全文获取类型
收费全文 | 171篇 |
免费 | 0篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 21篇 |
妇产科学 | 1篇 |
基础医学 | 2篇 |
口腔科学 | 2篇 |
临床医学 | 2篇 |
内科学 | 80篇 |
神经病学 | 8篇 |
特种医学 | 13篇 |
外科学 | 32篇 |
预防医学 | 1篇 |
眼科学 | 3篇 |
肿瘤学 | 4篇 |
出版年
2021年 | 2篇 |
2019年 | 8篇 |
2018年 | 8篇 |
2017年 | 7篇 |
1993年 | 1篇 |
1985年 | 5篇 |
1984年 | 14篇 |
1983年 | 15篇 |
1982年 | 7篇 |
1981年 | 13篇 |
1980年 | 9篇 |
1979年 | 15篇 |
1978年 | 14篇 |
1977年 | 12篇 |
1976年 | 11篇 |
1975年 | 7篇 |
1974年 | 10篇 |
1973年 | 13篇 |
排序方式: 共有171条查询结果,搜索用时 7 毫秒
1.
2.
Single-chamber atrial pacing is effective in the management of sinus node dysfunction, subject to the uncertainty of long-term atrioventricular conduction. Despite the accepted observation that many patients with sinus node dysfunction also have atrioventricular conduction disease, data do not exist on the development of atrioventricular block in those patients with permanent single-chamber atrial pacing. Of 70 patients who received single-chamber atrial pacing from 1967 to 1982 (mean duration of pacing was 33 months), only two patients of 58 (3.4%) of those with sinus node dysfunction developed atrioventricular (AV) block—after 14 months in one patient and after 23 months of successful atrial pacing in the other. None of the 12 patients paced for tachyarrhythmia management developed AV block. Of the 70 patients, 37 had assessment of AV conduction by incremental atrial pacing at the time of implant and 20 patients underwent atrial pacing on the basis of surface ECG and clinical judgment. Electrophysiologic studies were conducted only in those patients being paced for control of supraventricular arrhythmias. Only 5 of the 70 patients required conversion to ventricular pacing for technical difficulties; three of these conversions occurred in the early 1970's before the advent of atrial tined or J leads; one was for irreparable lead fracture and only one occurred in a patient with a newer design atrial lead. In conclusion, progression to AV block in patients with permanent atrial pacing is uncommon; formal electrophysiologic studies are necessary mainly in patients with supraventricular arrhythmias; and in the majority of patients, AV conduction can be assessed at the time of implant. Continued improvement in atrial leads should make atrial pacing even more successful. 相似文献
3.
L R Zohman 《American heart journal》1973,85(5):706-710
Comprehensive cardiac rehabilitation is not for every patient, but rather for those who require more than the services of a physician and a nurse. The services which eventually are required may be provided simply in some cases by paramedical persons and in the more complicated cases by an experienced multidisciplinary team. The main evaluative expertise of cardiac rehabilitation specialists is the functional evaluation of the patient—that is, the physical, psychological, social, and vocational functioning by a variety of specialized techniques. The major therapeutic recommendation is usually endurance-building exercise training for secondary prevention. The educational and supportive aspects of the rehabilitation process may make the difference between non-limiting impairment and disability. 相似文献
4.
Bursts of rapid ventricular pacing used during 573 episodes of ventricular tachycardia in 23 patients terminated 5 12 episodes (89 percent), with burst rates averaging 56 beats/min above the ventricular tachycardia rate, for 5 to 10 captures. Tachycardia was accelerated by pacing bursts to rates below 300 beats/min in 16 episodes (3 percent); 10 of these terminated spontaneously or responded to further bursts. Acceleration of heart rate to more than 300 beats/min or ventricular fibrillation occurred six times (1 percent), each episode requiring direct current cardioversion. Pacing bursts had no effect in 38 instances (7 percent), mostly in patients with terminal cardiogenic shock. Implantable pacemakers delivering bursts of rapid ventricular pacing were placed in two patients who have used these units at home. No deaths were associated with bursts of rapid ventricular pacing, which is an effective, rapid, pleasant alternative to repeated direct current cardioversion and a useful tool during electrophysiologic testing in patients with recurrent tachycardia. 相似文献
5.
6.
7.
8.
9.
J F Rosen A R Fleischman L Finberg A Hamstra H F DeLuca 《The Journal of pediatrics》1979,94(5):729-735
Rickets with alopecia, an inborn error of vitamin D metabolism, is described in two sisters. The rachitic disorder began during the first year of life and was refractory to 50,000 IU of vitamin D2/day. Surprisingly, both children had marked elevations in serum concentrations of 1,25-(OH)2D. Although the molecular basis for this disorder is not evident to date, intestinal end-organ unresponsiveness to exceedingly high levels of 1,25-(OH)2D was present, in addition to hyporesponsiveness of bone to these high levels of the hormone, since normocalcemia was maintained despite elevated serum levels of PTH. Therapy with oral 1,25-(OH)2D3 failed to reverse the disorder, but oral phosphorus supplements resulted in significant radiographic and clinical improvement. 相似文献
10.