全文获取类型
收费全文 | 95篇 |
免费 | 5篇 |
专业分类
耳鼻咽喉 | 9篇 |
儿科学 | 4篇 |
妇产科学 | 2篇 |
基础医学 | 12篇 |
口腔科学 | 1篇 |
临床医学 | 23篇 |
内科学 | 20篇 |
神经病学 | 1篇 |
特种医学 | 1篇 |
外科学 | 13篇 |
综合类 | 2篇 |
预防医学 | 6篇 |
药学 | 3篇 |
肿瘤学 | 3篇 |
出版年
2022年 | 1篇 |
2021年 | 2篇 |
2017年 | 1篇 |
2016年 | 1篇 |
2015年 | 3篇 |
2014年 | 5篇 |
2013年 | 1篇 |
2012年 | 1篇 |
2011年 | 2篇 |
2010年 | 2篇 |
2009年 | 2篇 |
2008年 | 1篇 |
2007年 | 1篇 |
2006年 | 2篇 |
2005年 | 2篇 |
2003年 | 1篇 |
2001年 | 3篇 |
2000年 | 1篇 |
1999年 | 2篇 |
1998年 | 2篇 |
1997年 | 1篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1990年 | 3篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1987年 | 1篇 |
1984年 | 1篇 |
1982年 | 1篇 |
1980年 | 2篇 |
1978年 | 1篇 |
1963年 | 1篇 |
1959年 | 3篇 |
1958年 | 5篇 |
1957年 | 8篇 |
1956年 | 12篇 |
1955年 | 4篇 |
1954年 | 6篇 |
1949年 | 2篇 |
1948年 | 3篇 |
排序方式: 共有100条查询结果,搜索用时 46 毫秒
1.
2.
ADEL ISSA SOUSSOU MOHAMED GAMAL HELMY RAMEZ RAOUF GUINDY ENRICO MARIA GRECO 《Pacing and clinical electrophysiology : PACE》1992,15(11):1804-1808
The pocing rate response of a new acceleration driven pulse generator (SWING 100, SORIN BIOMEDICA) was compared with simultaneous normal sinus rhythm (NSR) during two different treadmill exercises. This pacemaker has a gravitational acceleration sensor able to discriminate between physical activities and vibrations. Six healthy volunteers (three male, three female; aged 21.7 ± 4,3 years), with the pacemaker strapped to their right infraclavicular area, performed each test three times with different rise response curve (RRC) each time: fast, normal, and slow. The fall response curve used was the same as the rising one during each test. Pacing rates were recorded using the VEGA analyzer (SORIN BIOMEDICA) and compared with simultaneous NSR recorded by a 7-channel ECG recorder (MINGOGRAF 7, SIEMENS), During all tests immediate (within seconds) rapid increase in pacemaker rate was seen up to about 60 seconds, then a slower increase followed thereafter. The mean correlation between pacing rates and NSR during the Bruce tests were 0.7941 ± 0.10, 0.8562 ± 0.14, and 0.8292 ± 0.07; during the discontinous tests 0.7292 ± 0.16, 0.7233 ± 0.10, and 0.7480 ± 0.11 for fast, normal, and slow RRC, respectively. Each 30 seconds, nonsignificant differences were present between pacing rate and NSR during all the discontinuous tests; similar responses were observed only during the first two stages of Bruce tests after which NSR was significantly higher than pacemaker rates. The speed of rise to upper rate was the main difference between the different programs (fast, normal, and slow). The discontinuous tests showed that the pacemaker responds more to speed than to grade. In conclusion, the Swing pacemaker is easy to use and program, fast, reliable, and is able to mimic the normal sinus behavior especially during discontinuous activities. 相似文献
3.
4.
HEATHER K. SPENCE LASCHINGER RN PhD PIOTR WILK PhD JULIA CHO RN MScN PAULA GRECO RN MScN 《Journal of nursing management》2009,17(5):636-646
Aims We examined the impact of empowering work conditions on nurses' work engagement and effectiveness, and compared differences among these relationships in new graduates and experienced nurses.
Background As many nurses near retirement, every effort is needed to retain nurses and to ensure that work environments are attractive to new nurses. Experience in the profession and generational differences may affect how important work factors interact to affect work behaviours.
Methods We conducted a secondary analysis of survey data from two studies and compared the pattern of relationships among study variables in two groups: 185 nurses 2 years post-graduation and 294 nurses with more than 2 years of experience.
Results A multi-group SEM analysis indicated a good fit of the hypothesized model. Work engagement significantly mediated the empowerment/effectiveness relationship in both groups, although the impact of engagement on work effectiveness was significantly stronger for experienced nurses.
Conclusions Engagement is an important mechanism by which empowerment affects nurses feelings of effectiveness but less important to new graduates' feelings of work effectiveness than empowerment.
