Yes it causes blocka: High cholesterol especially LDL the so called bad cholesterol gets deposited over the years and causes blockage of the arteries.But high amount of HDL the good cholesterol is good for your arteries.We can not answer what percentage as it depends on many other factors like how high is the ldl, and what is the ratio of HDL and ldl, and how long the LDL is high and what is the age of the person in ques.
Answered 6/10/2014
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