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1308034 tn?1337644984

What does PVC's stand for?

Just wondering what that is. I was given the 24 hr holter monitor for palps and severe tachycardia. My doc told me all was good. But that I had 145 extra beats from my "pacemaker" (figure of speach) being over active? Dont have a pacemaker. What do you think he meant?
Best Answer
1339332 tn?1329854366
Hi Ally,

It is true, as others have told you, that PVCs are "Premature Ventricular Contractions", early beats that originate in one of the two lower chambers of the heart instead of in the sinoatrial (SA) node in the R upper chamber (atrium) of the heart which is the heart's normal "natural pacemaker".

More often, thyroid disease or thyroid medications cause "supraventricular" or "atrial" dysrhythmias meaning extra, abnormally fast or slow, or irregular rhythms that originate above the level of the lower chambers. (They can originate in the SA node, the atria, or in another node, the AV node, that transmits the signals from the upper heart chambers to the lower heart chambers.) It is less common for thyroid disease/meds to cause ventricular dysrhythmias, but it can happen. PVCs can also occur in NORMAL, HEALTHY PEOPLE WITH NORMAL, HEALTHY HEARTS.  PVCs can be caused/or worsened by anxiety (which releases stress hormones that can overstimulate your heart) or other stimulants (such as caffiene in coffee or cola, etc., tobacco, recreational drugs, etc.).

When looking at whether the PVCs are indicative of a serious problem, doctors look at the patient's age and general health. (PVCs in older adults is usually more likely to result from hypertension and heart disease than PVCs in younger people.) They also look at the FREQUENCY of PVCs (<30 per minute is considered to be only "occasional" and not likely to indicate serious disease; if you had 145 in 24 hours, that's only 6/minute), the SHAPE of the PVCs (if they all look identical on the EKG, they are called "unifocal/unimorphic" and are likely to come from one overactive site in the ventricle vs. "multifocal/polymorphic" which are ones that differ from each other & suggest more than one area of the ventricles is overactive), and the PATTERN of the PVCs (whether they occur individually, in pairs, in runs of 3 or more or in other repetitive patterns).

I've pasted a couple of sites that may be helpful to you below. (As always, the doctor who's most familiar with your full medical history is the best source of information.) One is an article aimed to medical professionals, but I included it just so you could see the "rating system" that many medical professionals use to determine how serious PVCs are. I also posted a MedHelp link to a cardiologist who has answered similar questions from members in the past. You may wish to ask his/her opinion about your situation. Hope this is helpful. (SkyDiveDiva/MaryMac)
http://www.medhelp.org/posts/Heart-Disease/Frequency-of-PVCs/show/250087
http://emedicine.medscape.com/article/761148-diagnosis
http://emedicine.medscape.com/article/761148-overview
http://www.mayoclinic.com/health/hashimotos-disease/DS00567 (I included this because it mentions that thyroid hormones can cause heart arrhythmias (just another name for dysrhythmias).
14 Responses
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1308034 tn?1337644984
Thanku for the correction Mary :)...and for putting my mind more at ease. Hope ur well
Helpful - 0
1339332 tn?1329854366
CORRECTION TO PRIOR POST:

Oops! I meant <30 per HOUR is considered "occasional". And your test showed 6 per HOUR...not per minute! :) The important thing is your's are not frequent enough to be considered dangerous---though that doesn't make they any less annoying/scary!
Helpful - 0
1377571 tn?1283255303
Its true that when I started taking thyrornome I had more pvcs but not more than I have now that are daily. I had no problem with T3 or T4 hormones only TSH was at 7! Maybe its the thyrormone you think that doesn't let my heart to calm? Since last year We ve found the dose that make my TSH keep in low levels but my not my heart also..Except from the heart problem from the thyroid I also have much stress..that doesn't help my heart
Helpful - 0
612551 tn?1450022175
COMMUNITY LEADER
Yes, I was born in the USA, the state of Colorado. As my "signature" suggests, I now reside in New Jersey.  

Small world, I also know a family in South Africa, guess it must have been at least 5 years ago when I last saw them on their visit to this area.

During my career life, now retired, I travel around the world, mostly to Europe.

