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When the maxillary sinus is involved, the inferior oblique muscle may be damaged. [1] The cause of silent sinus syndrome is not well understood. Bacteria in the maxillary sinus may be involved. The connection to the nose may be blocked. [1] [2] This can create negative pressure in the sinus, as secretions are reabsorbed. [1]
Carotid sinus syncope is due to pressure on the carotid sinus in the neck. [2] The underlying mechanism involves the nervous system slowing the heart rate and dilating blood vessels, resulting in low blood pressure and thus not enough blood flow to the brain. [2] Diagnosis is based on the symptoms after ruling out other possible causes. [3]
The sinus will fill with fluid or blood unless the pressure differential is neutralized. [6] If the outlet is blocked during ascent, the situation is reversed and "reverse squeeze" appears. [7] Pressure inside the sinus increases, affecting the walls of the sinus and producing pain or epistaxis.
Frontal – may cause pain or pressure in the frontal sinus cavity (above the eyes), often experienced as headache, particularly in the forehead area. Ethmoidal – may cause pain or pressure pain between or behind the eyes, along the sides of the upper nose (medial canthi), and headaches. [27]
Inappropriate sinus tachycardia is a diagnosis of exclusion that is rarely made in an asymptomatic patient. [2] The following criteria are commonly used to define inappropriate sinus tachycardia: [10] The axis and morphology of the P wave during tachycardia similar to or identical to that experienced during sinus rhythm
Sinus tarsi syndrome is the clinical disorder of pain and tenderness in the sinus tarsi, which is a lateral tunnel in the foot at the junction of the hindfoot and the midfoot, between the ankle and the heel. [1] [2] Most of the time, sinus tarsi syndrome onsets after ankle sprains, however there can be other causes. [3]
Sinus node dysfunction (SND), also known as sick sinus syndrome (SSS), is a group of abnormal heart rhythms (arrhythmias) usually caused by a malfunction of the sinus node, the heart's primary pacemaker. [1] [2] Tachycardia-bradycardia syndrome is a variant of sick sinus syndrome in which the arrhythmia alternates between fast and slow heart ...
It can be caused by anatomical factors such as a deviated septum or nasal polyps (growths), as well as infection. Symptoms include difficulty breathing through the nose, swelling and pain around the nose and eyes, postnasal drainage down the throat, and difficulty sleeping. [10] CRS is a common condition in children and young adults. [11]