Pertinent interventions and outcomes. The iceberg image in the center depicts many, but not all, of the interventions made and represents that no action in particular tipped the iceberg, and the individual influence of each variable is unknowable. IHIT, I hate infections team; MRSA, methicillin-resistant Staphylococcus aureus; EKG, electrocardiogram; OR, operating room; DSWI, deep sternal wound infection; UV, ultraviolet light; CHG, chlorhexidine gluconate.