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Chronic heart failure in Japan: implications of the CHART studies
Nobuyuki Shiba1, Hiroaki Shimokawa
1Department of Cardiovascular Medicine, Department of Evidence-Based Cardiovascular Medicine, Tohoku University Graduate School of Medicine Sendai City, Japan. nshiba@cardio.med.tohoku.ac.jp
Insights
Chronic heart failure (CHF) prognosis remains poor, even with advanced treatments. Japanese CHF patients face similar poor outcomes as Western populations, highlighting the need for more research and prevention strategies.
Area of Science:
- Cardiology
- Public Health
- Epidemiology
Background:
- Chronic heart failure (CHF) poses a significant public health challenge, particularly in aging industrialized nations.
- While historically lower in Japan, CHF prevalence and mortality are increasing due to societal aging and lifestyle changes.
- Despite medical advances, the prognosis for CHF patients remains poor.
Purpose of the Study:
- To review the current status of chronic heart failure (CHF) research in Japan.
- To discuss the findings of the Chronic Heart Failure Analysis and Registry in the Tohoku District (CHART)-1 study.
- To highlight the need for further evidence and the initiation of the CHART-2 study for CHF prevention in Japan.
Main Methods:
- Analysis of data from the CHART-1 study, one of Japan's largest CHF cohorts.
- Review of existing literature on CHF prevalence, characteristics, and prognosis in Japan.
- Description of the objectives and design of the prospective CHART-2 study.
Main Results:
- The CHART-1 study revealed that Japanese CHF patients have a prognosis comparable to Western populations.
- The study identified key characteristics of CHF in the Japanese population.
- Evidence suggests a growing need for prevention strategies alongside treatment.
Conclusions:
- Japanese patients with chronic heart failure (CHF) experience poor prognoses similar to those in Western countries.
- There is a critical need for large-scale cohort studies and randomized trials in Japan to inform prevention and treatment strategies.
- The ongoing CHART-2 study aims to identify risk factors for CHF in Japan, shifting focus towards prevention.
Abstract:
The prognosis of patients with chronic heart failure (CHF) still remains poor, despite the recent advances in medical and surgical treatment. Furthermore, CHF is a major public health problem in most industrialized countries where the elderly population is rapidly increasing. Although the prevalence and mortality of CHF used to be relatively low in Japan, the disorder has been markedly increasing due to the rapid aging of the society and the Westernization of lifestyle that facilitates the development of coronary artery disease. The Chronic Heart Failure Analysis and Registry in the Tohoku District (CHART)-1 study was one of the largest cohorts in Japan. The study has clarified the characteristics and prognosis of Japanese patients with CHF, demonstrating that their prognosis was similarly poor compared with those in Western countries. However, we still need evidence for the prevention and treatment of CHF based on the large cohort studies or randomized treatment trials in the Japanese population. Since the strategy for CHF management is now changing from treatment to prevention, a larger-size prospective cohort, called the CHART-2 study, has been initiated to evaluate the risk factors of CHF in Japan. This review summarizes the current status of CHF studies in Japan and discusses their future perspectives.
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