Atrial Fibrillation Epidemic and Hospitalizations
2014; Lippincott Williams & Wilkins; Volume: 129; Issue: 23 Linguagem: Inglês
10.1161/circulationaha.114.010073
ISSN1524-4539
AutoresChristopher X. Wong, Dennis H. Lau, Prashanthan Sanders,
Tópico(s)Blood Pressure and Hypertension Studies
ResumoHomeCirculationVol. 129, No. 23Atrial Fibrillation Epidemic and Hospitalizations Free AccessEditorialPDF/EPUBAboutView PDFView EPUBSections ToolsAdd to favoritesDownload citationsTrack citationsPermissions ShareShare onFacebookTwitterLinked InMendeleyReddit Jump toFree AccessEditorialPDF/EPUBAtrial Fibrillation Epidemic and HospitalizationsHow to Turn the Rising Tide? Christopher X. Wong, MBBS, Dennis H. Lau, MBBS, PhD and Prashanthan Sanders, MBBS, PhD Christopher X. WongChristopher X. Wong From the Centre for Heart Rhythm Disorders, South Australian Health and Medical Research Institute, University of Adelaide and the Royal Adelaide Hospital, Adelaide, Australia. , Dennis H. LauDennis H. Lau From the Centre for Heart Rhythm Disorders, South Australian Health and Medical Research Institute, University of Adelaide and the Royal Adelaide Hospital, Adelaide, Australia. and Prashanthan SandersPrashanthan Sanders From the Centre for Heart Rhythm Disorders, South Australian Health and Medical Research Institute, University of Adelaide and the Royal Adelaide Hospital, Adelaide, Australia. Originally published19 May 2014https://doi.org/10.1161/CIRCULATIONAHA.114.010073Circulation. 2014;129:2361–2363Other version(s) of this articleYou are viewing the most recent version of this article. Previous versions: June 10, 2014: Previous Version 1 Numerous countries worldwide are facing the major challenge of rising healthcare expenditure, a concern driven particularly by advancing medical treatments and aging population structures. In the United States over the past 50 years, increasing national healthcare expenditure has consistently outpaced growth in real gross domestic product per capita, exceeding every other country to peak at 18% of the gross domestic product in 2012.1 Given that hospitals are the largest contributor to each dollar spent on health care, the characterization of hospitalization trends is a logical first step in identifying possible opportunities to intervene and slow the rising demands on healthcare systems.Article see p 2371It is in this context that Patel and colleagues describe contemporary trends of hospitalizations for atrial fibrillation (AF) in the current issue of Circulation.2 An increasing number of recent studies have highlighted the emergence of AF as a growing epidemic.3,4 Although the morbidity and mortality associated with this most common arrhythmia has been increasingly well characterized, few studies have comprehensively described the effect of rising AF rates on hospital use on a national scale. Using data from the Nationwide Inpatient Sample, Patel and colleagues therefore characterized the trend of hospitalization rates for AF in the United States from 2000 to 2010. They found an overall 23% growth in AF hospitalizations, importantly noting that the increase was particularly prominent in elderly patients. More than two-thirds of the patients were >65 years of age, and those >80 years of age had an exponential increase in hospitalization rates (9361 per million in 2001 to 11 045 per million in 2010). Furthermore, despite a static mean length of stay and declining in-hospital mortality associated with AF hospitalizations, inflation-adjusted costs from these hospitalizations rose from $6410 in 2001 to $8439 in 2010. As a result, the annual national cost of AF hospitalizations rose from 2.15 billion dollars in 2001 to 3.46 billion dollars in 2010. Similar to US healthcare expenditure patterns, in general, most of the annual healthcare costs associated with AF have been linked to inpatient care.5 The increasing hospitalization trends seen in this contemporary analysis thus confirm that the economic and public health burden of hospitalizations, as a component of total AF healthcare costs, continues to grow. It also is in agreement with other data suggesting that the rate of increase in AF may be overtaking other common conditions, such as myocardial infarction and heart failure, as the dominant reason for cardiovascular hospitalizations.6 Furthermore, the present analysis did not include emergency department presentations and AF complicating hospitalizations where a different primary diagnosis was listed; these figures may therefore be an underestimate of both the total scale and cost of AF-related hospital use.An article in this journal recently likened the increasing global burden of AF to a rising tide.7 The pertinent question, therefore, is how to turn this tide, if it is indeed a tide? Although tides recede, data to date suggest that the burden of AF shows no sign of abating, and a more appropriate metaphor may therefore be rising sea levels. It is in this regard that the subtleties from the present and previous reports provide important insights and implications. These provide multiple possible reasons for the rising sea levels. The increasing incidence of AF with age is an obvious contributor given the aging population; however, the confirmation that the age-specific rate of AF hospitalizations is also increasing is noteworthy.8 Although the reasons for this age-specific increase are not clear, comorbid conditions, symptom severity, and atrial remodeling have, among other factors, been identified as predictors of AF hospitalizations. It is possible that worsening risk factor profiles independent of the aging population are driving these predictors.9 Some have suggested that the emergence of electrophysiology procedures may be a significant contributor, but this has not been confirmed in other reports.8,10 Regardless of the reasons, however, the increase in age-specific hospitalization rates has significant implications for healthcare planning given the multiplicative effects of continually aging population structures.11Patel and colleagues also describe how the prevalence of numerous comorbidities increased over the study period; these included hypertension, diabetes