A person with sleep apnea may experience increased problems with their circulatory systems. The lack of oxygen in the body can attribute to this. Many people that have high blood pressure or people that are obese are more prone to having sleep apnea.
These conditions already put strain on a person's heart. Adding sleep apnea in can cause issues like abnormal heart rhythms. If a person is not treating their conditions they may have a stroke or even go into heart failure.