I am a 28 year old male, but for the last few years I've been suffering from a number of definitely or potentially heart-related issues. Firstly, I noticed that I have a very low heart rate - in the mid-high 40's bpm. I seem to get quite tired particularly when I sit down for a while, and I've noticed that this heart rate sometimes drops even lower, occasionally into the high 30s, and I start to feel particularly 'off'. I often get irregular heart beat at times like that, and also at some other times, which seems to consist in missed or half-beats, and lasts for perhaps 10-20 seconds, after which I sometimes feel light-headed or sick. I've been to the cardiologist several times as I think something is wrong with this, and they did some ECGs etc. They said that I have some hypertrophy, but other than that don't seem to think that there's anything seriously wrong. However, given the above, I'm not sure I agree with them.
Does anybody have any thoughts on this?