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Bradycardia, also called bradyarrhythmia, is a resting heart rate under 60 beats per minute (BPM). [1] While bradycardia can result from various pathologic processes, it is commonly a physiologic response to cardiovascular conditioning or due to asymptomatic type 1 atrioventricular block.
[medical citation needed] Sinus bradycardia can also be an adaptive advantage; for example, diving seals may have a heart rate as low as 12 beats per minute, helping them to conserve oxygen during long dives. [4] Sinus bradycardia is a common condition found in both healthy individuals and those who are considered well-conditioned athletes. [5]
When this happens, the heart's atrioventricular node or bundle of His can take over as the pacemaker, starting the electrical signal that causes the heart to beat. [ 1 ] [ 5 ] Depending on where the rhythm originates in the AV node, the atria can contract before ventricular contraction due to retrograde conduction , during ventricular ...
A medical monitoring device displaying a normal human heart rate. Heart rate is the frequency of the heartbeat measured by the number of contractions of the heart per minute (beats per minute, or bpm). The heart rate varies according to the body's physical needs, including the need to absorb oxygen and excrete carbon dioxide.
Sleep-related breathing disorders, such as sleep apnea [1] [2] Sleep-related seizure disorders [1] Sleep-related movement disorders, such as periodic limb movement disorder, which is repeated muscle twitching of the feet, legs, or arms during sleep. [2] [1] Sleep studies may be used to diagnose or rule out restless legs syndrome (RLS). However ...
Children with obstructive sleep-disordered breathing also show a faster heart rate during wakefulness and during sleep. [74] In adult patients, OSA has been shown to be associated with insulin resistance. [75] In children, metabolic consequences of OSA are complicated to assess as they can also be associated to puberty and obesity (if present ...
A hallmark of sleep disordered breathing is the occurrence of arousals during sleep. Such arousals elicit generalized autonomic activation, which among other physiological changes, includes sympathetic nervous system-mediated peripheral vasoconstriction, and transient pulse rate elevation. The PAT technology allows measurement of these changes ...
Heart tissue infection also known as myocarditis -Complication of heart surgery; Hypothyroidism or an underactive thyroid gland [1] Imbalance of electrolytes which are mineral related substances needed for conducting electrical impulses; Obstructive sleep apnea which is the repeated disruption of breathing during sleep due to obstruction to the ...