Associations of peripartum biomarker levels with e' at 1 month postpartum (PP2). Associations of peripartum biomarker levels with e' at 1 month postpartum (PP2). BNP, brain natriuretic peptide; e', average of early diastolic septal and lateral mitral annular velocity; eGFR, estimated glomerular filtration rate; hs-TnI, high-sensitivity troponin I; NT-proBNP, N-terminal pro–B-type natriuretic peptide; PP1, immediately postpartum within 1 week after childbirth. Takeshi Umazume et al. Open Heart 2018;5:e000829 ©2018 by British Cardiovascular Society