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Editorial
The authors argue that T-wave amplitude remains a valid candidate index of sympathetic activity despite recent criticisms.
Although Schwartz and Weiss's (1983) paper purports to be a response to Furedy and Heslegrave (1983), it does not address the central thesis of that the paper: that the recent criticisms of the T‐wave amplitude (TWA) index of sympathetic activity were invalid. Instead, Schwartz and Weiss (1983) prefer to raise further criticisms concerning the validity of the TWA index. In this reply, we provide some clarifications and evaluations of these further points. Our conclusion remains that these further criticisms are insufficient to support abandoning TWA, and that rather the available evidence supports continuing the critical appraisal of TWA along with other candidate sympathetic indices.
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Heslegrave et al. (1983) studied this question.
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