Where's the postbox? praziquantel tablets "Two years ago, when a patient had a HeartMate II and had persistent heart failure, clotting in the pump wasn't on my list as something that was going on," Starling explained. "Now when I see a patient with a device that doesn't appear to be doing the job it was intended to do, I have a heightened awareness that there could be pump[-related] clotting."