Where are pacemaker cells located

Common Questions and Answers about Where are pacemaker cells located

pacemaker

Pacemakers are very effective and very reliable, but of course they are not as good as the native pacemaker. The pacer has to be followed by your doctor to make sure that the leads and the battery are working well. With the current technology a lot of this can be done from home with the use of your telephone.
(I had my thyroid radiated 15 years ago) I actually had the opposite effect. I was on Synthroid 100 per day 150 on M/F plus a compound of .12.I turned 50 in January, and I didn't have a period since February. I thought it was my menopause changing time. My hair was thinning, no sleep, my skin terribly dry. However, this month since November 1st I've been on the Tirosint. 100 per day 113 MWF plus the compound of .13. Low and behold my period returned.
The spread of electricity throughout the heart muscle is possible because all heart muscle cells, not just pacemaker cells, are excitable. Usually, the heart muscle cells keep time more slowly than normal pacemaker cells. This allows the pacemaker cells within the SA node to be in control of generating and pacing the heartbeat.
A low atrial rhythm refers to where the heart's pacemaker is located. There may be several different pacemakers and when the rhythm is coming from one lower in the atrium it is refered to as a "low atrial rhythm". NSR means normal sinus rhythm and atrial escape rhythm refers to a slow atrial rhythm. All of these are normal.
The spread of electricity throughout the heart muscle is possible because all heart muscle cells, not just pacemaker cells, are excitable. Usually, the heart muscle cells keep time more slowly than normal pacemaker cells. This allows the pacemaker cells within the SA node to be in control of generating and pacing the heartbeat.
The stimulus for a heartbeat starts in the wall of the right atrium where the heart's pacemaker, the sinoatrial, or SA node (1), is located. The pacemaker generates an electrical current, and this wave of electricity spreads through the right and left atria (2). In response the muscles of the atria contract and force blood from these upper chambers into the lower ones, the ventricles.
But other cells on the heart are also capable of initiating the heart beat by discharging. These cells can be located in the atrium or ventricles on your heart, and are usually irritated for some reason, causing them to electrically discharge at undesired times. Imagine that the small x is a normal beat and the capital X is the PVC.
And no, I don't feel my brain cells increased, in fact I used to have an IQ of 146, now the last time taken while on heavy dose 300 mg's of Codiene, 10 mg's of Klonopin, it registered 79! Where are all those extra brain cells??????? Was the test accurate, some feel not. Were the drugs interfering many say yes, but I now know fluent Native American from the seizures. That is the only good thing I received from them. I have to take the Klonopin to keep from seizing now. The Codiene I quit.
I am a paramedic and so is his father neither one of us is very familiar with children suffering from SVT. We are going to see a pediatric cardiologist on Monday and I would like to have some ideas in my head as to actions. I have been doing a bunch of reading and it appears radiofrequency ablation is the best option however I have not seen very much on children. Do you think it is safe for children or are medications a better route?
ahhh ok that makes sense now, I thought maybe you had a pacemaker or ICD. There are some with FM who also have pvc's or other arrhythmia's; my dr suspects FM or CFS along with other issues I just haven't gone to get it all confirmed. oh I'd like to switch places with some of the dr's I've seen in my lifetime too hehehe :P that's why I didn't get help alot sooner with major problems that were dangerous. I had dr's and patients ask if I felt 50,000 pvc's; and I ask how could I not?
Well, I think I have a super irritable heart and the extra pacemaker cells are there and they want to join in the fun when adrenaline comes to the party. Very unscientific explanation, but this is what I think happens with me. High adrenaline levels don't irritate other hearts because they don't have an irritable heart that has pacemaker cells where they shouldn't be....
I think, judging from research, this will be available in the next decade. Research is also investigating growing new valves for transplantation. Now stem cells are more understood and we can eliminate the problems of rejection, the sky is the limit.
I know my doctor had to be forthcoming about the fact I may come out of it needing a pacemaker but that is actually pretty rare. Especially now they have ways once they are in of telling how close it is to the avnode and then they just choose not to ablate. But the risks from this procedure are very low with very high success rates compared to other procedures especially avert.
Where are you having your ablation done?
That said, if yours are as strong as they were right after the ablation it may be due to the fact that you still have bouts of svt or it could simply be where they are located. Sometimes when they get going they can just have a mind of their own. And like I said before if the pvcs are getting really bad really see if you can jar them loose by cough or something. I really do think they kind of get stuck in a pattern like the svt did. Everyone's heart is different.
