So sorry that your husband is having all this problems. I'm no expert, but I was diagnosed with exercise induced LBBB during a stress test. I've had 24hr holter monitor, ECG's, MIBI test, and also angiogram or heart cath and all of them are normal.
I also have fatigue, nap during the day something I never did before, headaches, dizziness, chest pressure, fast heart rate and high blodd pressure. The doctors can't seem to find anything wrong.