What is the simplest way to cure heart pain?

Depends. It depends on the exact reason for the pain. If it is from coronary artery disease, medications can help or some patients need surgery or an angioplasty. A cardiologist would need to evaluate the situation and decide which treatment will not only help relieve the pain but also prevent you from having a heart attack. Pain from pericarditis for instant would be treated totally differently.
Identify the cause. Once you know the cause, you can begin to relieve it. If the pain is from angina or blocked arteries, drugs such as Nitroglycerin will help. See a doctor if you have heart pain.

Related Questions

Is it true for some, stress-anxiety runs in loop repeatedly after same time frame? Causing sleep disorder and heart pain. Is there any cure?

Yes there is. Please see a psychiatrist, treatment is within reach, you need professional help, and there is cure/control, goodluck.
Anxiety, Depression. I understand your stress-anxiety, depression and concern for sleep. Trust in healing powers of your body and mind as you do not have ongoing anxiety. Anxiety can surface due to unresolved feelings in relationships or new stressors and cause sleep problem and chest pain. Use Breathing and Music Relaxation, Yoga, Meditation and Tai Chi. See a Psychiatrist for Therapy and medication.