The Bryson book on Australia I mentioned is titled:  In a sunburned country - copyright 2000, so its now 10 years old, but much must be nearly the same. Bill is a great author, you may find the book interesting as it gives you an idea of how Australia looks to a visitor.  It is the kind of reading too that can take one's mind off of non-productive thinking.  He has written several other USA best sellers.  I think he is British, but has or does live in the USA - forget as I haven't read any of his books in a few years. A book titled:  A walk in the woods is also quite entertaining and describes Bill's attempt to walk the "Appalachian trail" in the USA.  A trail along the Appalachian mountains in the Eastern USA.  Not the most rugged part of the USA, but still a very difficult "hike", or as he called it "a walk in the woods".

Just some ideas, hope they or other ideas help you cope and get well.  
Helpful - 0
1308034 tn?1337644984
Hi there!
Thanku for the advice, I guess u understand what hashi's can do to you then. Did your heart have a hard time adjusting to thyroxine? It gave me bad tachycardia. And I'm having a bit of trouble converting my T4 to T3. But because I'm so sensitive to thyroxine I cant take extra T3 which is what most people do when they have a converion problem.

Are you thyroid symptom free now?

Helpful - 0
1377571 tn?1283255303
Hello I also have hashimoto and mvp. My cardio told me that these two factors are the cause of my pvcs and not to worry about. Im also under a beta blocker . It took me 1 year to calm tsh. Not to worry I ve had many hundreds of pvcs during a day and the next one I may have only a few. Is related to stress also and stress ia related to hashimoto so clm down as much as you can
Helpful - 0
1308034 tn?1337644984
Aww Thank you for your kind words Jerry :)

I'm not 100% better yet..but getting there. Thyroid problems can really wreck havoc on ur body and mind. The psychological damage that was done was pretty severe, so I'm still healing from anxiety..which at one point was debilitating. Just don't know if palps are a result of under active thyroid or anxiety. Your right about keeping my mind as active and positive as possible. Otherwise it all just snowballs doesn't it.

I think Australia is a good place to live and work too..I haven't lived or worked anywhere else so its all I know lol. Well actually I was born in South Africa and came to Aus when I was 3. But im glad u liked it!

Are you American? That's a country I have to visit still someday!

Well hope ur well. Take care :)

Helpful - 0
612551 tn?1450022175
COMMUNITY LEADER
You look to be in great physical condition, a beauty (said as a grandfather) - so it is my guess you have good health other than what was noted here.

I'd bet on you getting better if you can find some activity for your mind that puts you on a relaxed positive "plane" - anxiety makes thing worse in all cases.  Find what make you anxious and deal with it or put it in the trash can.

I have been to Melbourne once on business, about 1995.  Australia is one of my favorite countries and I had several business colleagues there at that time.  It seemed to me to be a great place to live and work.  I enjoyed a book by Bill Bryson on Australia that made me want to visit some of the "out back" areas.
Helpful - 0
1308034 tn?1337644984
...but after reading other peoples heart rhythm issues...I feel I shouldnt really be complaining.
Helpful - 0
1308034 tn?1337644984
Thanks for the info.

I am on propranolol for the palps. My doc says its just stress related. Im just sick of having them. They give me bad anxiety
Helpful - 0
967168 tn?1477584489
Allyc27 I'm not sure on the thryoid condition; ask or call your doctor or if you don't see him/her awhile start making notes of all the questions you think of - also the expert section is a good place to ask that if you get your question in time they only take a limited amount of them.

I can only tell you what I've read the answers to be or what my doctors have said.  Typically they treat anything between 6,000 - 8,000 pvc's in a 24/hour period with meds and anything above 15-20% of your total daily heartbeats (100,000 hb/24hr is usually normal) so 15,000 - 20,000+ they look at treating with surgery

that being said, there are alot of extinuating circumstances where they may do things a bit differently because of other medical problems or existing heart problems
Helpful - 0
1308034 tn?1337644984
Thanks for ur reply Lisa :) I will definitely do some googling

I have hashimoto's disease.. under active thyroid condition. My cardio problems only started once my thyroid went down hill. I find it extremely difficult to tolerate thyroxine and so am still under active.
What would be the amount of pvc's that would not be ok?
Helpful - 0
967168 tn?1477584489
Your doctor meant your heart's natural pacemaker :P = SA sinoatrial node or sinus node

PVC = premature ventricular contractions

google either and you'll get tons of info on them; 145 pvc's in a 24/hr period is ok in a structurally ok heart, unless you have other problems?
Helpful - 0
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