Hi and Welcome to HealingWell, Jacton!!
I'm not exactly sure that I understand your question. Are you having problems with Arterial Spasms? The following article may help to explain that for you...
When you say you're O2, too...he wants you on oxygen, or are you on it already?
I've had a problem with arterial spasms in the past, and that can cause the artery to spasm to the point that not enough oxygen gets through to the heart. Is this what you have?
Please keep in touch, and let me know how you are doing!