Hi. Great question. As you may know, we cannot offer medical advice over the Internet, for your own safety of course. Although, your question does warrant a reply. Based on my research, doctors generally do not invasive procedures (such as a stent) unless there is a blockage of 70% or more. A blockage of 50% certainly warrants attention. Although, most doctors choose to treat it by other means, such as changing your diet, exercise, and medicine. Your doctor may also have other ideas to help you manage your condition. So, your question here would be a great one to pose to your cardiologist. What do you think? John. heart-failure.net community moderator.