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Doctor insights on: Biorhythm

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What governs our circadian rhythm ?

What governs our circadian rhythm ?

Light / dark: The brain takes in light in decreasing and increasing amounts depending on time of day and time of year, and a center in the brain, the suprachiasmatic nucleus, placed over the optic nerves, takes the information, and sets the "internal clock". This nucleus tells the pineal gland when to secrete melatonin, the hormone that tells us when we're supposed to get sleepy. ...Read more

Dr. Vikas Jain
832 doctors shared insights

Circadian Rhythm (Definition)

The circadian rhythm (biological clock) is the daily cycle of physical and mental activity in the body, based on a 24-hour period. The circadian rhythm helps regulate a person's sleep/wake cycle, and is affected by variations in the environment, such as the amount of daylight, the length of the night, the ...Read more


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Why our circadian rhythm changes its pattern sometimes?

See below: By definition, a circadian rhythm can be adjusted/reset by external stimuli. The best example of this is changing of our sleep schedules after overseas trips. ...Read more

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How do circadian rhythms works?

Endogenous: A circadian rhythm comes full cycle every 24 hours. It is endogenous but believed by many to be influenced by the position of the moon to the earth. ...Read more

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What are circadian rhythms?

What are  circadian rhythms?

24 hour cycle: Circadian rhythms are cyclic changes in organism in response to lightness & darkness occurring every 24 hours. ...Read more

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How does melatonin relate to circadian rhythm disorder?

How does melatonin relate to circadian rhythm disorder?

Melatonin: Melatonin feeds the system in regards to pineal glad. Melatonin is the "anti light hormone" so when our body should be preparing for sleep at night, melatonin is secreted telling us to prepare for sleep. What it is not is a sleep aid. Taking supplemental melatonin can be helpful if we are relatively difficient or are trying to iatrogenically adjust our rhythm (shift work, jet lag, etc). ...Read more

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Will low vitamin D3 levels disrupt the circadian rhythm?

Maybe: Vit d has so many affects in the body that disrupted circadian rhythm could be a possibility. It is not one of the symptoms we look for to diagnose vitamin d deficiency. Best way to find out for you is to take vit d and if your circadian rhythm improves with just that then yes it affected you. ...Read more

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Is shift work sleep disorder the same thing as circadian rhythm disorder?

Is shift work sleep disorder the same thing as circadian rhythm disorder?

One type of: Circadian rhythm sleep disorder is a persistent or recurring pattern of sleep disruption resulting either from an altered sleep-wake schedule or an inequality between a person's natural sleep-wake cycle and the sleep-related demands placed on him or her. the dsm-iv-tr lists four types of circadian rhythm sleep disorder: delayed sleep phase type, jet lag type, shift work type, and unspecified type. ...Read more

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Sinus Rhythm with RBBB with LAFB withBifascicular Block,left axis deviation. HR 59 BP normal,little dizzy?

Sinus Rhythm with RBBB with LAFB withBifascicular Block,left axis deviation. HR 59 BP normal,little dizzy?

Dizzy: You have some evidence for heart electrical blockage on your EKG. This make at higher risk for heart block. Would expect pauses or slower rate if problem. Is dizziness spinning or do you feel you might black out? First symptom vertigo second more concerning. ...Read more

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30 day event recorder=sinus rhythm tachycardia, experiencing daily lightheadedness, dizziness,fatigue,palpitations,short of breath. What's happening?

30 day event recorder=sinus rhythm tachycardia, experiencing daily lightheadedness, dizziness,fatigue,palpitations,short of breath. What's happening?

Symptoms = possibly: related but these are far too complex issues & relationships to be dealt with in such a limited interface as HealthTap. Be aware: (a) you are in charge of your life & health, not others & (b) how the medical industry operates: http://goo.gl/Blh6rW, rarely addressing causes; only treating body symptoms. Plaquenil & methotrexate=typically prescribed for autoimmune problems such as Lupus. God Bless! ...Read more

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Holter- 24 run superventricular events 20 beats 88bpm 3 beats 99 BPM 5 beats 86bmp. Longest rate 128 BPM 0:01:48. Echo, ecg, angio normal. Concerned?

