Congestive heart failure epidemiology and demographics
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Congestive heart failure epidemiology and demographics On the Web
Heart failure affects close to 5 million people in the United States of America and each year close to 500,000 new cases are diagnosed. Congestive heart failure is responsible for a significant portion of the healthcare budget, and more than 50% of patients seek re-admission within 6 months after treatment and the average duration of hospital stay is 6 days. In 2001, nearly 53,000 patients died of heart failure as a primary cause.
Epidemiology and Demographics
It is estimated that about 5.7 million adults in the United States have heart failure (about 2,650,000 males, and 2,650,000 females).
Prevalence of heart failure by sex and age (Source: National Center for Health Statistics and National Heart, Lung, and Blood Institute).
- Approximately, there are 915 000 new HF cases annually.
- Heart failure (HF) incidence approaches 10 per 1,000 population after age 65.
- 75% of heart failure cases have antecedent hypertension. About 22% of male and 46% of female myocardial infarction (MI) victims will be disabled with heart failure within 6 years of the index event.
- At age 40, the lifetime risk of developing heart failure for both men and women is 1 in 5.
- At age 40, the lifetime risk of heart failure occurring without antecedent myocardial infarction is 1 in 9 for men and 1 in 6 for women.
- The lifetime risk doubles for people with blood pressure >160/90 mm Hg compared to those with blood pressure <140/90 mm Hg.
- A study conducted in Olmsted County, Minnesota, showed that the incidence of heart failure (ICD9/428) has not declined during two decades, but survival after onset has increased overall, with less improvement among women and elderly persons. 
Heart failure is the leading cause of hospitalization in people older than 65. In developed countries, the mean age of patients with heart failure is 75 years old. In developing countries, two to three percent of the population suffers from heart failure, but in those 70 to 80 years old, it occurs in 20—30 percent. The incidence of heart failure approaches 10 per 1000 population after age 65 years, and approximately 80% of patients hospitalized are more than 65 years old.
Men have a higher incidence of heart failure, but the overall prevalence rate is similar in both sexes, since women survive longer after the onset of heart failure. Women tend to be older when diagnosed with heart failure (after menopause), they are more likely than men to have diastolic dysfunction, and seem to experience a lower overall quality of life than men after diagnosis.
New information suggests that elements of heart failure in African Americans and Caucasians may be different and therapy for heart failure has different efficacies depending on racial, ethnic, and genetic backgrounds. Blacks have the highest risk for HF. In the Atherosclerosis Risk In Communities (ARIC) study, black men were found to have the highest risk, while white women were found to have the lowest risk.
Country Specific Causes
In tropical countries, the most common cause of HF is valvular heart disease or some type of cardiomyopathy. Moreover as underdeveloped countries become more affluent, there has also been an increase in diabetes, hypertension and obesity which has resulted in heart failure.
In USA, HF is much higher in African Americans, Hispanics, Native Americans and recent immigrants from the eastern bloc countries like Russia. This high prevalence in these ethnic populations has been linked to high incidence of diabetes and hypertension. In many new immigrants to the USA the high prevalence of heart failure has largely been attributed to lack of preventive health care or substandard treatment.
In the United States, HF costs exceed $40 billion, taking into consideration the cost of medications, healthcare services and lack of productivity. It's noteworthy that HF is respsonsible for 1 in 9 deaths in the United States.
Hospital discharges for heart failure by sex which include people discharged alive, dead, and status unknown. Source: National Hospital Discharge Survey/National Center for Health Statistics and National Heart, Lung, and Blood Institute.
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