Sleep is a chance for your heart to slow down, even though it has to keep working. Only a little larger than a fist, your heart works hard to pump about 2,000 gallons of blood each day. On average, your heart also "beats" (expands and contracts) 100,000 times a day.

When you first fall asleep you are in the non-REM stage. The non-REM stage of sleep is a time when your heart does not have to work so hard. About 80% of a full night's sleep is spent in this stage. During non-REM sleep, your heart rate, breathing and blood pressure all drop to levels below those that occur while you are awake.


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REM is the stage of sleep when you have most of your dreams. It is only about 20% of your total sleep time. Your blood pressure and heart rate can go up and down during this stage. If you have a nightmare that wakes you up, you may find that your heart is racing.

Sleep and sleep disorders both play a role in cardiovascular disease (CVD). The exact role that they play is still not quite clear. One thing that is certain is that there is a higher risk of sudden cardiac death in the first few hours after you wake up. This may be due to the amount of work your heart has to do when your body gets up and moving again. CVD is a leading cause of death in the U.S. It takes the life of nearly 2,600 Americans every day.

Several studies have shown that people with obstructive sleep apnea (OSA) are at a much greater risk of having high blood pressure. OSA causes your oxygen level to drop. Your heart beats faster due to the lack of oxygen. This causes your blood pressure to rise. Over time, this can lead to an ongoing increase in blood pressure. It is important to treat high blood pressure since it is a proven cause of other forms of cardiovascular disease. This includes heart attack, heart failure and stroke.

About 40% of people with CHF have a sleep disorder called central sleep apnea (CSA). CSA occurs when the brain fails to tell the lungs to breathe. As this signal is lost, the lungs do not take in the oxygen that your body needs. This happens most often as people are falling asleep. CSA also causes people to wake up many times in the night. When they wake up, their heart rate and blood pressure both rise.

Heart disease can affect your ability to sleep in subtle ways. People with congestive heart failure (CHF) often have a hard time falling asleep or staying asleep. This is due to the shortness of breath that is caused by CHF. This shortness of breath is often made worse when you lie down. The blood in your legs flows back into the heart. This can bring the heart more blood than it is able to pump.

Watch for signs that you may have a sleep disorder. Obstructive sleep apnea (OSA) is a sleep disorder that can put great stress on your heart. Men who are overweight and have large necks are most likely to have OSA.

Talk with your doctor about your risk of having a sleep disorder. This is very important if you already have high blood pressure or cardiovascular disease. People with congestive heart failure must be monitored for CSA and other sleep disorders. In contrast to OSA, people with heart failure and CSA are often thin and may not snore at all.

If your doctor thinks that you have a sleep disorder, he or she may suggest that you take a sleep study. This is called a polysomnogram. A sleep study is usually done overnight in a sleep center. It charts your brain waves, heart beat, and breathing as you sleep. It also records your eye and leg movements as well as muscle tension.

A sleep specialist will be able to see if there are any problems in the quality of your sleep. Your primary doctor is then given the results of the study. The two of you can decide on the best course of treatment. It is important to remember that sleep disorders are common and treatable. Treating your sleep disorder can help you have a healthier heart.

How is this possible? The arrangement of blood vessels at the back of the eye, known as the retina vasculature, is closely connected to the health of your heart. That means issues we see in the eye can be directly linked to health problems with the heart and the vessels in your body.

I've been having these for about 5-6 weeks now (some nights are worse than others) but generally its been more or less every night. This has turned into a vicious cycle because when you actually close your eyes at night to go to sleep you are actually waiting for the 'shock' to happen instead of trying to sleep. Obviously the less sleep you have, the less functional you are the next day and so on and so on. You then get sleep deprived which I believe also may trigger this.