mellitus, chronic obstructive pulmonary disease, obesity, and renal failure. Although other major AF risk factors such as ischemic heart disease and obstructive sleep apnea were not reported, it was interesting to note that the rates of heart failure and valvular disease did not increase over the study period. Although heart failure was associated with greater inpatient mortality, these data are nevertheless consistent with the trend that other AF risk factors are increasingly more prevalent at a population level than heart failure and valvular disease and therefore are relevant to the current AF epidemic. It is most likely that the increasing prevalence of these risk factors is fueling the underlying atrial substrates that predispose to the development of AF. Public health interventions to reduce the burden of AF on both patients and healthcare systems should thus be centered on the prevention and management of risk factors, because this approach is likely to have the greatest population impact. Given that age is not modifiable, closer and more aggressive attention is warranted toward the treatable, predisposing risk factors mentioned above that are increasingly prevalent in our aging society. Supporting the likely potential for this strategy to be effective is the fact that Patel and colleagues found that hospitals in the Southern region where the stroke belt and excess comorbidities are found constituted the greatest percentage of AF hospitalizations. The importance of aggressive risk factor modification in the management of AF is highlighted by a recent study that demonstrates the profound impact on AF symptom burden and thus possibly healthcare use.12 Indeed, a focus on risk factor management may assist in the primary prevention of AF. Likewise, it is important to identify unrecognized and undertreated risk factors that may contribute to poorer rhythm control in AF patients and result in greater healthcare use.13Patel and colleagues also describe how increasing dispositions to another facility contribute to overall costs; this is particularly significant for those patients having a consequent stroke in whom one-quarter required transfer to a long-term institution. It has been consistently recognized that a significant percentage of patients with AF do not receive guideline-recommended antithrombotic therapy; this reflects not only underanticoagulation in those at high risk of ischemic stroke, but also, overanticoagulation in those at low risk.14 Others have similarly highlighted that suboptimal management of antithrombotic medication in those with AF may predict hospitalizations.9 Better antithrombotic management of patients with established AF is therefore is an area worth targeting to reduce healthcare use from ischemic strokes or bleeding complications. The recent emergence of novel anticoagulants also promises to cost-effectively reduce healthcare use, although this requires further confirmatory study.15Finally, it may be possible to reduce hospitalizations by implementing processes that shift management from an inpatient to outpatient setting. Optimizing rate and rhythm management strategies for those with established AF, including continual advancements in and application of ablation techniques, may assist in this regard.16 Systems approaches to streamline the complex management of AF are also highly effective. One US hospital has previously described how the implementation of AF practice guidelines at their institution significantly reduced hospitalization rates without an increase in adverse events, preventing avoidable inpatient management and leading to significant economic savings.17 Specialized clinics staffed with experienced teams, comprehensive management programs, and electronic support systems are also promising approaches to reduce hospitalizations and possibly cardiovascular mortality.18In conclusion, Patel and colleagues have highlighted that the AF epidemic is having a continual and significant impact on hospital use in the United States. Their report contributes to the growing body of evidence that AF represents a major public health concern worldwide and cements the need for us to do better—in preventing AF, in treating individuals with established AF, and in implementing better system approaches to AF management—lest our hospitals and wider healthcare systems be engulfed by the rising sea levels of the AF epidemic.Sources of FundingThis work was funded in part by a South Australian Cardiovascular Research Development Grant from the National Heart Foundation of Australia. Dr Wong is supported by a Rhodes Scholarship and a Postgraduate Scholarship from the National Health and Medical Research Council of Australia (NHMRC). Dr Lau is supported by a Postdoctoral Fellowship from the NHMRC. Dr Sanders is supported by a Practitioner Fellowship from the NHMRC and by the National Heart Foundation of Australia.DisclosuresDr Sanders reports having served on the advisory board of Biosense-Webster, Medtronic, St Jude Medical, Sanofi-Aventis and Merck, Sharpe and Dohme. He reports having received lecture and/or consulting fees from Biosense-Webster, Medtronic, St Jude Medical, Boston Scientific, Merck, Sharpe and Dohme, Biotronik and Sanofi-Aventis, and having received research funding from Medtronic, St Jude Medical, Boston Scientific, Biotronik and Sorin. The other authors report no conflicts.FootnotesThe opinions expressed in this article are not necessarily those of the editors or of the American Heart Association.Correspondence to Prashanthan Sanders, MBBS, PhD, Centre for Heart Rhythm Disorders, Department of Cardiology, Royal Adelaide Hospital, Adelaide, SA 5000, Australia. E-mail [email protected]References1. 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June 10, 2014Vol 129, Issue 23 Advertisement Article InformationMetrics © 2014 American Heart Association, Inc.https://doi.org/10.1161/CIRCULATIONAHA.114.010073PMID: 24842944 Originally publishedMay 19, 2014 Keywordshospital costsatrial fibrillationhospitalizationheart failureEditorialsPDF download Advertisement SubjectsArrhythmias
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