Citation: Carrier M, Le Gal G, Wells PS, Fergusson D, Ramsay T, Rodger MA. Systematic review: the Trousseau syndrome revisited: should we screen extensively for cancer in patients with venous thromboembolism? Ann Intern Med. 2008;149: 323-333.
Does the use of preadmission statins decrease the risk of death, bacteremia, and pulmonary complications in patients admitted with pneumonia?
Background: Both experimental and clinical studies have suggested statins improve outcomes in severe infections, such as sepsis. This is thought to be due to the antithrombotic, anti-inflammatory, and immunomodulatory effects of statins. However, previous studies on the effect of statins on pneumonia have conflicting outcomes.
Study design: Population-based cohort study of 29,900 patients.
Setting: Danish Health Registry.
Synopsis: Researchers studied patients ages 15 years and older hospitalized with pneumonia for the first time between January 1997 and December 2004. While statin users had more co-morbidities than nonusers, the 30-day mortality was 10.3% in users, compared with 15.7% in nonusers, corresponding to an adjusted 30-day mortality rate ratio of 0.69 (95% CI of 0.58-0.82). The 90-day mortality ratio was 16.8% in users, compared with 22.4% in nonusers, corresponding to an adjusted 90-day mortality ratio of 0.75 (95% CI of 0.65-0.86). Former use of statins was not associated with a decreased risk of death. The adjusted risk for bacteremia and pulmonary complications was not significantly different between nonusers and users.
Because this was an observational study, a causal relationship cannot be determined. Hospitalists should be alerted to the possibility statins might, in the future, prove to be a standard treatment modality in pneumonia. A randomized, double-blind trial might help further determine the effect of the acute use of statins on pneumonia outcomes.
Bottom line: Preadmission statin use is associated with a decrease in 30- and 90-day mortality in pneumonia.
Citation: Thomsen RW, Riis A, Kornum JB, Christensen S, Johnsen SP, Sorensen HT. Preadmission use of statins and outcomes after hospitalization with pneumonia. Arch Intern Med. 2008;168(19):2081-2087.
Do outcomes differ when patients with acute myocardial infarction (MI) undergo PCI with drug-eluting stents (DES) compared with bare-metal stents?
Background: Randomized trials comparing drug-eluting stents with bare-metal stents in acute MI have been limited in size and duration. Concern exists regarding higher mortality among patients with ST-elevation MI treated with DES.
Study design: Observational, cohort study.
Setting: Patients were identified from a state-mandated database, in which all PCI performed in Massachusetts are reported.
Synopsis: Between April 2003 and September 2004, 7,217 eligible patients underwent stenting for acute MI. They were assigned to either the DES group or the bare-metal stent (BMS) group using propensity score matching. Patients in the DES group had lower mortality at two years, compared to a matched cohort of patients in the BMS group with MI (10.7% vs. 12.8%; absolute risk difference, -2.1%, CI, -3.8% to -0.4%). A statistically significant difference was noted among patients with or without ST-elevation MI.
The rates of target vessel revascularization at two years with MI were significantly lower among patients receiving DES than among those receiving BMS (9.6% vs. 14.5%; risk difference, -4.9%; CI, -6.1% to -3.1%).
The study is limited by its observational nature and residual confounding bias after matching. Importantly, this study was performed to determine if DESs were harmful, and the finding of reduced mortality was unanticipated.
Bottom line: Although patients with acute MI treated with drug-eluting stents had lower mortality and repeat revascularization rates compared with bare-metal stents, this outcome merits confirmation in randomized trials.
Citation: Mauri L, Silbaugh TS, Garg P, et al. Drug-eluting or bare-metal stents for acute myocardial infarction. N Engl J Med. 2008;359 (13):1330-1342.