Test accuracy: Echo vs MRI

Earlier this this year I had an echo test which showed severe lvh. 2 months later I had an MRI and it showed no lvh. My question is, which is more accurate? I have a lot of symptoms linked to cardiac trouble (left chest pain/shortness of breath/arm pain) but my cardiologist says I have no serious heart issue. I have had ecg's which have showed problems which led to me being sent to a specialist yet I've had no explanations over the tests. My local doctor won't refer me again so I'm at a loss!
James

[itdood]

MRI is supposed to be more accurate wen evaluating structure, movement, perfusion...

Go to youtube and search fo "Cardiac MRI", it's amazing how well and MRI can image the heart even in motion.  

I had an MRI to assess for ARVD.  I posted the slice movies on youtube, check it out for yourself and you'll see it's an amazing tool.

copy and past into your browser  

http://www.youtube.com/watch?v=9Ab4vqdB4Vo

You can see wall thickness, motion, valves working, in detail.  

[ed34]

I can't see enough details to know if any tissue is damaged though?