Enlarged left ventricle

What causes an enlarged left ventricle on an early 30's man who is very healthy and excercises regularly.

[Jerry_NJ]

I assume you have a fact based question, such as the results of an echocardiogram, and analysis by the technician and cardiologist.

An enlarged heart can be congenital, result of high blood pressure (but I think that would take more than 30 years), and it could simply be a result of extreme exercise... the last point is a guess-from-memory that has the least credibility - but I offer it in case the subject is a marathon runner or similar.  "Regular" exercise would not cause such, I believe.

What did the doctor say, was there any concern, or just a statement of the fact?  Enlarged left atrial can cause atrial fibrillation, not sure what symptoms, if any, would go along with an enlarged ventricle.  

[grendslori]

It would also be important to know if the wall of the left ventricle is too thick or too thin.