<s>[INST] Hi, may I answer your health queries right now ?  Please type your query here..i got angioplasty for LAD and LEFT MAIN OSTIAL IN april 2009.in january 2010 THALIUM TEST show mild to moderate blockage in anterior wall.now since last one month i am having mild pressure in chest. [/INST] Hi Thereafter going through your query I understand your concern. I would like to tell you that Left Main Ostia is a point of major concern in itself. Generally Left main disease is to be corrected by open-heart surgery rest depends on the condition. If your thallium test was positive for moderate blockage, and now you have developed symptoms then you should personally consult with your cardiologist and get an evaluation done. You may require an angiography for a proper evaluation of the evaluation. Hopefully this will answer your query. Kind Regards </s>