Sleep apnea, cardiac arrhythmias, and sudden death.
Year: 2011
Type: article
Abstract: Normal physiologic sleep consists of rapid-eye-movement (REM) sleep and non-rapid-eye-movement (NREM) sleep, which alternate within sleep cycles of approximately 90 minutes in length. Non-REM sleep constitutes about three quarters of each 90-minute cycle and is characterized by increased parasympathetic tone and decreased sympathetic activity, which together decrease the heart rate, blood pressure, and cardiac output. On the other hand, REM sleep can be described as erratic, and it is characterized by irregular breathing patterns and varying heart rate.1,2 It constitutes the remaining quarter of each sleep cycle.
Source: Europe PMC (PubMed Central)
Authors: Ondrej Ludka, Tomas Konecny, Virend Somers
Institutions: Masaryk University, University Hospital Brno, Mayo Clinic
Language: English
Subfield: Physiology (medical)
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W87334503