NPPB and hydrops fetalis: Overall, half of the participants recruited were women, nearly 50% with a BMI ≥ 30 (mean of 36) and greater than 90% with preserved EF (mean EF of 61%), a triad of findings where an accurate assessment of LV filling pressures by conventional testing such as BNP [17] and echocardiography [4, 18] have marginal accuracy and vary significantly across those with symptoms of HF.