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   3175篇
  免费   181篇
  国内免费   23篇
耳鼻咽喉   15篇
儿科学   71篇
妇产科学   52篇
基础医学   504篇
口腔科学   70篇
临床医学   340篇
内科学   684篇
皮肤病学   41篇
神经病学   353篇
特种医学   97篇
外科学   334篇
综合类   21篇
预防医学   246篇
眼科学   43篇
药学   194篇
中国医学   3篇
肿瘤学   311篇
  2024年   8篇
  2023年   45篇
  2022年   58篇
  2021年   88篇
  2020年   70篇
  2019年   95篇
  2018年   94篇
  2017年   86篇
  2016年   88篇
  2015年   86篇
  2014年   155篇
  2013年   184篇
  2012年   234篇
  2011年   292篇
  2010年   152篇
  2009年   140篇
  2008年   252篇
  2007年   242篇
  2006年   191篇
  2005年   179篇
  2004年   131篇
  2003年   121篇
  2002年   95篇
  2001年   11篇
  2000年   14篇
  1999年   23篇
  1998年   24篇
  1997年   23篇
  1996年   19篇
  1995年   19篇
  1994年   14篇
  1993年   13篇
  1992年   12篇
  1991年   4篇
  1989年   3篇
  1988年   6篇
  1987年   11篇
  1986年   12篇
  1985年   6篇
  1984年   13篇
  1983年   7篇
  1982年   10篇
  1981年   4篇
  1979年   10篇
  1978年   3篇
  1977年   3篇
  1975年   3篇
  1969年   2篇
  1968年   2篇
  1955年   2篇
排序方式: 共有3379条查询结果,搜索用时 0 毫秒
41.
42.
43.
44.
45.

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   
46.
The COPD assessment test (CAT) is a short questionnaire designed to assess the impairment in health status of COPD patients. We aimed to determine the change of the CAT in COPD patients after 1 year of treatment and test the association between the score and clinical and lung function variables. Methods A cohort of 111 newly diagnosed COPD patients in primary care was evaluated at baseline and one year after the implementation of the recommended treatment according to the Global Initiative for the management of COPD (GOLD). Results Most of the patients (82%) were diagnosed with mild to moderate airflow limitation (mean FEV1 72 ± 21.5% predicted) and the CAT score increased in proportion with the GOLD stage of severity. The CAT significantly correlated with the number of exacerbations, visits to general practitioners and days of hospitalization both at the beginning and at 1 year follow-up. A strong negative correlation between the CAT score and FEV1 predicted was also observed. The CAT was responsive to the application of treatment with a significant improvement in the mean score (95% confidence interval) following 12 months of treatment by –2.4 (–2.9, –1.9) despite the small decline in lung function indices. The number of exacerbations in the preceding year and FEV1 were independent predictors of the CAT score in the general linear model. Conclusion The CAT questionnaire may serve as a simple, measurable tool complementary to spirometry in the assessment of severity and of response to treatment in unselected COPD patients in primary care.  相似文献   
47.
Abstract

The central role of spouses/partners in patients’ adaptation to cancer is well-established, but few studies have examined how partners facilitate adaptation. The Common Sense Model posits that a representation of illness as more controllable and less threatening promotes adaptive coping, but this has not been examined in a dyadic context. This cross-sectional study examined the relations of spouse illness representations of personal and treatment control, and emotional representations to recently diagnosed cancer patients’ coping behaviors, through patient illness representations. One hundred forty-nine heterosexual couples (39.60% female patients; 77.18% dealing with early stage cancer) participated in the study. Structural Equation Modeling showed that spouse illness representations were related to patient coping directly and indirectly through patient illness representations. Both partners’ representations of control were related to greater patient adaptive coping, and both partners’ emotional representations were related to greater dysfunctional coping. These findings highlight the importance of partner illness representations in patients’ adaptation to cancer. They also suggest that early intervention programs that address both partners’ illness representations may enhance patients’ adaptation to cancer.  相似文献   
48.
49.
50.
Asian American women's historically low breast cancer mortality rate has remained constant as rates decreased for all other races. From 2000 to 2004, a randomized controlled trial explored the Asian grocery store-based breast cancer education program's impact on Chinese, Filipino, Korean, and Vietnamese women (n?=?1,540). Women aged 40 and older and non-adherent for annual screening mammograms were more likely to schedule a mammogram after receiving the breast cancer education program than women randomized to the prostate cancer program (X 2?=?3.85, p?=?0.05). With the right program ingredients, late adopters of breast cancer screening can be prompted to change.  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