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I agree that having heart chamber + atrium + right atrium etc is not the best structure, scattering information too much. The fact that left atrium + left vertrical are a working pair, ditto right versions is not obvious enough though and should be clearly stated. This article despite being an overview does not currently make better reading than the the separate articles as they now stand.
I am not sure merging the atrium and ventrical articles into this one is necessarily the best solution though.
What is your overall proposal for the set of articles revolving around the heart? Please indicate more clearly what the full set of articles would be and what content would be in each article. --Leopardtail (talk) 17:28, 21 June 2014 (UTC)