Key result
Alpha 1-adrenergic blockade may reduce sudden cardiac death by suppressing ischemia-induced arrhythmogenesis.
Why the study?
Experimental evidence indicates alterations in the alpha 1-adrenergic receptor system may contribute significantly to arrhythmogenesis in the ischaemic heart, despite normal antiarrhythmic physiological effects.
Population
Experimental models including conscious dogs and isolated adult canine ventricular myocytes
Comparison
Alpha 1-adrenergic stimulation or hypoxia vs normal physiological conditions or receptor blockade
Design
Review and experimental laboratory study
Authors
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Does not change ischaemic heart disease management; warrants trials of alpha1-blockade for sudden death prevention.
Experimental evidence suggests that enhanced alpha 1-adrenergic responsivity during ischemia contributes to arrhythmogenesis, highlighting alpha 1-blockade as a potential strategy to reduce sudden cardiac death.
Kurz et al. (1991) conducted a review in Ischaemic heart disease and arrhythmias. Alpha 1-adrenergic blockade was evaluated. Experimental evidence indicates that the alpha 1-adrenergic system contributes to arrhythmogenesis in the ischaemic heart, suggesting that receptor blockade may reduce sudden cardiac death.
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