Key result
Epinephrine perfusion induced a significantly lower extent of ventricular arrhythmia in rats with a high ventricular hypertrophy index compared to those with mild or no hypertrophy.
Why the study?
Does epinephrine induce severe cardiac arrhythmia in rats with ventricular hypertrophy secondary to aortic pressure overload?
Does epinephrine induce severe cardiac arrhythmia in rats with ventricular hypertrophy secondary to aortic pressure overload?
In a rat model of aortic pressure overload, severe ventricular hypertrophy was associated with a reduced susceptibility to epinephrine-induced ventricular arrhythmias.
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Severe hypertrophy may reduce epinephrine arrhythmia risk in this model; leaves open clinical translation and human relevance.
Lessard et al. (1992) studied Ventricular hypertrophy secondary to aortic pressure overload (n=30). Epinephrine vs. Sham-operated control rats was evaluated on Ventricular arrhythmia evaluated using a modified Lown's grading system. Epinephrine perfusion induced a significantly lower extent of ventricular arrhythmia in rats with a high ventricular hypertrophy index compared to those with mild or no hypertrophy.
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