Percentage of patients with grade 2+/3+/4+tricuspid regurgitation (TR) grades postoperatively over time stratified by preoperative (pre-op) TR grades. Open diamonds and blue line indicate patients with preoperative TR grade 0; open circles and green line, those with preoperative grade 1+; open squares and purple line, those with preoperative grade 2+; closed circles and black line, those with preoperative grade 3+/4+and undergoing a tricuspid valve (TV) procedure; and open triangles and red line, those with preoperative grade 3+/4+and no TV procedure. A, TR grade 2+/3+/4+postoperatively according to preoperative TR grade and TV procedure; and (B) TR grade 2+/3+/4+postoperatively for patients with severe preoperative TR according to whether a TV procedure was performed.