It could be a heart defect you may have been born with called a patent foramen ovale, which happens during a bowl movement the blood backs up into the heart .Go to this website to read further,and see your cardiologist,as perhaps its gotten worse,however if one is born with it most of the time its just watched and meds like a beta blocker are given tenormin.
http://www.scuba-doc.com/pfo.htm
Edited by Karel1 on November 20 2004 at 12:39pm
