Key result
Electrical cardiometry for measuring stroke volume variation showed good correlation with transesophageal echocardiography, with a mean bias of -1.2 (95% limits of agreement -8 to 5.7%).
Why the study?
Electrical cardiometry is a new noninvasive method to assess stroke volume variation, but its measurements required validation against transesophageal echocardiography.
Does electrical cardiometry accurately measure stroke volume variation compared to transesophageal echocardiography in patients undergoing coronary artery bypass surgery?
Observational (n=38)
Does electrical cardiometry accurately measure stroke volume variation compared to transesophageal echocardiography in patients undergoing coronary artery bypass surgery?
Mean Difference: -1.2 (95% CI -8–5.7)
Absolute Event Rate: 14.3% vs 15.5%
Electrical cardiometry provides a valid, noninvasive alternative to transesophageal echocardiography for monitoring stroke volume variation and fluid responsiveness in patients undergoing coronary artery bypass surgery.
May support noninvasive stroke volume monitoring in select settings; leaves open routine adoption pending prospective validation.
Background Cardiac output is an important determinant of tissue perfusion, with several methods described to assess it. Electrical cardiometry is a new noninvasive method for determination of stroke volume variation (SVV), which is used to calculate the cardiac output.Aim of work This study aimed to validate the electrical cardiometry measurements of SVV compared with measurements of SVV taken by transesophageal echocardiography (TEE).Methods A total of 38 patients were included in this study. Hemodynamic parameters were obtained by TEE and cardiometry soon after closure of the sternum and after volume expansion.Results SVV after 10 min of sternum closure by TEE was 15.5% (SD=7.1), and SVV after 10 min of sternum closure by cardiometry was 14.3% (SD=6.1). Bland–Altman analysis revealed a mean bias of −1.2. The 1.96 SD limits of agreement were −8 to 5.7%.Conclusion There is a good correlation between SVV measured by TEE and that measured by cardiometry. Cardiometry can be used as a noninvasive hemodynamic monitoring in patients undergoing coronary artery bypass surgery surgery.
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Said et al. (2022) conducted an observational in Coronary artery bypass surgery (n=38). Electrical cardiometry vs. Transesophageal echocardiography (TEE) was evaluated on Stroke volume variation (SVV) after 10 min of sternum closure (mean bias -1.2, 95% CI -8 to 5.7). Electrical cardiometry for measuring stroke volume variation showed good correlation with transesophageal echocardiography, with a mean bias of -1.2 (95% limits of agreement -8 to 5.7%).
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