Efthymios Deliargyris
Analyst
Sure. Thank you for the question. So the use of these reversal agents that are approved in the marketplace now, specifically Andexanet that is indicated for the reversal of the drugs we referenced before, the direct oral anticoagulant like Xarelto and Eliquis, is approved in the presence of severe life-threatening bleeding. So those drugs are used where somebody has suffered in life-threatening bleed. The usual measures are not successful in stopping the bleeding, and then they applied.
The population that we are addressing is actually much larger populations. These are patients at risk for bleeding. So if you can imagine, these are patients who are coming in with a heart attack, they have their cardio angiogram, they see that they need surgery, but because they receive these drugs are sitting -- waiting for the drug to wash out at risk for having a second heart attack, for example, but they're not bleeding.
So in that population, it's -- as of now, there are no available solutions to help them have a timely operation -- a safe and timely operation. So these patients now are waiting in the hospitals for a long time. The drugs that we're referencing would only be indicated if they were bleeding.
In addition, some case reports with these drugs were used in the setting of patients heading into surgery, especially relating to Xarelto and Eliquis, the reversal agent, Andexanet, can interfere with the necessary anticoagulation that are required when people are put on a heart-lung machine. So it poses also a complicating factor that may put the operation at risk, and therefore, are not widely used in this setting, and they're certainly not approved for that application.
The reversal agent for the bigger trend, which has a very, very small piece of the pie of the market share for these Anticoagulants, does carry an indication that can be used because it has been studied also in people heading to cardiac surgery. Having said that, there are so few patients on this drug. Again, at least in our sites, we have not experienced any of the clinical teams using these drugs in the setting. They're all opting to just wait and let the drugs wash out, which is exactly unmet need that we believe can target by allowing the surgery to proceed while at the same time removing the offending agent and reducing the bleeding risk.