![]() This remodeling causes a modification of the atrial sinus node or the group of cells responsible for producing a steady pace of impulses that signal the heart muscle to contract and relax. The specific heart rhythm pattern exhibited in individuals affected by bradycardia-tachycardia syndrome can also be a result of electrophysiological and structural remodeling of the heart muscle. The reason an issue arises with the signals is due to a dysfunction of the ion channels, which play a crucial role in regulating heart rhythm. Both bradycardia and tachycardia occur as a result of a problem with the conduction or initiation of signals meant to trigger cardiac action. Bradycardia-Tachycardia Syndrome BelMarraHealthīradycardia-tachycardia syndrome is a sick sinus syndrome complication characterized by the alternation of bradycardia or an abnormally slow heartbeat and tachycardia or an abnormally fast heartbeat. Sick sinus syndrome has several potential causes and often produces numerous complications. If sick sinus syndrome cannot be managed through the use of medication, a surgical procedure is usually needed. Common symptoms indicative of sick sinus syndrome include fatigue, breathlessness, chest pain, palpitations, bradycardia, dizziness, fainting, and confusion. These abnormal heart rhythms may be too slow, too fast, interrupted by long pauses, or any combination of these rhythm issues. However, these electrical signals are irregularly paced in individuals affected by sick sinus syndrome. In healthy individuals, a steady tempo of regular electrical impulses is produced by the sinus node. The rhythm of the heart is controlled by an area of specialized cells in the right atrium of the heart called the sinus node. The heart rate alternates between unusually slow and fast rhythms, often with a long pause between heartbeats.Sick sinus syndrome or sinus node dysfunction is a defined range of problems with an individual's heart rhythm where the sinus node does not function normally. The heart rate is within regular range at rest but doesn't increase as much as it should with physical activity. Signals to the upper heart chambers are slowed or blocked, causing pauses or skipped beats. Signals from the sinus node pause, causing skipped beats. The sinus node produces a slow heartbeat. Neuromuscular diseases, such as muscular dystrophy. ![]() Medications to treat irregular heartbeats (arrhythmias).Medications to treat high blood pressure, including calcium channel blockers and beta blockers.Inflammatory diseases affecting the heart.Damage to the sinus node or scarring from heart surgery.Age-related wear and tear of heart tissues.Sick sinus syndrome is relatively uncommon, but the risk of developing it increases with age.Ĭauses of sick sinus node syndrome can include: The heartbeat can be too fast, too slow, interrupted by long pauses - or an alternating combination of these rhythm issues. ![]() In sick sinus syndrome, the electrical signals are irregularly paced. ![]() The pace changes depending on activity, emotions and other factors. Typically, the sinus node creates a steady pace of electrical impulses. ![]() From the sinus node, electrical signals travel across the atria to the ventricles, causing them to contract and pump blood to the lungs and body. This natural pacemaker produces electrical signals that trigger each heartbeat. ![]()
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