Did your cardiologist go over your diet?
You may consider a more inclusive diet, because some meats have factors that are health healthy, that vegetables just don’t have in sufficient quantities.
Now, I had a heart attack five years ago, caused by a very rare heart defect, not clogged arteries, they are squeaky clean.
In the general cardiological work-up, I was told I needed to increase protein, I was not getting enough.
I also ate very little meat or dairy, no sweets or many carbohydrates, always just drank water, just ate mostly vegetables and fruits, just a preference, not any diet extremes on purpose.
It doesn’t take much meat, just a little a week is all that is necessary, so I try to eat some once a week.
It took the Drs some to find what to do to control the arrythmia I had after the heart attack, but now a minimal amount of a beta blocker and good management does the trick.
With heart arrythmias, it is many times a guess what it may be or may work.
It is normal to have symptoms of getting dizzy and almost or completely passing out when your heart is missing beats.
I would guess the exertion of getting on your horse is overtaxing your heart and that is why you get dizzy.
My problem, as they finally figured, after they sent me clear to Dallas for special tests, is that I have what they call an errant circumflex, a defective main heart artery, that supply it with blood to function.
That artery comes out of the wrong side, goes around between the two main arteries and then disappears into the heart, they don’t know where it goes.
Where it goes between those arteries, when I exert myself, it gets squeezed and so loses blood flow and that causes the problem.
So, I have learned not to stress or exert too much, keep it calm and slow and so no more dizzy spells.
I hope your problem is as easy to solve, but it could be anything, maybe the sinus itself and if so, they can do some heart ablation to regulate the rythm again.
Just keep after it until you have some answers, they can do wonders today, truly.
Try not to get discouraged because for a spell you can’t do what you want, take this time to rest and do what you can, later you will catch up.
Remember, fretting is contraindicated when you have a tricky heart, so take a deep breath and try to think positively only.