Englishfor English speakers
impedance
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noun
(= electric resistance)
a material's opposition to the flow of electric current; measured in ohms
cardiograph
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noun
medical instrument that records electric currents associated with contractions of the heart
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noun
(= ballistocardiograph)
a medical instrument that measures the mechanical force of cardiac contractions and the amount of blood passing through the heart during a specified period by measuring the recoil of the body as blood is pumped from the ventricles