Does stroke-work loss underestimate hemodynamic significance of aortic stenosis in patients with hypertension?
SWL underestimates the hemodynamic significance of aortic stenosis in the majority of patients with hypertension.
Formulas used for post-dilution hematocrit prediction lead to major estimation errors and a risk of inadequate transfusion practices. Estimations performed by experienced clinicians could not minimize these biases in all clinical cases as significant errors remain, with potential clinical impact. No estimation formula should be used as a hard tool for transfusing patients, but rather as a guide to predicting the probability of transfusion requirement.