Heart Blockage More Condition_symptoms Can A 70% Blockage Cause A Heart Attack If Nothing Is Done?

Can a 70% blockage cause a heart attack if nothing is done? - heart blockage more condition_symptoms

I take a low dose of aspirin daily were given was to replace aortic valve and a bit of a heart attack, they said they had to do to the 70% R Block, except aspirin. Is it normal that my condition.? I'm happy about another heart attack fear, was my first being a non-ST, whatever that means.