The frequency of cardiac arrhythmias in wake and sleep was studied in 18 patients admitted to a coronary care unit. No significant differences were found in the distribution of ventricular premature contractions (VPCs) or atrial premature contractions (APCs) in either wake or sleep. A tendency for ventricular premature contractions to occur more commonly during wake-sleep transitions than during sleep transition periods (NREM-REM) was noted but this did not attain significance.
Smith R, Johnson L, Rothfeld D, Zir L, Tharp B. Sleep and Cardiac Arrhythmias. Arch Intern Med. 1972;130(5):751–753. doi:10.1001/archinte.1972.03650050071013
* * SCHEDULED MAINTENANCE * *
The JAMA Network Sites will be conducting routine maintenance from 10/20/2017 through 10/21/2017. During this window access to content and authentication may be intermittently available. The JAMA Store will be completely unavailable during the maintenance window.