I hope someone can help me. The right side of my heart is abnormally large. I have had a TEE (esophagus echo) where they concluded the cause is not APVR (misplacement of veins I guess).
My background: I am 30-years old and jog/run ~40 miles/week. 3 years ago, I started to feel lightheaded everytime I run, often around the 2nd mile, but the lightheaded feeling would subside as I continued my run. I did faint once (2 yrs ago) and was out for 3 min or so I was told. I did not feel lightheaded until 3 years ago, although I've been running for much longer than that.
My blood pressure is on the low end & my cholesterol is normal. My heart rate is on the low end - 42 was my last reading 2 days ago. Sometimes I have some abnormal spikes in my heart rate readings - other times it is normal.
I do not feel any shortness of breath when I exercise.
Does anyone know what could be the most probable cause of my symptoms (enlarged right heart & lightheadedness). I've been reading up on so many congenital heart disease possibilities but can seem to find one where my symptoms fit right. I would appreciate any help or advice! Thanks.
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