Immediate and short‐term results were less optimal, as exemplified by lower rates of less than or equal to mild MR immediately after clip deployment and up to 1 month after the procedure (43.2% versus 63.7%; P=0.012), as well as less improvement in HF indices (such as Kansas City Cardiomyopathy Questionnaire 12 score and serum BNP level), a higher pulmonary arterial systolic pressure, and a higher rate of 1‐month significant TR (Tables S12 and S13). This evidence concerns the gene NPPB and hydrops fetalis.