Haemonetics Corp. appears ready to make a bit of a retro investment, as it entered into a definitive agreement to acquire Advanced Cooling Therapy Inc. (dba Attune Medical) for $160 million at closing plus undisclosed additional contingent payments. Attune manufactures the U.S. FDA-cleared Ensoetm device, which cools the esophagus during radiofrequency cardiac ablation procedures, a treatment for atrial fibrillation whose days appeared numbered.