首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   7568篇
  免费   467篇
  国内免费   28篇
耳鼻咽喉   84篇
儿科学   233篇
妇产科学   240篇
基础医学   1250篇
口腔科学   230篇
临床医学   749篇
内科学   1654篇
皮肤病学   185篇
神经病学   696篇
特种医学   150篇
外科学   667篇
综合类   49篇
一般理论   5篇
预防医学   686篇
眼科学   104篇
药学   498篇
中国医学   12篇
肿瘤学   571篇
  2024年   18篇
  2023年   64篇
  2022年   152篇
  2021年   289篇
  2020年   167篇
  2019年   234篇
  2018年   246篇
  2017年   206篇
  2016年   229篇
  2015年   238篇
  2014年   274篇
  2013年   405篇
  2012年   646篇
  2011年   600篇
  2010年   343篇
  2009年   291篇
  2008年   532篇
  2007年   542篇
  2006年   485篇
  2005年   519篇
  2004年   397篇
  2003年   370篇
  2002年   321篇
  2001年   36篇
  2000年   29篇
  1999年   46篇
  1998年   49篇
  1997年   43篇
  1996年   43篇
  1995年   40篇
  1994年   30篇
  1993年   33篇
  1992年   20篇
  1991年   19篇
  1990年   12篇
  1989年   8篇
  1988年   8篇
  1987年   6篇
  1986年   5篇
  1985年   11篇
  1984年   6篇
  1983年   9篇
  1982年   7篇
  1981年   4篇
  1980年   9篇
  1978年   3篇
  1972年   2篇
  1971年   2篇
  1970年   2篇
  1947年   2篇
排序方式: 共有8063条查询结果,搜索用时 15 毫秒
71.

Background

Information on young patients with Brugada syndrome (BrS) and arrhythmic events (AEs) is limited.

Objectives

The purpose of this study was to describe their characteristics and management as well as risk factors for AE recurrence.

Methods

A total of 57 patients (age ≤20 years), all with BrS and AEs, were divided into pediatric (age ≤12 years; n = 26) and adolescents (age 13 to 20 years; n = 31).

Results

Patients’ median age at time of first AE was 14 years, with a majority of males (74%), Caucasians (70%), and probands (79%) who presented as aborted cardiac arrest (84%). A significant proportion of patients (28%) exhibited fever-related AE. Family history of sudden cardiac death (SCD), prior syncope, spontaneous type 1 Brugada electrocardiogram (ECG), inducible ventricular fibrillation at electrophysiological study, and SCN5A mutations were present in 26%, 49%, 65%, 28%, and 58% of patients, respectively. The pediatric group differed from the adolescents, with a greater proportion of females, Caucasians, fever-related AEs, and spontaneous type-1 ECG. During follow-up, 68% of pediatric and 64% of adolescents had recurrent AE, with median time of 9.9 and 27.0 months, respectively. Approximately one-third of recurrent AEs occurred on quinidine therapy, and among the pediatric group, 60% of recurrent AEs were fever-related. Risk factors for recurrent AE included sinus node dysfunction, atrial arrhythmias, intraventricular conduction delay, or large S-wave on ECG lead I in the pediatric group and the presence of SCN5A mutation among adolescents.

Conclusions

Young BrS patients with AE represent a very arrhythmogenic group. Current management after first arrhythmia episode is associated with high recurrence rate. Alternative therapies, besides defibrillator implantation, should be considered.  相似文献   
72.
73.
74.
75.
76.
77.
78.
79.
Metabolic Brain Disease - Aicardi-Goutières Syndrome (AGS) is a monogenic leukodystrophy with pediatric onset, clinically characterized by a variable degree of neurologic impairment. It...  相似文献   
80.
Radio-isotopic techniques may be useful in diagnosis and staging of chronic diffuse liver diseases. Liver angioscintigraphy (LAS) and per-rectal portal scintigraphy (PRPS) are at well discriminating portal hypertension (PHT), very early cirrhosis hemodynamic failure and compensatory arterialisation of liver perfusion. Supplied information is related to PHT, liver morphology and mesenchimal activity in liver, spleen and bone marrow. Correlation of LAS and PRPS may diagnose installing of PHT earlier than any actual morphologic imagistic method. Our experience (after more than 300 PRPS and 500 LAS) suggests that PHT and portal-cave shunts (PCS) may be classified in five functional stages. These five patterns (types) are characteristic for portal dynamics, supporting disease staging and follow-up of evolution to cirrhosis. All five dynamics may be assessed by PRPS and LAS. Scintigraphic techniques also explore portal thromboses, perfusion differences between the lobes of cirrhotic liver, betablockers effect in PHT, earliest stages of PHT, malignant tumours occurring on cirrhosis, the different characteristics of alcoholic liver comparing to viral etiology.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号