Heart Maintenace Question Title * 1. During heart surgery, a surgeon replaces a person's aortic valve with a valve made from cow tissue. Does this operation constitute maintenance or alteration? Maintenance Alteration Question Title * 2. If you'd like to explain your answer or (more importantly) send a "get well soon" message to Marshall, you may submit it here and ARSA's team will make sure it gets to him (be sure to include your name). Submit
