The MIT-BIH Polysomnographic Database is a collection of recordings of multiple physiologic signals during sleep. Each record includes two annotation files. The annotation files have been made available in their present form to aid users of the database in locating interesting features of the recordings. The current annotation files, although they have been prepared with care and substantial effort, are likely to contain a small number of errors. Continuous monitoring of left ventricular function by an ambulatory radionuclide detector in patients with coronary artery disease.
Periodic apneas occur throughout the excerpt.