This is probably a random question but google hasn't really confirmed either way. I have a heart arrhythmia (a type of VT) which follows a very specific pattern of good days and bad. Today should be a good day but it's not - could it be the weather? I shall double up on my medication today (I'm allowed to on the bad days) but it'll be the first time I've had to outside of the normal pattern so I'm curious as to what might be causing it.