Implications for nursing management Managers must be aware of the role of empowerment in promoting work engagement and effectiveness and differential effects on new graduates and more seasoned nurses. 相似文献
Background As many nurses near retirement, every effort is needed to retain nurses and to ensure that work environments are attractive to new nurses. Experience in the profession and generational differences may affect how important work factors interact to affect work behaviours.
Methods We conducted a secondary analysis of survey data from two studies and compared the pattern of relationships among study variables in two groups: 185 nurses 2 years post-graduation and 294 nurses with more than 2 years of experience.
Results A multi-group SEM analysis indicated a good fit of the hypothesized model. Work engagement significantly mediated the empowerment/effectiveness relationship in both groups, although the impact of engagement on work effectiveness was significantly stronger for experienced nurses.
Conclusions Engagement is an important mechanism by which empowerment affects nurses feelings of effectiveness but less important to new graduates' feelings of work effectiveness than empowerment.
Implications for nursing management Managers must be aware of the role of empowerment in promoting work engagement and effectiveness and differential effects on new graduates and more seasoned nurses. 相似文献
5.
GIUSEPPE CRITELLI M.D. CESARE GRECO M.D. MARIA AMBROSINI M.D. RICCARDO SINATRA M.D. BENEDETTO MARINO M.D. ATTILIO REALE M.D. 《Journal of cardiovascular electrophysiology》1990,1(4):330-333
The occurrence of inappropriate discharge from an implanted cardioverter-defibrillator is reported. The device was triggered by an episode of induced nonsustained ventricular tachycardia, and the shock was delivered 10 sec after spontaneous termination of the arrhythmia.
This observation demonstrates that unexpected discharges from an implanted cardiaverter/defibrillator can occur while the patient is asymptomatic. In order to avoid such an adverse effect, improvement of the detection system of the device is advisable. 相似文献
This observation demonstrates that unexpected discharges from an implanted cardiaverter/defibrillator can occur while the patient is asymptomatic. In order to avoid such an adverse effect, improvement of the detection system of the device is advisable. 相似文献
6.
7.
PIETRO TURCO ANTONIO DE SIMONE† VINCENZO LA ROCCA† BILAL EL JAMAL PASQUALE NOCERINO† COSTANTINO ASTARITA‡ CARMINE DE MATTEIS£ VINCENZO MESSINA§ LUCIANO GRECO RAFFAELE ROTUNNO†† TOMMASO DI NAPOLI‡‡ DINO FRANCO VITALE££ GIUSEPPE STABILE† 《Pacing and clinical electrophysiology : PACE》2005,28(S1):S124-S127
The flecainide infusion test has been proposed to screen candidates for hybrid pharmacological and ablation therapy. We report the long-term follow-up of 154 consecutive patients with paroxysmal or persistent atrial fibrillation (AF) who developed atrial flutter (AFL) during flecainide infusion (IC AFL), treated with inferior vena cava-tricuspid annulus isthmus catheter ablation and oral flecainide (hybrid therapy). Over a mean of 54.1 ± 13.1 months 82 patients (53%) remained free of AF and AFL. Flecainide was discontinued because of adverse effects in 6 patients (4%). A history of persistent AF, and the documentation of ≥1 spontaneous AFL episode before the flecainide test were independent predictors of successful hybrid therapy. In patients with paroxysmal AF without documented spontaneous AFL, the long-term efficacy of hybrid therapy was 38.5% (P = 0.03). The flecainide infusion test reliably detects candidates for hybrid therapy. The efficacy of this therapy is maintained over the long-term with a high patient compliance. 相似文献
8.
9.
Autonomic Nervous System Controlled Closed Loop Cardiac Pacing 总被引:4,自引:0,他引:4
A.M. PICHLMAIER D. BRAILE E. EBNER O.T. GRECO H. HUTTEN G.H. von KNORRE W. NIEDERLAG W. RENTSCH H. VOLKMANN D. WEBER E. WUNDERLICH M. SCHALDACH 《Pacing and clinical electrophysiology : PACE》1992,15(11):1787-1791
A multicenter clinical study is presented, which focuses on the reestablishment of closed loop cardiac control in patients with chronotropic insufficiency. Using the information about sympathetic tone contained in the myocardial contractility, it is possible to reconnect the heart rate to the physiological control mechanisms. Intracardiac impedance is measured with the ventricular electrode and the ventricular inotropic parameter (VIP) is derived from that. The VIP serves directly as input to the control of heart rate by the pacemaker. Over 200 patients have received autonomic nervous system (ANS) controlled pacemakers. The patientpacemaker system was investigated in different ways. This included standard exercise tests, long-term studies of every day activities over 24 hours, psychological, and pharmacological challenges. To prove the validity of the approach we specifically looked at (1) the appropriateness of changes in paced heart rate with sympathetic tone during exercise, (2) the correlation between heart rate and sinus rate, if detectable, and (3) the correlation between the echocardiographically determined preejection period (PEP) and the VIP controlled heart rate. 相似文献
10.