Prevalence and Incidence of Dilated cardiomyopathy
Dilated cardiomyopathy Prevalence: Book Excerpts
Prevalence/Incidence of Dilated cardiomyopathy: Online Medical Books
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Review excerpts from medical books online, free, without registration,
for more information about the prevalence and/or incidence of Dilated cardiomyopathy.
Dilated cardiomyopathy:
Causes and incidence
(Professional Guide to Diseases (Eighth Edition))
The cause of most cardiomyopathies is unknown. Occasionally, dilated cardiomyopathy results from myocardial destruction by toxic, infectious, or metabolic agents, such as certain viruses, endocrine and electrolyte disorders, and nutritional deficiencies. Other causes include muscle disorders (myasthenia gravis, progressive muscular dystrophy, and myotonic dystrophy), infiltrative disorders (hemochromatosis and amyloidosis), and sarcoidosis.
Cardiomyopathy may also be a complication of alcoholism. In such cases, it may improve with abstinence from alcohol but recurs when the patient resumes drinking. How viruses induce cardiomyopathy is unclear, but researchers suspect a link between viral myocarditis and subsequent dilated cardiomyopathy, especially after infection with poliovirus, coxsackievirus B, influenza virus, or human immunodeficiency virus.
Metabolic cardiomyopathies are related to endocrine and electrolyte disorders and nutritional deficiencies. Thus, dilated cardiomyopathy may develop in patients with hyperthyroidism, pheochromocytoma, beriberi (thiamine deficiency), or kwashiorkor (protein deficiency). Cardiomyopathy may also result from rheumatic fever, especially among children with myocarditis.
Antepartal or postpartal cardiomyopathy may develop during the last trimester or within months after delivery. Its cause is unknown, but it occurs most frequently in multiparous women older than age 30, particularly those with malnutrition or preeclampsia. In these patients, cardiomegaly and heart failure may reverse with treatment, allowing a subsequent normal pregnancy. If cardiomegaly persists despite treatment, the prognosis is poor.
Dilated cardiomyopathy occurs in 2 of every 100 people and affects all ages and sexes. It’s most common in adult men.
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Source: Professional Guide to Diseases (Eighth Edition), 2005
Hypertrophic cardiomyopathy:
Causes and incidence
(Professional Guide to Diseases (Eighth Edition))
Despite being designated as idiopathic, in almost all cases, hypertrophic cardiomyopathy may be inherited as a non–sex-linked autosomal dominant trait. Most patients have obstructive disease, resulting from effects of ventricular septal hypertrophy and the movement of the anterior mitral valve leaflet into the outflow tract during systole. Eventually, left ventricular dysfunction, from rigidity and decreased compliance, causes pump failure.
This disorder affects 2 to 5 of every 1,000 people.
» READ BOOK EXCERPT ONLINE »
Source: Professional Guide to Diseases (Eighth Edition), 2005
Restrictive cardiomyopathy:
Causes and incidence
(Professional Guide to Diseases (Eighth Edition))
An extremely rare disorder, primary restrictive cardiomyopathy is of unknown etiology. However, restrictive cardiomyopathy syndrome, a manifestation of amyloidosis, results from infiltration of amyloid into the intracellular spaces in the myocardium, endocardium, and subendocardium.
In both forms of restrictive cardiomyopathy, the myocardium becomes rigid, with poor distention during diastole, inhibiting complete ventricular filling, and fails to contract completely during systole, resulting in low cardiac output.
Restrictive cardiomyopathy is rare. It’s most common in children and young adults. Natives of Africa, South America, and India are at increased risk.
» READ BOOK EXCERPT ONLINE »
Source: Professional Guide to Diseases (Eighth Edition), 2005
Cardiomyopathy:
Cardiomyopathy - epidemiology
(The 5-Minute Pediatric Consult)
Cardiomyopathy - incidence
- Overall incidence of cardiomyopathy is 1–2 cases per 100,000 people. There is a peak incidence during the 1st year of life and a 2nd peak in adolescence.
- DCM: Studies have reported the incidence to range from 0.3–2.6 cases per 100,000 people.
- HCM: Reported incidence is 0.3–0.5 cases per 100,000 people.
Cardiomyopathy - prevalence
- DCM: 36 cases per 100,000 people
- HCM: Estimated to be 10–20 cases per 100,000 people
- RCM: Least common form of cardiomyopathy
» READ BOOK EXCERPT ONLINE »
Source: The 5-Minute Pediatric Consult, 2008
About prevalence and incidence statistics:
The term 'prevalence' of Dilated cardiomyopathy usually refers to the estimated population
of people who are managing Dilated cardiomyopathy at any given time.
The term 'incidence' of Dilated cardiomyopathy refers to the annual diagnosis rate,
or the number of new cases of Dilated cardiomyopathy diagnosed each year.
Hence, these two statistics types can differ:
a short-lived disease like flu can have high annual incidence but low prevalence,
but a life-long disease like diabetes has a low annual incidence but high prevalence.
For more information see about prevalence and incidence statistics.
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