TITLE:
Noninvasive Assessment of Cardiac Index with Transesophageal Echocardiography in Patients Undergoing Mitral Valve Replacement: A Comparison between Determinations at the Mitral Valve and the Ascending Aorta
AUTHORS:
Xiaoju Hu, Hongwei Shi, Jinyan Yan, Yali Ge, Haiyan Wei
KEYWORDS:
Cardiac Index; Cardiac Output; Transesophageal Echocardiography; Mitral Valve Replacement; Ascending Aorta
JOURNAL NAME:
Open Journal of Anesthesiology,
Vol.3 No.4,
June
4,
2013
ABSTRACT: Methods: Sixteen
patients with American Society of Anesthesiologists status (ASA) II-III, age ≤ 70 yr, male or female, preoperatively NYHA II-III and EF ≥ 45%, scheduled
for mitral valve replacement (MVR) were
studied. Complete intravenous general anesthesia was used for induction and
anesthesia maintenance. After anesthesia induction we put the TEE probe
into the esophagus. The cardiac index was determined at three periods following MVR: T1 30
minutes later following cessation of bypass, T2 60 minutes after cessation of
bypass, T3 90 minutes after cessation of bypass. Statistical analysis
was made with the Bland and Altman method. Results: Ninety-six measurements were compared. The cardiac index values at the
level of prosthesis mitral valve (CIMV) ranged from 1.3 to 5.5 L·min-1·m-2 (mean 2.6 ± 0.9). The Values of cardiac index at aortic
valve (CIAA) ranged from 2.7 to8.8 L·min-1·m-2 (mean 4.9 ± 1.7). Bias was -2.3 L·min-1·m-2 and limits of agreement -5.6 to 1.0 L·min-1·m-2. Conclusion: During mitral valve
replacement, doubtful correlations were observed between values of cardiac
index at the
mitral valve and the ascending aorta using TEE.