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