Objective To Validte the Yeliabil of left ventricle ejection fraction(LEF) measured by reconstructed impedance cardiography(RICG).
目的验证重建心阻抗图测量左室射血分数（LEF）的可靠性。
Objective To Validte the Yeliabil of left ventricle ejection fraction(LEF) measured by reconstructed impedance cardiography(RICG).
目的验证重建心阻抗图测量左室射血分数（LEF）的可靠性。
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