Thank you for your response.
There is only one possible sudden death of a young person in our family - my nephew drowned.
I fainted a number of times as a teenager; the last faint being age 18.
In August I had an episode where my heart dropped to 42 with an irregular rhythm, which after a few minutes became very fast. I was admitted to hospital where they said my pulse was slow and blood pressure low, but otherwise all was fine.
Since then, I regularly feel dizzy/lightheaded when my heart is going very slow (below 55) or fast (above 130). My heart-rate before the last few months was around 80, so this slow pulse is new for me.
I had an event monitor a few weeks ago which showed 'unifocal ventricular ectopic beats'.
I have been taking 5mg Bisoprolol since then, but I am still experiencing the ectopic beats, particularly if I have any strong emotion - happy, sad, surprised etc. I have many single, isolated ectopic beats during the day - but also periods of 10 plus minutes where it feels like it is 'sucking', 'missing' every couple of beats.
The cardiologist plans another event monitor in January.