CardioNet Inc, Conshohocken, Pa, now offers SomNet, a clinical indicator available in the company’s existing Mobile Cardiac Outpatient Telemetry (MCOT) system. SomNet measures cyclic variation of heart rate (CVHR), a rhythm that is caused by repeated arousals from sleep due to disorders such as sleep apnea.

“There is a high prevalence of sleep disorders like sleep apnea in the cardiovascular and arrhythmia population,” said Randy Thurman, CEO of CardioNet in an announcement from the company. “The data collected by SomNet is extremely valuable information that can be captured from our existing MCOT ECG signal. If clinically appropriate, physicians may choose to refer patients with CVHR patterns to sleep centers for further diagnostic testing, to determine if they have sleep apnea or another serious sleep disorder.”