my 44 year old sister is 3 weeks post op from aortic valve replacement , ascending artery anyerism and placement of a permanent pacemaker. during this time she also had allergy to heparin , HIT. she has had bouts of forgettfullness, becomes agitated and has thought s of suicide and depression which she did have prior. she took percocet round the clock and still today complains of pain , exteme fatigue and SOB. is this normal and how long can she expect to experience this? the family does not know if she is manipulating us or if she truly is experinecing these symptoms.