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Epidemiology and natural history of atrial fibrillation: clinical implications
S S Chugh1, J L Blackshear, W K Shen
1Division of Cardiovascular Diseases and Internal Medicine, Mayo Clinic and Mayo Foundation, Rochester, Minnesota, USA.
Insights
Atrial fibrillation (AF) is a growing epidemic impacting morbidity and mortality. Understanding AF epidemiology and natural history is crucial for developing new therapies and managing this complex arrhythmia.
Area of Science:
- Cardiology
- Genetics
- Epidemiology
Background:
- Atrial fibrillation (AF) presents a significant global health challenge, impacting morbidity and mortality.
- AF is associated with aging, hypertension, thromboembolism, and left ventricular dysfunction.
- Current clinical management of AF is heavily influenced by its epidemiology and natural history.
Purpose of the Study:
- To review the current understanding of atrial fibrillation (AF) epidemiology and natural history.
- To explore the potential impact of new research, including functional genomics, on AF management.
- To highlight the importance of understanding AF's molecular basis for developing novel therapeutic strategies.
Main Methods:
- Review of existing epidemiological data on atrial fibrillation.
- Analysis of current research trends in understanding the natural history of AF.
- Exploration of functional genomics and molecular genetics in defining the basis of AF.
Main Results:
- The epidemiology and natural history of AF are critical determinants of its clinical management.
- Electrical and structural remodeling processes perpetuating AF show potential reversibility.
- Functional genomics is beginning to define the molecular basis of AF, offering new treatment avenues.
Conclusions:
- Understanding AF epidemiology and natural history is essential for resource allocation and therapy utilization.
- Advances in molecular genetics may lead to new treatments targeting ion channels and cellular mechanisms.
- The evolving knowledge base and potential new therapies offer hope for mitigating the impact of AF.
Abstract:
With a substantial impact on morbidity and mortality, the growing "epidemic" of atrial fibrillation (AF) intersects with a number of conditions, including aging, thromboembolism, hemorrhage, hypertension and left ventricular dysfunction. Currently, the epidemiology and natural history of AF govern all aspects of its clinical management. The ongoing global investigative efforts toward understanding AF are also driven by epidemiologic findings. New developments, by affecting the natural history of the disease, could eventually alter the nature of decision making in patients with AF. The crucial issue of rate versus rhythm control awaits completion of the AF Follow-up Investigation of Rhythm Management trial. The processes of electrical and structural remodeling that perpetuate AF appear to be reversible. In the era of functional genomics, the molecular basis of this ubiquitous arrhythmia is in the process of being defined. Unraveling the molecular genetics of AF might provide new insights into the structural and electrical phenotypes resulting from genetic mutations and, as such, new approaches to treatment of this arrhythmia at the ion channel and cellular levels. Thus, current adverse trends are superimposed on a background of a rapidly developing knowledge base and potentially exciting new therapeutic options. Consequently, an understanding of the epidemiology and natural history of AF is crucial to the future allocation of resources and the utilization of an expanding range of therapies aimed at reducing the impact of this disease on a changing patient population.