How do single chamber leadless pacemakers actually work on sinus node dysfunction
I was just reading about the new single chamber Micra AV leadless pacemaker. It says that it provides most of, but not all of, the function of a dual-chamber pacemaker. The one thing that it's lacking is "atrial stimulation, which would be for people who the atrium doesn't beat fast enough, such as in sick sinus syndrome or chronotropic incompetence". In that case, you would still need a leaded pacemaker in order to address these problems.
I have a single chamber Micra Transcatheter Leadless Pacemaker (the model before the new Micra AV). This got me thinking, how is my pacemaker recommened for sinus node dysfunction (as in my case) when the Micra AV isn't?