What Is The Symptom Difference Between Heart Attack And Heart

What is the symptom difference between heart attack and heart burn? Husband Age 69, ate spicy lasagna today and yesterday. He also has congestive heart failure, hyliata hernia and Multiple Sclerosis (since 1966) and many other problems. The initial pains were felt on both sides of his chest and up the middle.
BP went down with a .1 clonidine as prescribed if BP top # over 160. Gave him 3 nitro pills specked as prescribed. Thanks, Wife Diana