How stress strengthens group bonds – and fuels intergroup conflict
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Updates every hour. Last Updated: 14-Aug-2025 22:11 ET (15-Aug-2025 02:11 GMT/UTC)
New research explains how low levels of the electrolyte sodium in the blood can disrupt the timing of the heartbeat in patients taking widely used rhythm-control medications such as flecainide, which is commonly prescribed for atrial fibrillation and other fast or irregular heart rhythms.