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Coronary heart disease is an incredibly common disease.  

It involves the coronary arteries: the arteries which provide oxygenated blood to the heart tissue itself to keep it functioning....

To answer this we can start by breaking down the phrase itself.

So, 'myo' always means muscle. 'Cardial' means of the heart. So myocardial infarction means infarction of the heart muscle....

1. Arteries have thick, elastic, muscular walls whereas veins have thin walls with few elastic fibres. Arteries need these properties to give them the strength and elasticity needed to cope with the hi...