 [ Symptoms ] should i g to er for bloody bowel movements started with diarrhea vomiting tingling hot and sweaty and then i passed out had diarrhea for next 3 hours and then it turned to nothing but blood when i need to have a bowel movement ever 20 min or so  i have been having these blood bowel movements for almost 24 hours still have extreme pain in center of my lower abdomen do i need to go ahead and go to the er [ Disease ] a pacemaker is a device that sends small electrical impulses to the heart muscle to maintain a suitable heart rate pacemakers primarily prevent the heart from beating too slowly the pacemaker has a pulse generator which houses the battery and a tiny computer and leads wires that send impulses from the pulse generator to the heart muscle newer pacemakers have many sophisticated features that are designed to help manage arrhythmias and optimize heart rate related function as much as possible