Increase in right ventricle voltage threshold
Today my husband (83 yrs) had his annual pacemaker check at Kings College Hospital, London (UK). His single lead pacemaker was implanted in March 2018 for bradycardia, heart block (Mobitz II/Left Bundle Branch Block) and occasional loss of consciousness due permanent Atrial Fibrillation (AF) with a very slow ventricular response rate.
We were told he has 5.5 years remaining battery life, although this of course is only an estimate. He had no events (high heart rates) recorded. He has rate response on. He has been getting periods recently of near syncope, but nothing was picked up by his pacemaker as a potential cause. He is pacing in the right ventricle 80% of the time at 60 bpm.
The technician told us she had increased his Right Ventricle Voltage Threshold Output from 1.0 to 1.5, to give a better safety margin and more certainty of consistently capturing the heart and making it beat. The downside is that it might use up a little more battery. Is this small increase in threshold likely to cause any other problems, do you know, or is a 0.5 increase insignificant? Many thanks.