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Señalar la alternativa correcta en relación al ciclo cardiacoa. El primer tono corresponde con el cierre de las válvulas semilunares y el inicio de la relajaciónisovolumétrica de los ventrículosb. La contracción ventricular isovolumétrica coincide con el periodo de eyecciónc. El volumen telediastólico ventricular corresponde con la precargad. Las aurículas se contraen primero y luego los ventrículos gracias al retardo del impulso en el Haz de Hiss

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