Hi, I have a supraventricular heart condition, treated with digoxon until I had my first child 8 years ago, have been relatively asymptomatic since (no longer taking medication), but have notice constant tiredness for ages now, need to lie down after going for a walk/ride (often need to sleep/nap too). I am 37yrs of age now. I was told during diagnosis (age 23) that I also had a flow back of blood in one valve due to one ventrical being enlarged due to too much blood being forced through it when atria stopped pumping (this is apparently how my condition works in my particular case). Am wondering could this excessive tiredness indicate that the leak has worsened over time? I am 37 yrs old, 167cm tall, wieging 60 kgs, have two children (8 and almost 3 years of age).