全文获取类型
收费全文 | 967篇 |
免费 | 66篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 20篇 |
儿科学 | 37篇 |
妇产科学 | 5篇 |
基础医学 | 81篇 |
口腔科学 | 25篇 |
临床医学 | 97篇 |
内科学 | 219篇 |
皮肤病学 | 7篇 |
神经病学 | 70篇 |
特种医学 | 41篇 |
外科学 | 198篇 |
综合类 | 11篇 |
一般理论 | 1篇 |
预防医学 | 34篇 |
眼科学 | 28篇 |
药学 | 87篇 |
中国医学 | 2篇 |
肿瘤学 | 75篇 |
出版年
2024年 | 4篇 |
2023年 | 14篇 |
2022年 | 42篇 |
2021年 | 89篇 |
2020年 | 52篇 |
2019年 | 51篇 |
2018年 | 63篇 |
2017年 | 36篇 |
2016年 | 38篇 |
2015年 | 39篇 |
2014年 | 56篇 |
2013年 | 61篇 |
2012年 | 98篇 |
2011年 | 86篇 |
2010年 | 39篇 |
2009年 | 30篇 |
2008年 | 47篇 |
2007年 | 50篇 |
2006年 | 44篇 |
2005年 | 34篇 |
2004年 | 26篇 |
2003年 | 19篇 |
2002年 | 11篇 |
2001年 | 2篇 |
1999年 | 3篇 |
1998年 | 3篇 |
1997年 | 1篇 |
排序方式: 共有1038条查询结果,搜索用时 15 毫秒
11.
12.
13.
Lukasz M. Mazur Robert Adams Prithima R. Mosaly Joseph Nuamah Karthik Adapa Lawrence B. Marks 《Practical radiation oncology》2021,11(2):e124-e133
PurposeOur purpose was to assess the effect of a combined intervention – simulation-based training supported by neurofeedback sessions – on radiation technologists’ (RTs’) workload, situation awareness, and performance during routine quality assurance and treatment delivery tasks.Methods and MaterialsAs part of a prospective institutional review board approved study, 32 RTs previously randomized to receive versus not receive simulation-based training focused on patient safety were again randomized to receive versus not receive a 3-week neurofeedback intervention (8 sessions of alpha-theta protocol) focused on stress reduction as well as conscious precision, strong focus, and ability to solve arising problems. Perceived workload was quantified using the NASA Task Load Index. Situation awareness was quantified using the situation awareness rating technique. Performance score was calculated using procedural compliance with time-out components and error detection.ResultsRTs randomized to simulation-based training followed by neurofeedback sessions demonstrated no significant changes in perceived workload or situation awareness scores, but did have better performance compared with other study groups (P < .01).ConclusionsThis finding is encouraging and provides basis for using neurofeedback as means to possibly augment performance improvements gained during simulation-based training. 相似文献
14.
Kelly M. MacArthur MD Brian C. Baumann MD Joseph F. Sobanko MD Jeremy R. Etzkorn MD MS Thuzar M. Shin MD PhD H. William Higgins nd MD MBE Cerrene N. Giordano MD Stacy L. McMurray MD Aimee Krausz MD Jason G. Newman MD Karthik Rajasekaran MD Steven B. Cannady MD Robert M. Brody MD Giorgos C. Karakousis MD John T. Miura MD Justine V. Cohen DO Ravi K. Amaravadi MD Tara C. Mitchell MD Lynn M. Schuchter MD Christopher J. Miller MD 《Cancer》2021,127(19):3591-3598
15.
Latent myopathy is more pronounced in patients with low flow versus normal flow aortic stenosis with normal left ventricular ejection fraction who are undergoing surgical aortic valve replacement: Multicenter study with a brief review of the literature
下载免费PDF全文
![点击此处可从《Echocardiography (Mount Kisco, N.Y.)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
16.
17.
Hamdan MH Barbera S Kowal RC Page RL Ramaswamy K Joglar JA Karimkhani V Smith ML 《The American journal of cardiology》2002,89(9):1047-1051
This study assesses the effect of biventricular pacing on sympathetic nerve activity (SNA) in patients with depressed ejection fraction and intraventricular conduction delay (IVCD). Biventricular pacing has been shown to result in hemodynamic improvement in patients with depressed ejection fraction and IVCD. The effect of biventricular pacing on SNA, however, remains unclear. A total of 15 men with a mean ejection fraction of 25 +/- 4% were enrolled. Arterial pressure, central venous pressure and SNA were recorded during 3 minutes of right atrial (RA) pacing and RA-biventricular pacing. Pacing was performed at a rate 5 to 10 beats faster than sinus rhythm, with an atrioventricular interval equal to 100 ms during RA-biventricular pacing. RA-biventricular pacing resulted in greater arterial pressures (p <0.05) than RA pacing (146 +/- 15/83 +/- 11 vs 141 +/- 15/80 +/- 10 mm Hg). There were no differences in central venous pressures between the 2 pacing modes (p = 0.76). SNA was significantly less during RA-biventricular pacing (727 +/- 242 U) than during RA pacing (833 +/- 332 U) (p <0.02). Furthermore, there was a positive correlation between baseline QRS duration and the decrease in SNA noted with RA-biventricular pacing (r = 0.58, p = 0.03). Biventricular pacing results in improved hemodynamics and a decrease in SNA compared with intrinsic conduction in patients with left ventricular dysfunction and IVCD. If the current findings are also present with chronic biventricular pacing, then this form of therapy may have a positive impact on mortality. 相似文献
18.
19.
20.