Study design:
This is a cross sectional validity study conducted in a tertiary care
cardiac centre over a period of 7 months in 2016 after getting approval
by institutional review board and a total of 100 patients were enrolled
in the study. The need for patient consent was waived off as the study
was purely an observational study. Based on the sensitivity of cut off
points for different n variables (variables SF, E/A, DT, S/D) reported
in an earlier publication10, minimum sample size is
estimated as follows : SF< 0.6 with 10% allowable error and
95% confidence, minimum sample size is 73, for E/A > 2
with 10% allowable error & 99% confidence n is 50, for S/D
<1.5 with 15% allowable error & 99% confidence n is 65.
Based on the above results, 100 cases were included 100 cases in the
study.
Selection of study participants :
Inclusion criteria: Consecutive patients undergoing cardiac
surgery, where intra operative TEE and the PAC were used.
Exclusion criteria : Patients were not studied if they were in
atrial fibrillation, had aortic or mitral valve lesions classified as
being greater than mild or if transesophageal echocardiography was
contraindicated