Centro Medico Nacional 20 de Noviembre, ISSSTE 1 article published in JoVE Medicine Evaluation of Hydration Status by Bioelectrical Impedance Vector Analysis in Patients with Ischemic Heart Disease Undergoing Exercise Stress Test Pineda-Juárez Juan Antonio1, Navarrete-de la O Dulce María1, Suárez-Cuenca Juan Antonio2, Lara-Vargas Jorge Antonio3, Arteaga-Martínez José Rodolfo3, Radillo-Alba Hugo Alberto3, Leyva-Valadez Eduardo Alfonso3, Morales-Portano Julieta Danira4, Gómez-Álvarez Enrique4, Santellano-Juárez Brenda5, Mondragón-Terán Paul6 1Regenerative Medicine and Tissue Engineering Laboratory; Coordination of Research, Centro Médico Nacional “20 de Noviembre”, ISSSTE, 2Experimental Metabolism and Clinical Research Laboratory, Clinical Research Department, Centro Médico Nacional “20 de Noviembre”, ISSSTE, 3Cardiac Rehabilitation Service, Centro Médico Nacional “20 de Noviembre”, ISSSTE, 4Cardiology Service, Centro Médico Nacional “20 de Noviembre“, ISSSTE, 5Georgia Cancer Center, 6Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, CICATA-Unidad Morelos, Instituto Politécnico Nacional Hydration status imbalances can have a short-term effect on direct and indirect determinants of oxygen uptake and pulse, and morbidity and mortality prognostic factors in ischemic heart disease. This protocol describes the technique for assessment of hydration status through bioelectrical impedance vector analysis and cardiopulmonary response during exercise stress test.