I give up trying to figure these things out

[erijon]

As I have posted, I have had a very bad few months of PVC's, they have been a real pain. So about a week ago, poof, they're gone. I mean no trace, not with exercise, not from transitioning, not from caffeine, stress, lack of sleep, nothing, just gone. I look for them and nothing.

I shouldn't be complaining but it just makes me wonder how long they'll be gone. I wish I knew what caused them to go away like this, I guess I should just be happy and move one but it makes you wonder.........

[Mom2four85]

I know what you mean, I've just about given up trying to figure out pvc's too...I really think they're one eyed purple people eaters lol

just when i think I understand and have answers; something blows the theory out the window...

[is_something_wrong]

You are right. I think potassium should be calcium, but not really sure. I've given up understanding the ion channels and pumps ;)

[yarrow]

"Further it seems that a lower heart rate makes the premature beats more prominent. "

The S-A node is the pacemaker because it naturally generates impulses faster than the other parts of the heart that have this capability.  In other words, a fast beat that originates in the SA node overrides impulses from other excitable cells.

When you're at rest, the S-A node sends out impulses less frequently, which gives the excitable 'rogue' cells an interval that permits a chance to fire a triggering impulse of their own.

I suspect the basic problem involves faulty operation of the sodium/potassium pump of some heart cells:  Sodium enters prematurely and depolarizes the cell membrane, generating an inappropriate impulse.  The 'why' is the big, unanswered question.

[is_something_wrong]

The same happened to me. Strange.

I've given up understanding what's causing a premature beat now and then. It seems I can be really stressed, with no premature beats, but I can be totally calm and actually experience more of them.

I guess it's the unconcious, underlying stress that may provoke them. If I see the big lines in the picture, I've had premature beats (PxCs, not sure if the x is an A or a V) the last months. My dad got dx with severe AAA. His surgery went well and he got out of the hospital. Premature beats more or less gone. But I feel really stressed these days, lots of stress at work, etc.

This has happened before, and suddenly, they are back, more annoying than ever. Maybe the underlying stress they cause, causes them? I don't know.

I had a theory that when I forget my multivitamins, they are less present, that vitamin D increased the calcium uptake, causing elevated Ca and more premature beats. But at some point I was dx with almost dangerously low vit D (when I tested the theory, not recommended) and the premature beats were still there.

Further it seems that a lower heart rate makes the premature beats more prominent. The ones I've been experiencing lately tend to squeeze between the normal beats, causing small "runs" which are really annoying. If my HR is 50-55, very little adrenaline is needed to provoke them. If my HR is 80, I almost never sense any premature beats. One should believe that a higher HR = more adrenaline but that's not necessarily correct. I love the feeling after exercise because my HR is slightly elevated due to low BP. Almost never premature beats :)

[beanhead2010]

Savor the moment!!!