Nasal allergies can set the stage for sinus problems by causing the mucous membranes of your nose to swell and block your sinuses.

鼻敏感源通过引起你鼻子的鼻粘膜肿胀和堵塞你的鼻子，使得你有鼻炎。

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They can block air passages or sinus channels to cause a variety of grief.

它们能阻塞气道或鼻窦的通道，造成各种痛苦。

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Sinus relief composition can be applied to the inside surface without block an open passageway through each nostril.

鼻窦缓解组合物被施加到内表面，而又不会阻塞通过鼻孔的开口通道。

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Single lead VDD pacing in those with intact sinus node function (i.e. a young patient with congenital AV block) gets a class IIa indication.

FORBES: Overview of the New HRS/ACCF Pacemaker Guidelines