it may be all in your head but unless you saw a cardiologist had an chest x-ray and/or echocardiogram there is no way to know if someone has an "enlarged heart" or any other type of heart anomaly by just looking at the chest wall. these sudden deaths of heatlhy people do happen unfortunately and many never knew they had a problem. have a good physical exam. if you have a family history of cardiac problem get a clearance from a cardiologist. since you are so worried this may relieve your anxiety.
how do i know if i have an enlarged heart? . recently a teenager in my area died unexpectedly from an enlarged heart. i found that many times there are no symptoms; it scares me to think that you could die of something so unexpected not even knowing about it. my imagination is on overdrive now and every little thing i notice scares me. for instance left rib by my heart protrudes a little more than the right and i have varicose veins where my stomach is and sometimes chest pains. i don't know if it's all in my head or not. thank you.