Mercury not a heart risk?

Mercury poisoning »

CTV.ca

Study: mercury in fish not a heart risk 

I sort have found the above article a little ridiculous. Because it would be like saying:Cyanide  is not a heart risk.

So, below I put in a quote from wikipedia to illustrate what I'm talking about. 

 begin quote from Wikipedia under the heading "Mercury poisoning".
Mercury poisoning (also known as hydrargyria or mercurialism) is a disease caused by exposure to mercury or its compounds. Mercury (chemical symbol Hg) is a heavy metal that occurs in several forms, all of which can produce toxic effects in high enough doses. Its zero oxidation state Hg⁰ exists as vapor or as liquid metal, its mercurous state Hg⁺ exists as inorganic salts, and its mercuric state Hg²⁺ may form either inorganic salts or organomercury compounds; the three groups vary in effects. Toxic effects include damage to the brain, kidney, and lungs.^[1] Mercury poisoning can result in several diseases, including acrodynia (pink disease), Hunter-Russell syndrome, and Minamata disease.^[2]
Symptoms typically include sensory impairment (vision, hearing, speech), disturbed sensation and a lack of coordination. The type and degree of symptoms exhibited depend upon the individual toxin, the dose, and the method and duration of exposure.