26 is a bit young to be experiencing cardiac related issues, even if there is a history of illness in your family.
Best move you can make is start doing some regular exercise and cardio, coupled with a healthy diet and you will significantly increase your quality of life.
I've never tried sub-ohming before, mayb one day. For me , I still need a bit of a throat hit else i'm not satisfied.
Has to be a good balance between TH and flavour. I won't survive on flavour alone.
I came across this link over the weekend regarding sub ohming. The part that stood out for me was this
Source : http://www.e-cigarette-forum.com/forum/rebuildable-atomizer-systems/562106-ecf-sub-ohm-advisory.html
Is this an over precaution, or is there any truth is in this?