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Palpitations are perceived abnormalities of the heartbeat characterized by awareness of cardiac muscle contractions in the chest, which is further characterized by the hard, fast and/or irregular beatings of the heart. [1] Symptoms include a rapid pulsation, an abnormally rapid or irregular beating of the heart. [1]
Re-entrant arrhythmias occur when an electrical impulse recurrently travels in a tight circle within the heart, rather than moving from one end of the heart to the other and then stopping. [28] [29] Every cardiac cell can transmit impulses of excitation in every direction but will do so only once within a short time.
The idea of the witching hour may stem from the human sleep cycle and circadian rhythm – the body is going through REM sleep at that time, where the heart rate is slower, body temperature reduced, breathing pattern and blood pressure irregular. [5] Sudden awakening from REM sleep could cause agitation, fear and disorientation in an individual ...
Sleeping and waking up at different times is associated with an increased risk of heart attack and stroke, even for people who get the recommended amount of sleep, according to new research.
Conversely, more sleep regularity was protective against heart attack and stroke. A new study found an increased risk of cardiovascular events in people with irregular sleep patterns, even when ...
Waking up during this time can mean that you're backed up with "waste" in the form of negative emotions, and that you need to process them in order to flush them out.
A hypnic jerk, hypnagogic jerk, sleep start, sleep twitch, myoclonic jerk, or night start is a brief and sudden involuntary contraction of the muscles of the body which occurs when a person is beginning to fall asleep, often causing the person to jump and awaken suddenly for a moment.
Dysrhythmia may refer to: . Circadian dysrhythmias, disturbances of circadian (daily) rhythms including jet lag and disturbed sleep timing; Cardiac dysrhythmia, a medical condition causing irregular heart rate, also called arrhythmia