I was recently diagnosed with hypertrophic obstructive cardiomyopathy. I have had symptoms of a resting heart rate of 99-140, chest and back pain - sharp and squeezing pressure, pressure in my chest, back and left arm, migraines, dizziness, fainting, large dips in blood pressure, nausea, sweating, and shortness of breath. I am on disopyramide 300 mg per day and still symptomatic. I had 3 echos done and 3 xrays to confirm. I collapsed at work and was sent to the heart hospital and had a heart cath done and my cardiologist said that I did NOT have HOCM as orginally thought as the "structure" of my heart was ok. My heart is enlarged though so what does that mean? What else can cause the left side of my heart to enlarge like that? I have no blockages and my cholesterol is fine. Any ideas??