Key result
An intrathoracic impedance ratio of <0.96 at an alert event reliably indicated an increase in B-type natriuretic peptide levels compared to the standard OptiVol alert threshold of 60 Ω.
Editorial discussing the potential of a new index from intrathoracic impedance measurements for heart failure management.
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Seo et al. (2015) conducted an editorial in Heart failure. Intrathoracic impedance (ITI) ratio <0.96 vs. OptiVol fluid index threshold of 60 Ω was evaluated on Increase of B-type natriuretic peptide (BNP) level. An intrathoracic impedance ratio of <0.96 at an alert event reliably indicated an increase in B-type natriuretic peptide levels compared to the standard OptiVol alert threshold of 60 Ω.
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