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Medicina crítica (Colegio Mexicano de Medicina Crítica)
versión impresa ISSN 2448-8909
Resumen
SANTANA HERNANDEZ, Gabriela Patricia et al. Concordance of the final telediastolic volume of the left ventricle measured by ultrasonic monitor and echocardiography. Med. crít. (Col. Mex. Med. Crít.) [online]. 2019, vol.33, n.4, pp.165-169. Epub 30-Jul-2021. ISSN 2448-8909.
Background:
Sepsis has been associated with high mortality and cardiac dysfunction, echocardiography is technically difficult, depends on the operator, requires trained personnel and available equipment, so the Smith & Madigan formula (SMII) through the cardiac output monitor Ultrasonic is an adequate substitute of inotropism, being able to infer the final end-diastolic volume of the left ventricle (VDFVI) as indicator of preload.
Methods:
In 56 patients diagnosed with septic shock, the following formulas were measured by an ultrasonic cardiac output monitor and compared with final end-diastolic volume by echocardiography.
SMII = (VS × (PAM-PVC + Gp))/(7.5 × SC × TF)
VDFVI = VS × 2.7/SMII.
Results:
We compared the results measured by echocardiography and the Smith & Madigan formula, using the Bland & Altman method, we obtained an R2 = 0.92, a Linn coefficient of 0.92 with an LC95% higher 32.45, LC95% Lower - 39.45 and a 32% error rate.
Conclusion:
The Smith & Madigan formula could be useful for the calculation of final end-diastolic volume of the left ventricle. Although the percentage of error is greater than 20%, we must determine if this measure is useful for making clinical decisions.
Palabras llave : Left ventricular disfunction; sepsis; ultrasonic cardiac output monitor; Smith; Madigan; miocardiopathy septic.