Writing the Scientific Abstract - AuthorAID科学的抽象authoraid写作.pptVIP

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Writing the Scientific Abstract - AuthorAID科学的抽象authoraid写作.ppt

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Writing the Scientific Abstract - AuthorAID科学的抽象authoraid写作

Structured Abstracts Also called “more informative” abstracts Purposes: Help readers quickly judge the findings of a study Guide authors into better summaries Aid reviewers Facilitate electronic searches (eg, MEDLINE) Include headings May use incomplete sentences Follow journal requirements Written after the paper has been written Structured Abstracts Background—Dual-chamber (atrioventricular) and single-chamber (ventricular) pacing are alternative treatment approaches for sinus-node dysfunction that causes clinically significant bradycardia. However, it is unknown which type of pacing results in the better outcome. Methods—We randomly assigned a total of 2010 patients with sinus-node dysfunction to dual-chamber pacing (1014 patients) or ventricular pacing (996 patients) and followed them for a median of 33.1 months. The primary end point was death from any cause or nonfatal stroke. Secondary end points included the composite of death, stroke, or hospitalization for heart failure; atrial fibrillation; heart-failure score; the pacemaker syndrome; and the quality of life. Example: cont. Structured Abstracts Results—The incidence of the primary end point did not differ significantly between the dual-chamber group (21.5 percent) and the ventricular-paced group (23.0 percent, P=0.48). In patients assigned to dual-chamber pacing, the risk of atrial fibrillation was lower (hazard ratio, 0.79; 95 percent confidence interval, 0.66 to 0.94; P=0.008), and heart-failure scores were better (P0.001). The differences in the rates of hospitalization for heart failure were not significant in unadjusted analyses but became marginally significant in adjusted analyses. Dual-chamber pacing resulted in a small but measurable increase in the quality of life, as compared with ventricular pacing. Conclusions—In sinus-node dysfunction, dual-chamber pacing does not improve stroke-free survival, as compared with ventricular pacing. However, dual-chamber pacing reduces the risk of atrial