RESUMO
In Figure 3, sensitivity and specificity were interchanged. The corrected Figure 3 is shown below. The author names listed in reference 14 have been corrected; the correct reference reads: Nakanishi R, Gransar H, Slomka P, Arsanjani R, Shalev A, Otaki Y, et al. Predictors of high-risk coronary artery disease in subjects with normal SPECT myocardial perfusion imaging. J Nucl Cardiol 2016;23:530-41. The units of standard deviation (SD) and bandwidth (BW) in the abstract, results and in table 3 are expressed in degrees from 0 to 360°.
RESUMO
INTRODUCTION: Left ventricular dyssynchrony (LVD) quantified by gated myocardial perfusion studies (MPS), through phase analysis (PA), has shown controversial results in myocardial stunning. OBJECTIVES: Assessment of LVD and regional wall motion abnormalities (RWMA) in normal and ischemic patients. METHODS: A cohort of 172 patients were studied. Summed Stress Score (SSS), Summed Resting Score (SRS), and Summed Difference Score (SDS) were evaluated. Group 1-patients with normal MPS (N = 133) and Group 2-patients with myocardial ischemia in the MPS (N = 39). LVD was evaluated through PA and RWM by visual analysis. RESULTS: SSS 0 vs 9.8 ± 3.9 P = .0001; SDS 0 vs 9.8 ± 3.9 P = .0001; SRS 0 vs 0 P = NS, in G1 and G2. Significant differences were found in LVD between G1 and G2, bandwidth 36 ± 14 vs 63 ± 46 P = .0001; standard deviation 16 ± 10 vs 26 ± 15 P = .0001. In G1, 16% had LVD vs RWMA in 0%, P = .0001 and in G2, 59% with LVD vs 33% with RWMA, P = .03. Sensitivity for LVD 59% and for RWMA 33%, P = .03 and specificity for LVD 83% and for RWMA 100%, P = .0001. CONCLUSION: Ischemic patients have LVD post-stress due to myocardial stunning. LVD measured by PA could be a useful tool to identify ischemia.
Assuntos
Doença da Artéria Coronariana/diagnóstico por imagem , Ventrículos do Coração/diagnóstico por imagem , Imagem de Perfusão do Miocárdio/métodos , Disfunção Ventricular Esquerda/diagnóstico por imagem , Função Ventricular Esquerda , Idoso , Feminino , Ventrículos do Coração/fisiopatologia , Humanos , Isquemia , Masculino , Pessoa de Meia-Idade , Isquemia Miocárdica/diagnóstico por imagem , Miocárdio Atordoado , Cintilografia , Estudos Retrospectivos , Sensibilidade e Especificidade , Estresse Fisiológico , Tomografia Computadorizada de Emissão de Fóton ÚnicoRESUMO
Se define la interferencia electromagnética como señales eléctricas de origen no fisiológico que pueden afectar la función del marcapaso. El objetivo del trabajo es resaltar la importancia de estas interferencias para alertar a médicos y pacientes sobre esta posibilidad y poner en manifiesto la necesidad de controlar el marcapaso si el paciente a estado expuesto a una fuente eléctrica. Se resalta la importancia del ambiente hospitalario ya que es donde se halla el mayor número de fuentes de interferencia (RMN, electrodomésticos, litotrisia, etc.).
Assuntos
Humanos , Marca-Passo ArtificialRESUMO
Se define la interferencia electromagnética como señales eléctricas de origen no fisiológico que pueden afectar la función del marcapaso. El objetivo del trabajo es resaltar la importancia de estas interferencias para alertar a médicos y pacientes sobre esta posibilidad y poner en manifiesto la necesidad de controlar el marcapaso si el paciente a estado expuesto a una fuente eléctrica. Se resalta la importancia del ambiente hospitalario ya que es donde se halla el mayor número de fuentes de interferencia (RMN, electrodomésticos, litotrisia, etc.). (AU)