Holter- 24 run superventricular events 20 beats 88bpm 3 beats 99 BPM 5 beats 86bmp. Longest rate 128 BPM 0:01:48. Echo, ecg, angio normal. Concerned?

No need to worry....: Findings appear benign. You do not have any structural heart disease or coronary artery disease and have benign electrical findings based upon the information provided. However discuss with your cardiologist. ...Read more

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What are circadian rhythm sleep disorders related to sleep paralysis and nightmares?

What are circadian rhythm sleep disorders related to sleep paralysis and nightmares?

Sleep disorders: Sleep phase disorders may need to be diagnosed via sleep study and usually require really expert coaching to correct. Nightmares and often also sleep paralysis can easily be addressed with my No More Nightmares training. Please contact me if you request further details. ...Read more

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On ECG results rightward axis boderline ECG nornal sunius rhythm?

On ECG results rightward axis boderline ECG nornal sunius rhythm?

Possible hemiblock: An abnormal right axis plus minimally prolonged qrs duration defines what is termed a left posterior hemiblock (block of the posteroinferior fascicle of the left branch of the bundle of his). An abnormal right axis can also occur in conditions with elevated right heart pressure and resultant right ventricular enlargement. Normal sinus rhythm means no rhythm disturbance. ...Read more

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Shift work sleep disorder, or circadian rhythm sleep disorder--how do I know difference?

Shift work sleep disorder, or circadian rhythm sleep disorder--how do I know difference?

One type of: Circadian rhythm sleep disorder is a persistent or recurring pattern of sleep disruption resulting either from an altered sleep-wake schedule or an inequality between a person's natural sleep-wake cycle and the sleep-related demands placed on him or her. the dsm-iv-tr lists four types of circadian rhythm sleep disorder: delayed sleep phase type, jet lag type, shift work type, and unspecified type. ...Read more

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ECG Result: Vent Rate 115, Atrial Rate 115, P-RInt 128ms, QRS dur 096ms, QTint 326ms, P-R-T Axes 068 081-01 degrees, QTc Int 450ms. Anything abnormal?

ECG Result: Vent Rate 115, Atrial Rate 115, P-RInt 128ms, QRS dur 096ms, QTint 326ms, P-R-T Axes 068 081-01 degrees, QTc Int 450ms. Anything abnormal?

Tachycardia: The ekg demonstrates sinus tachycardia as the normal resting heart rate should be less than 90. In addition the qtc interval appears prolonged but the regular qt interval is within normal range. There is no description of morphology in this report and I wonder what the overall conclusion by the ekg reader was. Have a cardiologist read the ekg for you. ...Read more

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Working irregular shifts. Days/nights mixed up, sleep not restful. Too restless for melatonin to work, too fatigued to stay awake to reset schedule?

Working irregular shifts. Days/nights mixed up, sleep not restful. Too restless for melatonin to work, too fatigued to stay awake to reset schedule?

Sleep hygiene: Best way to reset your clock is to start sleeping at regular hours. If switching shifts cannot be avoided, planning for expected changes in shift schedule like lighting adjustment and sleep hygiene with darkening the room, avoiding noise and blue light before sleep time will help. ...Read more

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SMC / ANALYSIS OF A 48 HOUR HOLTER SCAN FOR "RACING HEARTBEAT": Underlying rhythm is sinus. Heart rates range from 69 BPM (asleep) to 173 bpm(unknown?

SMC / ANALYSIS OF A 48 HOUR HOLTER SCAN FOR "RACING HEARTBEAT": Underlying 
rhythm is sinus. Heart rates range from 69 BPM (asleep) to 173 bpm(unknown?

More info....: The heart rate of 173 bpm is fast and meets the definition of tachycardia. The next question is what was the rhythm when your your rate was 173? So, to make this diagnosis and then decide on treatment based on this diagnosis, you need to see a cardiologist. The cardiologist can look at your monitor results and decide on what to do from here. Good luck!!!! ...Read more