3 weeks ago while at work, I developed sudden onset tachycardia (ranging in the 120's). In addition, I had neck, left shoulder and left sided chest pain, a flushed feeling, shortness of breath, dizziness and I felt somewhat disoriented. I felt fine one moment and the next moment I felt acutely ill. I was working at my desk the entire time. I have a history of idiopathic cardiomyopathy and pericarditis. My symptoms lasted about four hours, resolved for a couple of hours, and then returned for an additional 45 minutes. I have not had any symptoms since the last episode. Last summer an echocardiogram did show some type of abnormality with the apex of my heart, so a cardiac cath was ordered, which came back normal. In addition, I was diagnosed with Type I DM 10 years ago (at the age of 38) as well as hypothyroidism. I work in a doctor's office as a CMA so I do have a medical background. After an EKG was performed, I was sent to the hospital via ambulance. While in the ambulance, after the administration of a bag of fluids, my BP dropped to 76/48. My blood sugar rose to 500 and it did take 24 hours just to get it back down into the 200 range. At the hospital, I was tested for a pulmonary embolism and my cardiac enzymes were checked. Everything came back negative. The only rationale they could come up with was that my TSH was low (0.04) which was probably due to a recent increase in my Synthroid dosage (interestingly enough, one doctor thought the symptoms were all muscular related - I do wonder where she earned her medical degree). However, my endocrinologist does not feel this was a cause for my symptoms as they were of a sudden onset. My cardiologist has no explanation either. Unfortunately, while in the hospital, he was not contacted and therefore, he was not able to review my EKG.
Is this something I should be concerned about? I am far from an anxious person and it is very unlikely that I would ever have a panic attack. This has never happened to me before and I am concerned that this may happen again.