Objective To explore the factors that could affect plasma level of D-dimmer test in acute aortic syn-drome. Methods Blood samples (2 mL) from acute aortic syndrome patients (n=76) obtained immediately after admission to detect D-dimmer using ELISA. Blood routine test and biochemical indicators tests including creatinine were also performed. White blood cell (WBC), serum value of creatinine, aortic contrast-enhanced CT, incidence of Shock and death were all re-corded. The receiver-operating characteristic curve (ROC) was established to assess the potency of D-dimmer to predict hospital mortality. Results According to ROC analysis, the optimal cut-off value of D-dimmer to predict hospital mortality was >2 988.6 μg/L (FEU), with 86.7% sensitivity and 70.5% specificity. The patients were divided into group A (D-dim-mer<2 988.6μg/L FEU, n=45) and group B (D-dimmer≥2 988.6μg/L FEU,n=31). Onset timing was longer in group A than that in group B(P<0.01). Involvement of ascending aorta was less common in group A than in group B(P<0.05). Aortic intramural hematoma was less common in group A than in group B(P<0.05). Logistic analysis demonstrated that short time of onset, involvement of ascending aorta, non-aortic intramural hematoma were all independent factors of higher D-dimmer (≥2 988.6μg/L FEU). Conclusion Patients with long time of onset, without involvement of ascending aorta, with intramural hematoma are liable to have lower values of plasma D-dimmer.

Objective:To explore the influence of depression on heart rate variability(HRV) and short term prognosis of patients with acute myocardial infarction(AMI).Methods:120 AMI patients were evaluated with Zung's self-rating depression scale within 24 hours after admission.The patients were divided into depressive group(45 cases) and non-depressive group(75 cases) according to depressive index.Post-infarction angina pectoris,reinfarction,heart failure and ventricular fibrillation as well as cardiac death were observed during 4 weeks.HRV analysis with 24-hour holter of survivals was perfomed in 1 week after infarction.Results:The prevalence of post-infarction angina pectoris,ventricular fibrillation and cardiac death in depressive group was remarkably elevated compared with non-depressive group(40.0% vs 22.7%,20.0% vs 6.7%,17.8% vs 4.0%,respectively. P

Objective To evaluate the effectiveness of renal sympathetic denervation (RDN) for hypertensive heart dis-ease combined with systolic heart failure. Methods Two patients (mean age 35 years) with hypertensive heart disease com-bined with systolic heart failure on maximal tolerated heart failure therapy underwent bilateral renal denervation. Echocar-diography, the six minute walk distance, renal function, glycosylated hemoglobin and NT-proBNP were assessed at baseline and 1 year after renal denervation. Results Renal artery angiography showed that no stenosis and dissection. After 1 year follow up, the left ventricular ejection fraction (LVEF), six minute walk distance and NT-proBNP were significantly im-proved, and the size of left ventricular decreased. Conclusion RDN is effective and feasible for the treatment in patients with hypertensive heart disease and systolic heart failure.

Object To develop an HPLC method for the determination of plasma level of ferulic acid and study the in vivo pharmacokinetics in rats. Methods The used analytical column was Nucleosil C_ 18 . The mobile phase was methanol-water-acetic acid (35∶65∶0.1). The flow rate was 1.0 mL/min and detection wavelength at 320 nm. Plasma samples were prepared for analysis by addition of internal standard (Tinidazole) followed by extracting with ethyl acetate. Results Linear caliration curve was obtained by plotting concentration vs peak area ratio over the rang 0.25—16.0 mg/L with a correlation coefficient of 0.999 2. The average recovery of ferulic acid was 96.9%—100.6%. The minimum detectable concentration of ferulic acid was 0.2 mg/L. The relative standard deviations for within-day and between-days were less than 3.0% and 5.3%,respectively. The plasma concentration-time curve of ferulic acid in Xinshu Oral Liquid ig given to rats was found to fit a two-compartments model with T_ 1/2? of 12.6 min and T_ 1/2? of 305 min. Conclusion The method is simple,rapid,accurate,and precise, which can be used for the determination of plasma level of ferulic acid and the study of its pharmacokinetics.

OBJECTIVE:To prepare the sterilized medical bone wax and to establish the standard of quality control.METHODS:The bone wax was identified with chemical approach and the quality of bone wax was evaluated by saponification value.RESULTS:The bone wax was appropriate in formula,feasible in preparing technique and satisfactory in therapeutic efficacy with a satisfication rate of 98%.CONCLUSION:There are no obvious differences between the bone wax developed by our hospital and imported bone wax in quality,therefore the prepared bone wax can take the place of imported products.

The epidemic of 2019 novel coronavirus, later named as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is still gradually spreading worldwide. The nucleic acid test or genetic sequencing serves as the gold standard method for confirmation of infection, yet several recent studies have reported false-negative results of real-time reverse-transcriptase polymerase chain reaction (rRT-PCR). Here, we report two representative false-negative cases and discuss the supplementary role of clinical data with rRT-PCR, including laboratory examination results and computed tomography features. Coinfection with SARS-COV-2 and other viruses has been discussed as well.