全文获取类型
收费全文 | 11640篇 |
免费 | 535篇 |
国内免费 | 272篇 |
专业分类
耳鼻咽喉 | 51篇 |
儿科学 | 229篇 |
妇产科学 | 276篇 |
基础医学 | 1668篇 |
口腔科学 | 124篇 |
临床医学 | 1188篇 |
内科学 | 1380篇 |
皮肤病学 | 118篇 |
神经病学 | 2407篇 |
特种医学 | 832篇 |
外科学 | 1431篇 |
综合类 | 1217篇 |
现状与发展 | 1篇 |
预防医学 | 365篇 |
眼科学 | 74篇 |
药学 | 796篇 |
5篇 | |
中国医学 | 146篇 |
肿瘤学 | 139篇 |
出版年
2023年 | 101篇 |
2022年 | 196篇 |
2021年 | 312篇 |
2020年 | 300篇 |
2019年 | 436篇 |
2018年 | 427篇 |
2017年 | 296篇 |
2016年 | 227篇 |
2015年 | 238篇 |
2014年 | 498篇 |
2013年 | 565篇 |
2012年 | 492篇 |
2011年 | 573篇 |
2010年 | 554篇 |
2009年 | 496篇 |
2008年 | 536篇 |
2007年 | 536篇 |
2006年 | 526篇 |
2005年 | 419篇 |
2004年 | 319篇 |
2003年 | 306篇 |
2002年 | 275篇 |
2001年 | 238篇 |
2000年 | 221篇 |
1999年 | 184篇 |
1998年 | 239篇 |
1997年 | 188篇 |
1996年 | 186篇 |
1995年 | 181篇 |
1994年 | 130篇 |
1993年 | 129篇 |
1992年 | 108篇 |
1991年 | 101篇 |
1990年 | 88篇 |
1989年 | 70篇 |
1988年 | 89篇 |
1987年 | 75篇 |
1986年 | 101篇 |
1985年 | 229篇 |
1984年 | 236篇 |
1983年 | 177篇 |
1982年 | 171篇 |
1981年 | 145篇 |
1980年 | 140篇 |
1979年 | 89篇 |
1978年 | 67篇 |
1977年 | 50篇 |
1976年 | 42篇 |
1975年 | 46篇 |
1973年 | 38篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Wojciech Szychta M.D. Ph.D. Gheorghe Cerin M.D. Ph.D. F.E.S.C. Bogdan Adrian Popa M.D. Armienti Felice M.D. Guido Lanzillo M.D. Ph.D. Marco Diena M.D. Grzegorz Opolski M.D. Ph.D. F.E.S.C. 《Echocardiography (Mount Kisco, N.Y.)》2015,32(6):1040-1043
Sinus venosus atrial septal defect (SV‐ASD) usually coexists with partial anomalous pulmonary vein connection (PAPVC). It is a difficult diagnosis in transthoracic echocardiography (TTE) due to eccentric position of defects. We present a rare case of atypical anatomical variation in PAPVC, which was never described before. Two right pulmonary veins drained into superior vena cava, which overrode SV‐ASD and interatrial septum, a third pulmonary vein into the right atrium. Complete diagnosis could not be set after TTE, nor transesophageal echocardiography, whereas angio‐CT was finally conclusive. This diagnostic approach allowed the surgical planning. 相似文献
2.
《Diagnostic and interventional imaging》2020,101(6):335-345
This article was designed to provide a pediatric cardiac computed tomography angiography (CCTA) expert panel consensus based on opinions of experts of the Société Française d’Imagerie Cardiaque et Vasculaire diagnostique et interventionnelle (SFICV) and of the Filiale de Cardiologie Pédiatrique Congénitale (FCPC). This expert panel consensus includes recommendations for indications, patient preparation, CTA radiation dose reduction techniques, and post-processing techniques. The consensus was based on data from available literature (original papers, reviews and guidelines) and on opinions of a group of specialists with extensive experience in the use of CT imaging in congenital heart disease. In order to reach high potential and avoid pitfalls, CCTA in children with congenital heart disease requires training and experience. Moreover, pediatric cardiac CCTA protocols should be standardized to acquire optimal images in this population with the lowest radiation dose possible to prevent unnecessary radiation exposure. We also provided a suggested structured report and a list of acquisition protocols and technical parameters in relation to specific vendors. 相似文献
3.
4.
Alexander C. Egbe Rosalyn Adigun Vidhu Anand Collin P. West Victor M. Montori Hassan M. Murad Emmanuel Akintoye Karim Osman Heidi M. Connolly 《The Canadian journal of cardiology》2019,35(12):1784-1790
BackgroundAlthough there are robust data about the pathophysiology and prognostic implications of left ventricular (LV) systolic dysfunction in patients with acquired heart disease, similar prognostic data about LV systolic dysfunction are sparse in the tetralogy of Fallot (TOF) population. The purpose of this study was to perform a meta-analysis of all studies that assessed the relationship between LV ejection fraction (LVEF) and cardiovascular adverse events (CAEs) defined as death, aborted sudden death, or sustained ventricular tachycardia.MethodsWe used random-effects models to calculate hazard ratios (HRs) and 95% confidence intervals (CIs).ResultsOf the 1,809 citations, 7 studies with 2,854 patients (age 28 ± 4 years) were included. During 5.6 ± 3.4 years' follow-up, there were 82 deaths, 17 aborted sudden cardiac deaths, and 56 sustained ventricular tachycardia events. Overall, CAEs occurred in 5.1% (144 patients). As a continuous variable, LVEF was a predictor of CAE (HR 1.29, 95% CI, 1.09-1.53, P = 0.001) per 5% decrease in LVEF. Similarly, LVEF < 40% was also a predictor of CAE (HR 3.22, 95% CI, 2.16-4.80, P < 0.001).ConclusionsLV systolic dysfunction was an independent predictor of CAE, and we observed a 30% increase in the risk of CAE for every 5% decrease in LVEF, and a 3-fold increase in the risk of CAE in patients with LVEF <40% compared with other patients. These findings underscore the importance of incorporating LV systolic function in clinical risk stratification of patients with TOF and the need to explore new treatment options to address this problem. 相似文献
5.
6.
7.
目的探讨针刺京骨穴联合推拿治疗背肌筋膜炎的临床疗效。方法将2016年10月—2018年10月收治的背肌筋膜炎患者86例纳入研究,采用随机数字表法分组。对照组43例予以推拿治疗,观察组43例予以针刺京骨穴联合推拿治疗。比较2组患者的治疗总有效率、VAS评分及Oswestry功能障碍指数、痊愈所用时间。结果观察组治疗总有效率为95.3%,而对照组仅为81.4%,差异有统计学意义(P<0.05);2组治疗后VAS评分、Oswestry功能障碍指数均有下降,观察组上述指标低于对照组,差异有统计学意义(P<0.05);观察组痊愈所用时间短于对照组,差异有统计学意义(P<0.05)。结论针刺京骨穴联合推拿治疗背肌筋膜炎的临床疗效突出,可缓解背部疼痛、恢复功能活动,并缩短了愈合时间,提高了生活质量,值得一定的临床推广。 相似文献
8.
9.
《Journal de gynecologie, obstetrique et biologie de la reproduction》2015,44(5):411-418
10.