ABSTRACT
Resumen: La ecocardiografía realizada por especialistas no radiólogos es una herramienta que contribuye al diagnóstico y monitoreo de los pacientes críticos, además de ser una herramienta económica, precisa, no invasiva y que se puede realizar a la cabecera del paciente. La medida del gasto cardiaco se refiere a la cantidad de sangre que sale de los ventrículos del corazón a la circulación mayor o menor; en el ámbito de la medicina crítica, es una medida muy importante para verificar el diagnóstico etiológico del estado de choque y además se utiliza para guiar el manejo de los pacientes. Nuestro estudio comparó la medida de gasto cardiaco medido a través del volumen sistólico en modo bidimensional versus ecuación de continuidad.
Abstract: The echocardiography performed by non-radiological specialists is a tool that contributes to the diagnosis and monitoring of critical patients, as well as being an inexpensive, accurate, non-invasive tool that can be performed at the patient's bedside. The measurement of cardiac output refers to the amount of blood sold from the ventricles of the heart to the major or minor circulation in the field of critical medicine is a very important measure to verify the diagnosis and the state of the shock syndrome and if it is used to guide the management of patients, our study compared the measurement of cardiac output through systolic volume in two-dimensional mode versus the continuity equation.
Resumo: O ecocardiograma realizado por não radiologistas é uma ferramenta que contribui para o diagnóstico e acompanhamento de pacientes críticos, além de ser uma ferramenta não invasiva, de baixo custo e que pode ser realizada à beira do leito. A medida do débito cardíaco refere-se à quantidade de sangue que sai dos ventrículos cardíacos até a maior ou menor circulação. No campo da medicina crítica é uma medida muito importante para verificar o diagnóstico etiológico do estado de choque e também é utilizada para orientar o manejo dos pacientes. Nosso estudo comparou a medida do débito cardíaco medida através do volume sistólico no modo bidimensional versus a equação de continuidade.
ABSTRACT
OBJECTIVE: To prospectively assess the relationship between the two different measurement methods for the evaluation of left atrial (LA) volume using cardiac multidetector computed tomography (MDCT) and to compare the results between cardiac MDCT and echocardiography. MATERIALS AND METHODS: Thirty-five patients (20 men, 15 women; mean age, 60 years) underwent cardiac MDCT angiography for coronary artery disease. The LA volumes were measured using two different methods: the two dimensional (2D) length-based (LB) method measured along the three-orthogonal planes of the LA and the 3D volumetric threshold-based (VTB) method measured according to the threshold 3D segmentation of the LA. The results obtained by cardiac MDCT were compared with those obtained by echocardiography. RESULTS: The LA end-systolic and end-diastolic volumes (LAESV and LAEDV) measured by the 2D-LB method correlated well with those measured by the 3D-VTB method using cardiac MDCT (r = 0.763, r = 0.786, p = 0.001). However, there was a significant difference in the LAESVs between the two measurement methods using cardiac MDCT (p < 0.05). The LAESV measured by cardiac MDCT correlated well with measurements by echocardiography (r = 0.864, p = 0.001), however with a significant difference (p < 0.01) in their volumes. The cardiac MDCT overestimated the LAESV by 22% compared to measurements by echocardiography. CONCLUSION: A significant correlation was found between the two different measurement methods for evaluating LA volumes by cardiac MDCT. Further, cardiac MDCT correlates well with echocardiography in evaluating the LA volume. However, there are significant differences in the LAESV between the two measurement methods using cardiac MDCT and between cardiac MDCT and echocardiography.