Prime number variant of concealed trigeminy

A 53-year-old man with myocardial infarction was found to have frequent premature ventricular beats. The predominant pattern was classical concealed trigeminy; i.e., the number of conducted sinus beats, S, between extrasystoles satisfied the equation S = 3n + 2, where "n" is zero or any positive integer. Two other transient patterns also occurred. The first one was characterized by exceptional values of S, which satisfied the equation S = 3n + 3. In the second transient pattern, all values of S fitted the classical equation, but there were singularly absent values; i.e., the "n" in the equation was exclusively an odd number, giving rise to only prime numbers of interectopic conducted sinus beats. It is proposed in this last form that there are two sites of fixed block proximal to a variable distal block in a re-entry loop responsible for the ventricular extrasystoles.     

经颈静脉肝内门体分流术并发症分析

笔者报告我院５０例应用ＴＩＰＳＳ方法治疗门脉高压症过程中，所遇到的较为严重的并发症，包括：急性心包填塞、肝动脉损伤、术后重度黄疸、肝性脑病、胆道出血各１例。其发生率为１０％。结合文献对其发生机制、预防方法及处理措施进行了讨论。     

波特鸭茅在云南省的引种研究

波特鸭茅具有耐寒，耐贫瘠，瘠，耐牧，适口性好，持久性强等优点，云南省不同气候种栽培结果表明，该品种在云南省北亚热带至中亚热带生长表现优二多年生黑麦草和苇状羊茅，在温带地区与多年和黑麦草和苇状羊茅相近，但持久性和耐盆瘠能力更强，在高寒地区生长和如猫尾草。适宜的推广种植范围为暖温带至中亚热带。     

A systematic review and meta-analysis of the aetiology of acute pancreatitis

Background

Gallstones and alcohol are currently the most frequent aetiologies of acute pancreatitis (AP). The aim of this study is to quantify these aetiologies worldwide, by geographic region and by diagnostic method.