Baseline Covariates and Follow-up
Baseline (prior to surgery) demographic characteristics, comorbidities,
and laboratory data were extracted from the medical record. Medical care
throughout the hospital course was at the direction of the clinical
team, who recorded diagnoses (ICD-10 codes), laboratory tests, and
medications as part of routine care. The clinical team was not blinded
to results of the evaluation of performance during diastole. Follow-up
included the intraoperative and postoperative care phases until the time
of hospital discharge. Complications were determined from abstraction of
data routinely recorded in the medical record. Intravenous fluids and
red blood cells administered volumes were abstracted from the medical
record from time of surgery through the 4thpostoperative day.