Participants will be healthy volunteers or subjects with the diagnosis of hypertrophic cardiomyopathy (HCM). All patients will a undergo a one time; medical history, physical examination, questionnaires, sleep observation in hospital, blood and urine samples, ultrasound scan of the heart, paced breathing test, ultrasound of brachial artery in the arm, MRI of the heart & 48 hour ECG Holter monitoring. Comparison between the normal volunteers and subjects with HCM will be made.
The investigators are trying to find out how common sleep apnea is in hypertrophic cardiomyopathy. The purpose of this study is to see if sleep apnea is common in hypertrophic cardiomyopathy and if its presence is associated with changes in the functioning of the body. The investigators want to determine if sleep apnea is associated with electrical disorders of the heart in patients with hypertrophic cardiomyopathy.