Objective:To explore the characteristics of original site of premature ventricular contraction (PVC) in pa‐tiets with acute myocardial infarction (AMI) .Methods:Among ECG‐detected single‐source PVC patients ,a total of 150 idiopathic PVC patients and 150 AMI patients were randomly selected as control group and AMI group respec‐tively .Original sites of PVC was compared between AMI group and control group and between left and right ventri‐cle of AMI group ,and the relationship between original sites of PVC and diseased coronary in AMI patients was an‐alyzed .Results:Compared with control group ,there was significant rise in percentage of PVC originated from left ventricular apex (6.0% vs .46.0% ) ,and significant reductions in percentages of PVC originated from right ventric‐ular outflow tract (54.7% vs .27.3% ) and right ventricular anterior wall (10.0% vs .3.3% ) in AMI group , P<0.05 or <0.01. In AMI group ,compared with PVC originated from right ventricular outflow tract ,there was sig‐nificant rise in incidence rate of PVC originated from left ventricular apex (27.3% vs .46.0% ) , P=0.001 ;com‐pared with right ventricle , there was significant reduction in incidence rate of outflow tract PVC (66.1% vs . 13.6% ) ,and significant rise in incidence rate of apex PVC (24.4% vs .78.4% ) in left ventricle , P<0.01 both . Relevance test analysis of two‐way disordered classified data indicated that diseased coronary was not related to orig‐inal sites of PVC in AMI patients (χ2 =0.519 ,P=0.134) .Conclusion:Original sites of premature ventricular con‐traction has its own characteristics in patients with acute myocardial infarction ,which may possess certain guidance significance for its treatment .

Objective To investigate the clinical status about the utility of compound amino acid (15) and dipeptides (2) in-jection, and to promote the rational drug use in our hospital .Methods Data from 127 patients who used compound amino acid (15) and dipeptides(2) injection in surgical wards were collected in July 2012.The data about the drug usage method , duration, administra-ted timing, drug combination and the differences in all departments was analyzed .Results Existing problems:62.2% patients used compound amino acid (15) and dipeptides (2) injection by peripheral intravenous infusion , 6.3% patients used more than 14 days and 7.1%patients infused singly.Conclusion Compound amino acid(15) and dipeptides(2) injection had problems of off-label drug use in surgical ward , which need to be improved .