ABSTRACT
Objective:To investigate the characteristics and change law of influenza in Fuling District of Chongqing in 2010-2019, and to provide a scientific basis for the pre-control of influenza.Methods:We performed an epidemiological analysis on the data of influenza-like illness reported by Fuling District influenza surveillance sentinel hospitals in Chongqing in 2010-2019.Results:In 2010-2019, a total of 42 169 cases of influenza-like illness were reported in Fuling District, with an average treatment rate of 1.22%. The activity of influenza-like illness peaked in winter, spring, and summer. There were 22 788 cases in the group of cases aged < 5 years, accounting for 50.4%. In 2010-2019, a total of 8049 pharyngeal swabs were collected to screen for influenza-like illness, with a positive rate of 14.52%. Influenza virus A H3 positive rate was highest, accounting for 37.98%, followed by influenza virus B BV positive rate, accounting for 30.80%. The highest influenza virus-positive rate was reported in January (26.34%), followed by November (24.85%).Conclusion:Influenza in the Fuling district of Chongqing mainly occurs in winter, spring, and summer. Influenza virus A H3 is the dominant strain. Children and school students are prone to develop influenza-like illnesses. We should continue to strengthen the monitoring of influenza strains, greatly promote vaccination, and strengthen the monitoring and prevention of influenza-like illness among susceptible populations.
ABSTRACT
Objective：Our aim was to investigate the QT dispersion in patients with cor pulmonale and whether the QT dispersion was affected by cardiac function and hypoxemia of the patients with cor pulmonale. Methods：Fifty-one patients with cor pulmonale and 28 age-matched normal controls underwent electrocardiography, echocardiography, and arterial blood gas analysis. The QT dispersion was measured manually. Results:The QT dispersion was significantly longer in patients with cor pulmonale than those in the controls (70.1 ± 25.8 ms vs 37.6 ± 12.5 ms, P< 0.001). The QT dispersion in the patients with right heart failure was markedly longer compared with those with normal cardiac function (87.9 ± 21.6 ms vs 51.7 ± 14.2 ms, P<0.001). The QT dispersion was affected by hypoxemia. The QT dispersion in the groups of PaO2< 8 kPa or ≥ 8 kPa was 81.0 ± 25.9 ms and 62.1 ± 21.1 ms, respectively. There was significant difference between the groups (P< 0.01). The QT dispersion was significantly correlated with the interior diameter of right ventricle in the patients with cor pulmonale (r= 0.489, P< 0.01). Conclusion: The QT dispersion may be a useful parameter in the diagnosis for cor pulmonale and in the assessment of cardiac function in the patients with cor pulmonale.