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2. Sinus bradycardia - Wikipedia

   en.wikipedia.org/wiki/Sinus_bradycardia

   Sinus bradycardia is a sinus rhythm with a reduced rate of electrical discharge from the sinoatrial node, resulting in a bradycardia, a heart rate that is lower than the normal range (60–100 beats per minute for adult humans). [1] [2]

3. Sinus tachycardia - Wikipedia

   en.wikipedia.org/wiki/Sinus_tachycardia

   Sinus tachycardia is a sinus rhythm of the heart, with an increased rate of electrical discharge from the sinoatrial node, resulting in a tachycardia, a heart rate that is higher than the upper limit of normal (90-100 beats per minute for adult humans). [1] The normal resting heart rate is 60–90 bpm in an average adult. [2]

4. Heart rate - Wikipedia

   en.wikipedia.org/wiki/Heart_rate

   A medical monitoring device displaying a normal human heart rate. Heart rate is the frequency of the heartbeat measured by the number of contractions of the heart per minute (beats per minute, or bpm). The heart rate varies according to the body's physical needs, including the need to absorb oxygen and excrete carbon dioxide.

5. Inappropriate sinus tachycardia - Wikipedia

   en.wikipedia.org/wiki/Inappropriate_sinus...

   Controlling sinus rate in asymptomatic IST patients is debatable given that the treatment may be worse than the syndrome itself. In IST, no single therapy completely and effectively reduces heart rate and symptoms, which is likely due to the problem's complexity and a lack of a complete understanding of the causes. [3]

6. Sinusitis - Wikipedia

   en.wikipedia.org/wiki/Sinusitis

   Sinusitis, also known as rhinosinusitis, is an inflammation of the mucous membranes that line the sinuses resulting in symptoms that may include production of thick nasal mucus, nasal congestion, facial congestion, facial pain, facial pressure, loss of smell, or fever. [6] [7] Sinusitis is a condition that affects both children and adults.

7. Sinus node dysfunction - Wikipedia

   en.wikipedia.org/wiki/Sinus_node_dysfunction

   Often sinus node dysfunction produces no symptoms, especially early in the disease course. Signs and symptoms usually appear in more advanced disease and more than 50% of patients will present with syncope or transient near-fainting spells as well as bradycardias that are accompanied by rapid heart rhythms, referred to as tachycardia-bradycardia syndrome [4] [5] Other presenting signs or ...