How common is Hypertrophic Cardiomyopathy?
Hypertrophic Cardiomyopathy is a not an uncommon heart disease. Publications from the 2000's indicate that HCM is the most common of all genetic heart conditions affecting over 1 in 500 people in the general population. Based on these data we may estimate that between 700K and 725K people in the United States have HCM. Subsequent studies have also proven that HCM has a prevalence of 1 in 500 in a wide variety of populations including, Native Americans, Chinese, Rural Midwestern US, and others. There is no gender, age, or ethnic factor specific to HCM, HCM is an equal opportunity disease.
The number 1 in 500 comes from the day of echocardiogram data, meaning researchers would look at thousands of echocardiograms to see how many hearts had the clinical signs of HCM. In 2015, we have 2 new technologies that have shown HCM may be even more common than originally thought, the cardiac MRI and genetic testing. When looking at all data collection the number of those with clinical HCM either on echocardiogram or MRI and those with a genetic marker for HCM the number of those with HCM may increase to up to 1 in 200 to 300 - this data is still in process. Therefore we can estimate HCM is present in nearly 1 million+ in the USA and 36 million or more worldwide.
Figure 5 indicates that even using the older data at 1 in 500, HCM is more common than many diseases that have greater name recognition.
This image explains the previous studies done world wide to arrive at the prevelance of HCM being 1 in 500.
However, new data publised in 2015 updates this data to bring HCM conservitively up to 1 in 300 or more.
Am Heart J. 2015 Aug;170(2):223-30. doi: 10.1016/j.ahj.2015.05.01