Objective To observe the influence of emergency PCI in different time windows to cardiac scar and cardiac function after myocardial infarction. Methods One hundred and twenty-seven patients with acute myocardial infarction, who were treated in different time windows by emergency PCI, were enrolled into this study. The cases were divided into two groups according to the time when they took PCI after onset;group 3 hPCI included 66 patients had PCI at 3 h after onset and group 6 hPCI included 61 patients had PCI at 6 h. At 4th, 8th and 12th weeks, the fragmented QRS (fQRS) were observed by twelve synchronization cardiogram; ventricle wall movement strain rate were determined by cardiac speckle tracking imaging;left ventricular ejection fraction (LVEF)were measured by cardiac ultrasound to evaluate cardiac events and cardiac function after myocardial infarction. Results At 4th,8th and 12th weeks,the fQRS positive leads were significantly more in 6 hPCI group than 3 hPCI group ( P ＜ 0. 05 respectively ) . The ventricle wall movements strain rate and LVEF improved significantly in 3 hPCI group compared with 6 hPCI group (P ＜ 0. 05 ). Conclusions The earlier emergency PCI treatment was applied and the earlier the"criminal"blood vessels were opened ,the more ischemic myocardial cells were restored. Combination use of fQRS、 STI and LVEF examination could improve the diagnosis of cardiac scar formation and direct protective therapy.

To study the antiviral effect of Hypericum perforatum L. extract (HPE) on influenza A virus (IAV) (H1N1) in vitro and in vivo. Cytopathic effect (CPE) and neutral red (NR) dye uptake were used to examine the antiviral effect of HPE on Madin Darby Canine Kidney (MDCK) cells which were infected with IAV in vitro. HPE was effective against influenza A virus (IAV) in vitro, with a 50% effective concentration (EC50) of 40 μg/mL. The mean 50% cytotoxic concentration (CC50) in the MDCK used in these experiments was 1.5 mg/mL. Ribavirin was run in parallel with EC50 values of 5.0 μg/mL; the mean CC50 for ribavirin was 520 μg/mL. Oral gavage administrations of HPE or ribavirin to mice infected with the IAV were highly effective in preventing death, slowing the decline of arterial oxygen saturation, inhibiting lung consolidation and reducing lung virus titers. The minimum effective dose of HPE in these studies was 31.25 mg/kg/day, which was administered twice daily for 5 d beginning 4 h prior to virus exposure. Below a dosage of 2000 mg/kg/day, almost all treated mice survived, which suggests that HPE is of low toxicity. Ribavirin's minimum effective dose was 40 mg/kg/day with the LD50 determined to be 200 mg/kg/day. Delay of the initiation of either HPE or ribavirin therapy, using approximately 1/3 LD50 dose each time, could still be protective as late as 48 h after exposure to the IAV. While both agents appeared to have similar efficacy against IAV infections, HPE was considered to be less toxic and may warrant further evaluation as a possible therapy for influenza.

NAS preparation, a kind of Chinese herbal medicine found by the Yunnan Eco-agricultural Research Institute, has potential antiviral activity. In this paper, the inhibiting effect of NAS preparation on H9N2 subtype Avian influenza virus (AIV) was investigated in vivo. Chickens infected with H9N2 virus were treated with NAS preparation for 4 days. The virus was then detected by hemoagglutination (HA) test and reverse transcription polymerase chain reaction (RT-PCR). The results showed that no H9N2 virus could be detected at the 7th day when the chickens were treated with 0.2g/kg/d or 0.1g/kg/d of NAS preparation. However the virus could be detected in other chickens without NAS preparation treatment. This result suggested that NAS preparation may be a potential drug candidate to control infection of H9N2 subtype AIV in chickens.