Rate- and rhythm-control therapies in patients with atrial fibrillation: a systematic review.

BACKGROUND: The comparative effectiveness of treatments for atrial fibrillation (AF) is uncertain. PURPOSE: To evaluate the comparative effectiveness of rate- and rhythm-control therapies. DATA SOURCES: English-language studies in PubMed, EMBASE, and the Cochrane Database of Systematic Reviews between January 2000 and November 2013. STUDY SELECTION: Two reviewers independently screened citations to identify comparative studies that assessed rate- or rhythm-control therapies in patients with AF. DATA EXTRACTION: Reviewers extracted data on study design, participant characteristics, interventions, outcomes, applicability, and quality. DATA SYNTHESIS: 200 articles (162 studies) involving 28,836 patients were included. When pharmacologic rate- and rhythm-control strategies were compared, strength of evidence (SOE) was moderate supporting comparable efficacy with regard to all-cause mortality (odds ratio [OR], 1.34 [95% CI, 0.89 to 2.02]), cardiac mortality (OR, 0.96 [CI, 0.77 to 1.20]), and stroke (OR, 0.99 [CI, 0.76 to 1.30]) in older patients with mild AF symptoms. Few studies compared rate-control therapies and included outcomes of interest, which limited conclusions. For the effect of rhythm-control therapies in reducing AF recurrence, SOE was high favoring pulmonary vein isolation versus antiarrhythmic medications (OR, 5.87 [CI, 3.18 to 10.85]) and the surgical maze procedure (including pulmonary vein isolation) done during other cardiac surgery versus other cardiac surgery alone (OR, 7.94 [CI, 3.63 to 17.36]). LIMITATION: Studies were heterogeneous in interventions, populations, settings, and outcomes. CONCLUSION: Pharmacologic rate- and rhythm-control strategies have comparable efficacy across outcomes in primarily older patients with mild AF symptoms. Pulmonary vein isolation is better than antiarrhythmic medications at reducing recurrences of AF in younger patients with paroxysmal AF and mild structural heart disease. Future research should address uncertainties related to subgroups of interest and the effect of different therapies on long-term clinical outcomes. PRIMARY FUNDING SOURCE: Agency for Healthcare Research and Quality.

Mast cell IL-4 expression is regulated by Ikaros and influences encephalitogenic Th1 responses in EAE.

When exposed to a pathogen, a naive CD4(+) T cell is forced to make a cell fate decision that leads to a polarized population of Th1 IFN-gamma- or Th2 IL-4- producing cells. Although IL-4 has traditionally been considered a factor that promotes Th2 cell differentiation, recent evidence has demonstrated that the site and timing of IL-4 expression in an immune response determines its ultimate effects on CD4(+) T cell fate. Using a mast cell (MC) reconstitution model, we demonstrate that MC-derived IL-4 promoted Th1 responses in vivo. Furthermore, MCs from genetically disparate mouse strains varied in their potential for IL-4 expression. Independent of the activation mode, MCs from Th1-prone C57BL/6 mice exhibited a more robust Il4 response than did the Th2-prone strain Balb/c. The hierarchy of IL-4 expression potential was directly associated with the degree of basal chromatin accessibility at cis-regulatory elements conserved noncoding sequence-1 and V(A) enhancer within the Th2 locus. GATA1/2 and Ikaros, factors with opposing roles in chromatin remodeling, acted at these sites. We propose that GATA and Ikaros proteins coordinately fine-tune accessibility at the Il4 locus during development to variably regulate IL-4 expression. These events likely contribute to the genetically determined heterogeneity in Th1 responses that underlie susceptibility to many diseases.

An Educational and Administrative Intervention to Promote Rational Laboratory Test Ordering on an Academic General Medicine Service.

BACKGROUND: Overuse of clinical laboratory testing in the inpatient setting is a common problem. The objective of this project was to develop an inexpensive and easily implemented intervention to promote rational laboratory use without compromising resident education or patient care. METHODS: The study comprised of a cluster-randomized, controlled trial to assess the impact of a multifaceted intervention of education, guideline development, elimination of recurring laboratory orders, unbundling of laboratory panels, and redesign of the daily progress note on laboratory test ordering. The population included all patients hospitalized "general medicine" was duplicated during 2 consecutive months on a general medicine teaching service within a 999-bed tertiary care hospital in Boston, Massachusetts. The primary outcome was the total number of commonly used laboratory tests per patient day during 2 months in 2008. Secondary outcomes included a subgroup analysis of each individual test per patient day, adverse events, and resident and nursing satisfaction. RESULTS: A total of 5392 patient days were captured. The intervention produced a 9% decrease in aggregate laboratory use (rate ratio, 0.91; P = .021; 95% confidence interval, 0.84-0.98). Six instances of delayed diagnosis of acute kidney injury and 11 near misses were reported in the intervention arm. CONCLUSIONS: A bundled educational and administrative intervention promoting rational ordering of laboratory tests on a single academic general medicine service led to a modest but significant decrease in laboratory use. To our knowledge, this was the first study to examine the daily progress note as a tool to limit excessive test ordering. Unadjudicated near misses and possible harm were reported with this intervention. This finding warrants further study.

Value-based insurance design: quality improvement but no cost savings.

Value-based insurance design (VBID) is an approach that attempts to improve the quality of care by selectively encouraging or discouraging the use of specific health care services, based on their potential benefit to patients' health, relative to their cost. Lowering beneficiary cost sharing or out-of-pocket spending to increase medication adherence is one common element of value-based insurance design. We conducted a systematic review of the peer-reviewed literature to evaluate the evidence of the effects of VBID policies on medication adherence and medical expenditures. We identified thirteen studies assessing the effects of VBID programs and found that the programs were consistently associated with improved adherence (average change of 3.0 percent over one year), as well as with lower out-of-pocket spending for drugs. In the studies we reviewed, providing more generous coverage did not lead to significant changes in overall medical spending for patients and insurers. Further research is needed to understand how best to structure VBID programs to both improve quality and reduce spending.

Improving the discharge process by embedding a discharge facilitator in a resident team.

BACKGROUND: Hospital discharges are vulnerable periods for patient safety, especially in teaching hospitals where discharges are done by residents with competing demands. We sought to assess whether embedding a nurse practitioner on a medical team to help physicians with the discharge process would improve communication, patient follow-up, and hospital reutilization. METHODS: A 5-month randomized controlled trial was conducted on the medical service at an academic tertiary-care hospital. A nurse practitioner was randomly assigned to 1 resident team to complete discharge paperwork, arrange follow-up appointments and prescriptions, communicate discharge plans with nursing and primary care physicians, and answer questions from discharged patients. RESULTS: Intervention patients had more discharge summaries completed within 24 hours (67% vs. 47%, P < 0.001). Similarly, they had more follow-up appointments scheduled by the time of discharge (62% vs. 36%, P < 0.0001) and attended those appointments more often within 2 weeks (36% vs. 23%, P < 0.0002). Intervention patients knew whom to call with questions (95% vs. 85%, P = 0.003) and were more satisfied with the discharge process (97% vs. 76%, P < 0.0001). Attending rounds on the intervention team finished on time (45% vs. 31%, P = 0.058), and residents signed out on average 46 minutes earlier each day. There was no significant difference between the groups in 30-day emergency department visits or readmissions. CONCLUSIONS: Helping resident physicians with the discharge process improves many aspects of discharge communication and patient follow-up, and saves residents' time, but had no effect on hospital reutilization for a general medicine population.