis in cerebral infarction 2b-3) was 73.42 and 83.80% in patients with and without AF, respectively (p = 0.064). The good functional outcome (90-day modified Rankin scale: 0 to 2) rate was 39.24 and 44.37% in patients with and without AF, respectively (p = 0.460) after adjusting multiple confounding factors. There was no difference in the presence of symptomatic intracerebral hemorrhage between the two groups (10.13 vs. 12.68%, p = 0.573).ConclusionDespite their older age, AF patients achieved similar outcomes as non-AF patients with anterior circulation occlusion treated with endovascular therapy.

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In this paper, the method to measure moisture content of oil-free pressboard with single frequency experimental method is studied and the paper focuses on the implementation of experimental studies based on dielectrometry. Accurately monitoring and controlling of moisture can be implemented by the measurement of the permittivity of pressboard. A capacitive sensor is used to monitor the dielectric response of the pressboard. The effects of frequency and temperature to the signal of capacitive sensor are analyzed. The models of effects of frequency and temperature on signal are developed with studying of the dielectric polarization and dielectric loss of pressboard. A universal expression relating permittivity and moisture content of oil-free pressboard is developed to calculate the moisture concentration in the pressboard by fitting the moisture data obtained from the drying experiments to the dielectric properties of pressboard. Real-time on-line measurement of the moisture diffusion process is achieved in this study and the moisture profile in transformer pressboard is non-destructively estimated.