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Propranolol
See also Beta-adrenoceptor antagonists
General information
Propranolol is a lipophilic, non-selective, pure antagonist at beta-adrenoceptors, with membrane-stabilizing action.
Organs and systems
Cardiovascular
An unusual dysrhythmia has been attributed to propranolol: alternating sinus rhythm with intermittent sinoatrial block. The authors suggested that this was accounted for by the existence of sinoatrial conduction via two pathways, the first with 2:1 block and the second with a slightly longer conduction time and intermittent 2:1 block [ ].
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