In ventricular pacing, since the pm has no communication with the atrium, how does the ventricle know when to pace?

Plse Forgive my ignorance. I thought (wrongly?) this question may be of general interest and thus post it.

The question is : In ventricular pacing, since the pm has no communication with the atrium, how does the ventricle know when to pace?

I have been asking this question for quite some time and accidentally found the answer today, given below:

"Medtronic has recently introduced a leadless pacemaker that uses an accelerometer to detect atrial mechanical contractions and synchronize ventricular activation to atrial activity. Although it does not pace the atrium, it can restore AV synchrony in patients with competent sinus node function and high-grade AV block."

https://www.magellanhealthcare.com/documents/2022/02/advanced-imaging-digest-vol-2-iss-2.pdf/


1 Comments

the Pacemaker can tell the difference between

by PacedNRunning - 2022-11-07 16:27:29

For the leadless, the pacemaker is suppose to know the difference between muscle noise and atrial contraction of that muscle. It then times the ventricle paced beat off that signal. The issue with leadless is that it doesn't always sense the atrium properly and can cause dyssynchrony. This is why at this time leadless is not the best for those that need a good amount of V pacing.  Unless you are sedentary and sit around ALL day, this device won't work for someone active.  

It is a great device for those that need minimum pacing. 

 

You know you're wired when...

Your pacemaker receives radio frequencies.

Member Quotes

My cardiologist is brilliant and after lots of trial and error got me running. I finished this years London Marathon in 3hrs 38 minutes.