Symptoms in hands are typical for Carpal Tunnel Syndrome. No, that is pure neurological and has nothing to do with your heart. I advise that you see a competent neurologist.

More likely a cervical stenosis issue, but cardiac causes would need to be ruled out as well as diabetes.

It is more likely a nerve problem than a heart problem. Awakening with the first three fingers numb or with pins and needles sensation frequently occurs with a pinched nerve at the wrist (carpal tunnel syndrome). And a similar sensation can be present in the feet if the nerves in both arms and legs aren’t functioning (a peripheral neuropathy).

Leon Rosenberg