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Sinus arrhythmia

sinus arrhythmia n.
Irregularity of the heartbeat due to a variation in the sinus rhythm.


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    sinus block n. See sinoatrial block.

  • Sinus-iridum

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  • Sinusitis

    noun, Pathology. 1. inflammation of a sinus or the sinuses. noun 1. inflammation of the membrane lining a sinus, esp a nasal sinus sinusitis si·nus·i·tis (sī’nə-sī’tĭs) n. Inflammation of the mucous membrane of a sinus, especially of the paranasal sinuses.

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