Thank you for asking your query. I will try my best to help you with your health concern.

From your description I understand that you are concerned about the numbness in the arms and hands and its possible association with a heart problem.
It’s true that in a case of sudden heart attack (Myocardial Infraction) there can be a pain in the arm, especially in the left arm. But vice versa is not true. A pain or numbness in the arms and hand alone is no reason to suspect a heart disease.

This numbness radiating to face, while exerting strongly suggest the involvement of a nerve or a group of nerve. The calicific tendinits and related problems cause can cause these symptoms. If the pain is really troublesome this needs to be further evaluated.
But let me assure you will that this pain in the arm and hand does not indicate any heart disease. Without a clinical examination I usually hesist to give a solid opinion, but in your case after going through your description I can certainly rule out heart disease.

You did the right thing by opting for a stress test and Ultrasound of shoulder. Since you are 50+ and have mildly elevated blood pressure and cholesterol levels, it’s better to be sure about your cardiac status,
Hope this helps.
Thank you