What Is Angina More Condition_symptoms Is Angina Always Accompanied By A Sense Of Pressure On The Chest Or Heart, And Located More Mid-thorax?

Is Angina always accompanied by a sense of pressure on the chest or heart, and located more mid-thorax? - what is angina more condition_symptoms

I researched on the Internet angina pectoris and it seems that the tightness in the chest is a symptom. What pulsed for an easy, no, but continued dull ache in the heart area in the left breast, but do not feel in the middle of the chest of a place and under pressure? Could it be angina? Or something else?

Please provide a reference or a source of information because it is a medical problem, where the credibility was against the proposal, the key.