Hi Squeak,
Since you already had a past medical history of ischemic heart disease and/or cardiac arrhythmias (irregular heart beats), it is really a must on your part to be under the care of Cardiologist. After thorough physical examinations and intensive laboratory investigations being conducted, you may need to take regular medications to prevent impending recurrent onset of cardiac irregularities and attacks. Undergoing balloon angioplasty (an operative procedure to dilate the narrowing of coronary arteries for blood to flow freely) or coronary artery bypass graft as a last resort can still be preventable if you are constantly under Cardiologist's treatment with regular check ups . Hope you are feeling better now.
From Jessie