hi,
thank-you for providing the brief history.
well , it is one way good to hear that your husband do not have any systemic pathology. and all thanks to God.
now since his pain is the symptom which is worrying him, it will be more or w muscular. pectorals muscle takes its origin from the centre of the chest upto the shoulder bone. So if the muscle is having a pain it cannot be traced by a diagnostic tests performed.
also to get rid of this pain, the only thing to try as per me is slow gentle
massage, then breathing exercises. Also breathing exercises of done with all different types of it will help the muscle stronger and avoid pain in future.
Also, diagnostic are not an accurate diagnosis. They are used as a means to come closer to diagnosis.
Since muscle physiological keeps varying tracking it will be little tough. May be an unnatural electrical impulses which are imbalanced between the muscle activity and the functions might have caused this.
but still it's not to worry as the diagnostic tool have given a positive chit for the heart and lungs.
I request you to perform regular breathing exercises and with the grace of God all will be fine.
for time being avoid jumping activity. just to be safe.
rewards