You are describing the exact internal vibrations I experience. As I understand it, these may be coming from foci themselves (probably located in the pulmonary vein connections to the back of the heart). Several people have commented that they experience this very uneasy sensation. Early on, when my PACs first started, I did notice a nervous feeling centered in my chest, but did not think much about it.
When the charge is released, you get a heart beat. Now, besides the cells that make up our circuits, there are islands of electrically active cells distributed throughout the heart...most of these amount to nothing, since they're not close enough to any of the normal circuits. But, some of them may be close enough to cause an occassional problem.
When the left atrium is not beating (during a-fib), the clots usually just stay where they are, but when the atria are beating again, clots may break off the walls and follow the blood stream. Risk of clots increase after 48 hours of untreated a-fib, which is why you need 3 (4 in Norway) weeks on anticoagulants before cardioversion. Often a TEE (esophagal echocardiography) is performed to check if clots have formed in the atria before cardioversion.
so, we all end up with hearts that contain electrical cardiac tissue embedded in areas of the heart where only structural cells are really needed. Since this arrangement does not affect our ability to procreate, we have evolved with these islands (foci) in place. Most of the time, they are isolated and really don't affect anything. In some folks, unluckily, they may be located near enough to the normal lines of conduction to produce arrhythmias from early on.
you have to really be careful posting a warning such as you posted on this website!! There are SO many people that come here already very, very VERY scared and confused ( me included, at times) and to read a post like yours, that is confusing and has no other info to back up why you made the statement, can cause panic. I have seen 2 different cardiologists, both of which, over the years, have watched my heart during a stress testing, during PVCs and PACs, and say that all looks fine.
Any cardio or EP should be able to confirm that they are the result of firing of island(s) of electrical cardiac tissue located near enough to the pacemaker circuits to cause a premature beat. Not complicated. We all have them, some more than others. The current thinking is that these electrically-active islands are located in regions of the heart wall/PV ostia where only structural cardiac tissue is really needed.
It helps to go about business as usual and stay among friends...Don't know where you are located, but for me it is great to have power again and communicate with my buddies on the forum.....
However, some of these, because of where they are located (often near the atria, at the back side of the heart at the pulmonary vein entrance) are in such a position that their electrical activity (ion pulses) can occassionally reach the normal pacemaker system of the heart and cause a premature beat to occur.
incidentally, we had been having all kinds of tests done trying to figure out why the one child was always nauseated---but it was the rashes and where they were located that clued us in to the possibility of celiac---and that was because i had been researching rashes on the internet and ran across the description of dermatitis herpetiformis.
UPON A RECENT ECHO AND EKG, I WAS TOLD THAT THE RIGHT SIDE OF MY HEART IS ENLARGED, ALSO SHOW SIGNS OF VALVULAR DISEASE. THEY ARE SAYIING THAT 3 OF THE 4 VALVES ARE SHOWING SIGNS OF DISEASE.( DEFECTIVE). I ALSO HAVE M.V.P., AND A HEART MURMUR. I ALSO HAVE COMPLETE BLOCKAGE, IN THE UPPER CHAMBER. I WAS LED TO BELIEVE THAT I NEED SURGERY TO CORRECT THE WHOLE TO STOP THE RIGHT SIDE OF MY HEART FROM GETTING ANY LARGER.
An area on the shoulder is numbed and a small pocket under the skin is formed where the pacemaker is placed. Small wires lead from the pacemaker to the heart chambers. The entire procedure takes about an hour. Potential complications of pacemaker placement are bleeding and infection at the site of implant (<2%), infection of the pacemaker wires requiring replacement (<1%), pneumothorax (collapse of the lung <1%) and cardiac tamponade (fluid in the heart sack <1%).
Well that depends a lot on what kind of SVT it is, and where it's exactly located. But the odds are in your favor. Stick around and let us know how you make out. It's a piece of cake, very little pain, and you're up and around the next day. If you can get a sedative of anesthesia (as I did) during the procedure, it's even easier. Good luck!
However, I will say that I am not entirely sure these symptom, which are certainly related, are not present after the A Fib event. I am not sure whether the A/Fib is causing the gas/bloating and the asthma attack or the other way around. Another interesting symptom that happened to me was when I went to the ER with an A/Fib event. It took them 14 hours to gain control of my heart rythym. I had to urinate a lot. I'm talking quarts.
These scarred areas have damaged and dying cells in them, the blood supply shrinks, and the areas are not very dense - not as dense as the normal brain around them. These are the classic MS plaques and are considered old lesions. If the attack on the myelin sheath is too strong for the immune system to repair, more and more myelin disappears and the area of nerves eventually dies. Then it contracts and scars.
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