Aspirin (Ecosprin) is a blood thinner and is indicated in patients of angina. It has no role to play in a person of 70+ years whose blood pressure is quite normal at 140/80. Contrary to earlier claims, recent data suggests that aspirin not only does not reduce but actually increases the risk of haemorrhagic stroke by 69% in males (though not in females).
It is unwise to start taking potent medicines without any reason.