Need advice

[Caril in Indiana]

After months of increasing fatigue, I began breaking into sweats upon exertion or stress and my hands would tingle when the sweats occurred.  I have had 4 instances in last 8 months of double-vision lasting from 2-10 minutes. I am Diabetic, controlled by diet and have been diagnosed with Fibromyalgia.  My GP discovered a palpitation and ordered a 24-Hour Holter that documented my HR ranged from 40 to 140 BPM without exertion and I misfire at times in the top and bottom. I was scheduled to have an Echo and set up with a Cardiologist but before first appointment I presented at the ER with pressure in chest and High Blood pressure. After being admitted my HR went down to 34 on meds, I was diagnosed following a cath with Viral Myocarditis.   After a  CMRI, my diagnosis was changed to Mild Nonischemic Cardiomyopothy.  BP fluxuates. I am being treated for High Blood Pressure but at various times of the day my BP drops to 90/70. The CMRI indicated that my EF was 47%.  
Prescribed treatment was 5mg. Lisinopril, 81mg. aspirin and diet change with another echo in three months.  The pressure and chest discomfort subsided about 505 but recently began having periods of lightheadedness.  Lisinopril was reduced to 2.5mgs as of yesterday and I am now supposed to be checked by nurse on 11/5 and will see the Cardiologist again on 11/14.  I am very symptomatic and have not been able to return to work.  I am currently in process of applying for Disability.
My BP has ranged from 151/103-HR 80 to 89/73-HR 96.
The dizziness seems to be increasing.  Is this normal protocal?  Is the EF% always accurate or is it possible that during the CMRI my heart was higher functioning than it is at other times?  Any input will be greatly appreciated.

[Douglas Bogart, MD]

The CMRI is generally very accurate.  It would appear that you are sensitive to the medicine.  Ideally you should be on both a beta blocker and an ACE inhibitor (lisinopril).  The doses will need to be watched closely.  Likely they will follow your EF with a periodic echocardiogram.