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single lead
- by aldeer
- 2013-03-02 01:03:58
- General Posting
- 1355 views
- 7 comments
Why do they just put in a single lead? Is it because of AV node block or A-fib? Just wondering as I have a single lead to the ventricle. aldeer
7 Comments
I have single lead
by janetinak - 2013-03-02 01:03:38
due to permanent Afib & an AV Node ablation. It paces my ventricles & is in the middle (septum). So as I understand it Afib doing its thing in the atria & as my ventricles only beat at about 40 b/m paced to 60-120 as needed. Then add Coumadin & I am doing good now for going on 13 yrs.
Hope that's clear.
Janet
A question for you plumbers
by ElectricFrank - 2013-03-02 11:03:06
How do the ventricles manage to do a reasonable job of pumping blood when they are being fed by a fibrillating atrium? It would seem that the loss of synchronization between Atrium and Ventricle would have a serious impact on pumping efficiency.
frank
Frank, I don't know the answer
by janetinak - 2013-03-03 02:03:04
to your question. But my EF is about 55-60% on two different test over the last few yrs. So I guess enough is getting thru. I was running about 150+ b/m ( not all captured by ventricles on EKG) before AV Node ablation
Janet
Atrial kick
by golden_snitch - 2013-03-03 06:03:55
Hi Frank!
80% of the blood flows passively down to the ventricles through the open AV valves (before the atrial systole), additional 20% due to the so-called "atrial kick". There is a loss of this atrial kick when the atria are fluttering or fibrillating, but since you have that 80% going down anyways, this loss sometimes isn't that problematic, especially not, if you have a good EF. But of course in patients with a reduced EF, the loss of the atrial kick leads to an even greater reduction of the EF, so that the patient might become more symptomatic.
Inga
That makes sense
by ElectricFrank - 2013-03-04 01:03:36
I hadn't heard of the "kick", but it makes a lot of sense. I wonder why they haven't come up with an Atriectomy. Just remove the bum atrium and put in a bypass.
I better keep quiet on that one. They will get the idea for a more expensive surgery.
frank
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Single lead
by golden_snitch - 2013-03-02 01:03:31
I guess because of the Afib. If you're in Afib all the time, the atrial pacemaker lead would just "sit" there doing nothing. It would be inhibited by the very fast electrical impulses traveling through the atria due to the Afib. Well, it could sense this Afib, but that'd not be of any benefit. Only if you had paroxysmal Afib, so occasional episodes but also long episodes of sinus rhythm, an atrial lead would make any sense.
Best wishes
Inga