Abstract
The accumulation of lysophosphoglycerides has been implicated as an important biochemical factor for cardiac arrhythmias. Recently, we demonstrated that lysophosphatidycholine caused cardaic arrhythmias in the isolated hamster heart. In this study, the arrhythmogenic nature of various lysophosphoglycerides with respect to acyl chain lengths and base groups were assessed. We demonstrated that all naturally occuring lysolipids tested were arrhythmogenic at 0.05–0.10 mM. Arrhythmias were also observed with Triton X-100 or sodium laurylsulfate at 0.05 –0.10 mM. Our data suggests that no correlation exists between the arrhythmogenic nature of the lysolipids and their critical micelle concentrations. We postulate that arrhythmias are produced by the detergent effect of lysophosphoglycerides.
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