Sounds like you've had a mild heart attack. Start taking CoQ10, Cod Liver Oil and Flaxseed oil to strengthen your heart ASAP!
Abnormal variations in the ST segment (depressed, but sometimes elevated) generally (but not always) signify a death of cardiac tissue. The dead tissue prevents a normal electrical pulse wave from being transmitted from the pacemaker site (the atria). First choice is to go to a clinic, where they will treat you for a nominal sum after a means test. It is serious because it generally indicates that there is an blockage of the main artery to the heart, which may require a stent. In times gone by a by-pass was often recommended. You need a full cardio work-up. Look on the internet for the nearest Hill-Burton hospital that will accept cardiac patients. Under Federal law, all hospitals who recieve federal aid must treat a certain number of patients without cost under the "Hill-Burton Act".