Additionally, although our data do not support an independent association between 25(OH)D deficiency and a biomarker of left ventricular dysfunction, namely NT-proBNP, in the setting of AMI, the high prevalence of 25(OH)D deficiency, which has been associated with incident MI [4] in prior observational studies, is an important area of future investigation. Here, NPPB is linked to myocardial infarction.