by Pam McKeeObstructive sleep apnea (OSA) is a major risk factor for sudden cardiac death (SCD) according to new medical research from the Mayo Clinic. The research points to the importance of prescribed therapy to avoid the risks associated with sleep apnea.In a study of about 11,000 adults, researchers found that sleep apnea was the second biggest risk factors for sudden death among heart disease patients. (The second trait was an age of 60 years or older.)Untreated sleep apnea causes nighttim