Before the colonoscopy you'll also be fitted with tools to monitor your vital signs during the procedure. These tools include patches for an electrocardiogram, or EKG, which are placed on your chest, arms, or legs. An EKG records the electrical activity of your heart.

Can a colonoscopy affect the heart?

Of all the screening methods for colon cancer, a colonoscopy is considered the gold standard because it not only finds, but also removes, cancerous and precancerous lesions. However, risks such as bleeding, colon perforation and heart problems, while low, may outweigh the benefits for some elderly patients.

What is the prep for a diagnostic colonoscopy?

Before a colonoscopy, you'll need to clean out (empty) your colon. Any residue in your colon may obscure the view of your colon and rectum during the exam. To empty your colon, your doctor may ask you to: Follow a special diet the day before the exam.