I am a 23 year old female. 5'3", 105 lbs.
In 2011, I began having issues with rapid heart rates at rest and on exertion along with other symptoms that seemed more neurological in nature. I had a battery of tests, and all came back normal. Heart and brain totally fine.
I met with an electrophysiologist and was diagnosed with IST, and had a sinus node modification in March of 2012. It has left me with incredibly frequent low atrial/junctional ectopics, bursts of paroxysmal tachycardia, episodic bradycardia (low as 42 while awake), and as of late I am having sinus tachycardia on exertion even worse than before my ablation (upwards of 150's-160's).
More troubling, I seem to be having what I think is angina-type pain and discomfort, as well as more shortness of breath. I've had a centralized ache in my chest, an almost shooting-type pain in the left side of my neck, and pain in my upper back. I've also had at times intense pain that will seem to travel down my inner-left arm.
I have a wrist BP monitor, and I got curious a few nights ago while I was lying in bed (I hadn't been to sleep yet), so I checked my BP. It was 73/42 with my HR 85. Now I know I am a small, very young woman so having a lower BP is definitely not out of the norm. But I have NEVER seen it that low. I took it a three more times, making sure my arm was in the right spot, with similar results. It's been the same every night. If I sit up, my BP rises to the low 100's/60's within a minute or so.
My blood pressure during the day is normal: 100-115/65-80
Is it at all possible that my blood pressure is too low at night and doing some kind of damage, even with zero heart disease? Could my arrhythmia exacerbate this?