Life Support & Cardiac Arrest: Understanding the State During Heart-Lung Bypass

The answer is: dead

While on a heart-lung bypass machine, a patient's heart is stopped and the blood is circulated through a machine that oxygenates it and pumps it back into the body. This means that the person is technically dead during this time, as their heart is not beating and they are not breathing on their own. However, once the bypass machine is turned off and the heart is restarted, the person is considered alive again.