Key result
ECT induces a triphasic autonomic response marked by sympathetic then parasympathetic activation post-stimulus.
Why the study?
The specific timing of sympathetic and parasympathetic autonomic nervous activity changes during and after seizures induced by electroconvulsive therapy was unclear.
Does electroconvulsive therapy induce specific dynamic changes in cardiac autonomic nervous system activity in patients with depression?
Comparison
Heart rate and HRV indices before and after ECT stimulus onset
Design
Observational sequential HRV analysis study
Follow-up
4 minutes after stimulus onset
Authors
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Requires vigilant cardiac monitoring during ECT; leaves open arrhythmic risk prediction in comorbid patients.
Observational (n=17)
Does electroconvulsive therapy induce specific dynamic changes in cardiac autonomic nervous system activity in patients with depression?
Electroconvulsive therapy induces a triphasic change in cardiac autonomic activity, characterized by initial parasympathetic dominance, followed by sympathetic activation, and a return to parasympathetic activation.
Suzuki et al. (2015) conducted an observational in Depression (n=17). Electroconvulsive therapy vs. Prestimulus baseline was evaluated on Heart rate and heart rate variability (HF and LF/HF components). Electroconvulsive therapy induced a triphasic cardiac autonomic response, with sympathetic activation at 30 to 80 seconds and parasympathetic activation at 80 to 130 seconds post-stimulus.
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