2008, Número 1
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Med Sur 2008; 15 (1)
Flujo coronario, disfunción miocárdica y sepsis
González-Chon O, García-López S, Arias-Sánchez EA, Arriaga-Gracia J
Idioma: Español
Referencias bibliográficas: 40
Paginas: 3-10
Archivo PDF: 120.75 Kb.
RESUMEN
El choque séptico se caracteriza por un gasto cardiaco y un transporte de oxígeno aumentados así como una resistencia vascular sistémica y aporte de oxígeno reducidos. Esto es debido a la pérdida de la autorregulación y al flujo capilar no homogéneo. Numerosos estudios han sugerido que el flujo sanguíneo coronario inadecuado podría ejercer un papel importante en el desarrollo de la disfunción cardiaca. La sepsis se encuentra asociada a una perfusión miocárdica globalmente disminuida que produce lesión isquémica y depresión miocárdica. El patrón hemodinámico global de los pacientes sépticos, se caracteriza por un volumen sistólico bajo a pesar de un gasto cardiaco elevado. Los estímulos infecciosos inducen la liberación de mediadores de inflamación locales y sistémicos, mismos que estimulan a los leucocitos, macrófagos y células endoteliales para liberar un número de mediadores que amplifican la respuesta inflamatoria y como consecuencia originan depresión miocárdica. La producción de óxido nítrico contribuye a la disfunción cardiovascular mediante la producción de GMPc. En la actualidad es de suma importancia el realizar estudios clínicos para entender de mejor manera la disfunción miocárdica del paciente séptico, así como para saber si la disfunción miocárdica es un proceso cardioprotector ante la sepsis y las posibles acciones terapéuticas en esta enfermedad.
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