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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 ...
Sinus bradycardia is commonly seen in normal healthy persons and athletes in the absence of pathophysiological diseases or conditions. [1] Different factors or etiologies could lead to the dysfunction of the sinus node, causing a malformation or prolongation of the impulse. In terms of pathophysiological diseases, sinus rhythm may be caused by:
A syndrome of intrinsic disease of the sinus node, referred to as sick sinus syndrome or sinus node dysfunction, covers conditions that include symptomatic sinus bradycardia or persistent chronotropic incompetence, sinoatrial block, sinus arrest, and tachycardia-bradycardia syndrome. [2]
Tbx18 gene therapy is aimed at treating a group of arrhythmias known as sick sinus syndrome. In a healthy heart, sinoatrial (SA) nodal cells act as the heart’s pacemaker and cause the heart to beat in a regular rhythm. Approximately 10 thousand of the 10 billion cells in the heart are SA nodal cells. [2]
Sinus node dysfunction also known as sick sinus syndrome is a group of irregular heartbeat conditions caused by faulty electrical signals of the heart. When the heart's sinoatrial node is defective, the heart's rhythms become abnormal—typically too slow or exhibiting pauses in its function or a combination, and very rarely faster than normal.
The Tom Brady diet, known as TB12, is based on the mostly plant-based eating pattern that Brady has been following for years. He doesn’t ascribe to a vegan or vegetarian diet, but follows a plan ...
Inappropriate sinus tachycardia (IST) is a diagnosis of exclusion, [16] a rare but benign type of cardiac arrhythmia that may be caused by a structural abnormality in the sinus node. It can occur in seemingly healthy individuals with no history of cardiovascular disease.
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