The Year in Valvular Heart Disease

American College of Cardiology/American Heart Association (1).Comment: A total of 124 pages and 1,066 references. Of the 324 recommendations, 1 (0.3%) and 242 (74.7%) are on the basis of the Level of Evidence A and C, respectively. Level of Evidence "C": Consensus opinion of experts, case studies, standard of care.European Society of Cardiology (2).Comment. A total of 32 pages and 232 references. Of the 64 recommendations, 0 and 58 (90.6%) were on the basis of the Level of Evidence A and C, respectively. Level of Evidence C: Consensus of opinion of the experts, and/or small studies, retrospective studies, registries.