Why the study?
Does an experimental model of depression increase susceptibility to ventricular arrhythmias in rats?
Population
Rats exposed to an experimental model of depression (4 weeks of chronic mild stress to induce anhedonia)
Comparison
Intravenously infused chemical challenge vs Control rats
Design
Preclinical
Follow-up
4 weeks (duration of chronic mild stress)
Key result
Rats exposed to chronic mild stress to induce anhedonia exhibited increased basal heart rate, decreased heart rate variability, and a reduced threshold for ventricular arrhythmias.
Authors
Loading...
Animal model links anhedonia to arrhythmia vulnerability; hypothesis-generating and should not yet change practice.
Does an experimental model of depression increase susceptibility to ventricular arrhythmias in rats?
An experimental model of depression in rats is associated with a lower threshold for ventricular arrhythmias, suggesting a potential mechanism for increased cardiovascular risk in depressed patients.
Grippo et al. (2004) studied Depression and ventricular arrhythmias. Chronic mild stress (experimental depression) vs. Control rats was evaluated on Threshold for premature ventricular complexes, salvos, and ventricular tachycardia in response to aconitine. Rats exposed to chronic mild stress to induce anhedonia exhibited increased basal heart rate, decreased heart rate variability, and a reduced threshold for ventricular arrhythmias.