am a 59 yo male with known heart problems IE: 8 heart attacks, 1 stent in RCA,, ICD placement CHF COPD lately i been really tired,, no energy ,, light headness,, for getfull at times,,, will sleep 12 -16 hours daily,, do not sleep well at night time toss and turn alot,, can any of this be related to Hyprothroidisum or just my thyroid ? This Friday i will be admitted to the hospital to have my ICD re-programmed ( NIP procedure). a outpatient procedure. Thank you for any help or advice to ask my physican ? John