While I agree anxiety can cause odd symptoms, it insults me when a physician jumps to a mental health conclusion, as if I just fell into this body yesterday and have no credibility in describing my experience with this. If I had anxiety, it would have shown up with a racing heart or elevated blood pressure spikes during the moments while the episodes were happening while I was in the hospital this last summer. My heart DID NOT race nor did my blood pressure spike as a result of these episodes. My cardiac events seemed associated with, but clearly "not in response too" the shock sensations. When these events happens I don't panic, instead I go into observer mode, trying to figure out the point of origin, which is not easy since it happens suddenly and only when I am in that twilight space dozing off. One doctor suggested I was dreaming! That really made me feel like slapping his smug, uninformed face. My reply was, "Sure doctor, I have nothing better to do than come in here and get poked by needles, irradiated by your tests and obligate myself to years worth of debt, sure great fun". He was not amused, but neither was I. They flatter themselves with the thinking "if I can't find it, it must be in the patients head". As if it isn't frustrating enough, we have to deal with this attitude from the physicians. Thankfully, not all are like this.

Hi! I also have been having increasing brain zaps/sleep paralysis for the past year. I've had them happen occasionally throughout my life, but much more rarely, and I've been through worse stress in the past than I am now. Your post interested me because you mentioned tinnitus in your left ear. I have recently developed the exact same thing, same ear! Last night as I was falling asleep, a zap hit me so hard it felt like someone shot a lighting bolt in the back of my head and it traveled forward through my arms, lol. I've had it happen while awake and relaxed as well, but very rarely. I've found shifting sleep positions will help when the zaps are a bit more relentless (I tend to get it while on my right side, and shifting to my back worked last night.) I definitely can correlate mine to times I've had less sleep than usual the night before, and also have wondered if it's a hormonal imbalance as I'm probably nearing menopause. My mother had a similar thing happen at about my same age. Anyway, curious if you found out about the tinnitus/if there's possibly a relation. I'm hoping the zaps haven't actually caused the tinnitus. I've read in some places that there's a theory it's actually a middle ear thing. hmmm

Been experiencing this for almost 2 months now... So exhausted! everything started at the end of June when experienced my very first panic attack (that's what i think it was tho...). after sleepless night and thoughts that I am dying or having a heart attack, the next day I went to meet my GP. He did ECG, got referral to Cardiologist for heart ultrasound but everything came out normal. Blood test showed elevated white blood cells (meaning my body was fighting some kind of infection), apart one night of a panic, i felt good. But after a week I got sinus infection. Tho no fever, physically felt ok, just stuffed nose, runny eyes, ear pain . It was more intense like for 3 days than mild symptoms staid for another 3... however.. since then I started to feel same brain zaps, electric shock or whatever it is!!! almost every night when trying to sleep... some nights were very bad... want to sleep but cannot as once I close my eyes-boom! so many sleepless nights... due to lack of sleeps my days, mood is affected too... Been 2 weeks now that I am experiencing tinnitus as well. Again just when going to sleep. Adding to this sometimes my ears feels full and clogged...

would love to know how you go ! im getting my heart checked next. ms ruled out from scans on brain and brain wave patterns normal. maybe consider nuerologist for yourself? could rule somethings out. will let you know how i go.

I have been experiencing this since I was a teenager (now 34). Just as I drift off, I get a very intense brain shiver (or ear drum warble type sensation) usually accompanied by sense of losing my balance or falling. sometimes this joined with a dream of falling over in slow motion of fighting a strange kind of paralysis. it usually lasts for a few seconds but it can be up to about a minute. I don't get a 'jolt' or 'zap' as such. but the intense brain shiver always wakes me up with a high heart rate and with a ringing in my ears (probably due to the high heart rate). this onset is definitely correlated with prior sleep deprivation in my case. I am an otherwise healthy male with no medical conditions and I'm not taking any medications. reading these posts helps to calm me down so thanks all.

Hello, I have been looking everywhere for something that has been happening to me but I couldn't find anything, but this thread is somewhat like what I'm experiencing. Maybe someone could give their input on why or what is happening. So sometimes when I sleep for a very long time or don't sleep enough I experience my whole body begin to tingle/vibrate/buzz. It's very hard to explain, but it's not like when your arm falls asleep and it begins to tingle, it's more of a very very pleasing tingling/buzzing. This can happen when I'm almost asleep or if I just wake up in the night and go to sleep again, but it happens when I 'am awake. Also i can kinda intensify it if I close my eyes harder or look up. When you close your eyes hard you can kinda hear it / feel it in your ears and that's the feeling * 100. 17dc91bb1f

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