Sick sinus syndrome

AAI-Schrittmacher bei Sick-Sinus-Syndrom

Sick sinus syndrome (SSS), also known as sinus node dysfunction, is a group of heart rhythm disorders (Arrhythmia) where the sinus node — the heart's primary natural pacemaker — doesn't work properly. The sinus node is an area of specialized cells in the upper right chamber of the heart that controls the rhythm of your heart.

Symptoms[edit | edit source]

Symptoms of sick sinus syndrome may often be subtle or confusing, as they can vary from person to person. They may include:

Fatigue
Dizziness
Fainting or near fainting
Shortness of breath
Chest pains
Rapid heartbeat (Tachycardia)
Slow heartbeat (Bradycardia)

Causes[edit | edit source]

Sick sinus syndrome is usually a result of age-related wear and tear to the heart muscle, particularly the sinus node. Other causes may include:

Scar tissue from past heart surgery
Certain medications, such as calcium channel blockers or beta blockers
Underlying health conditions, such as thyroid disease

Diagnosis[edit | edit source]

Diagnosis of sick sinus syndrome may be challenging because the symptoms can be hard to pinpoint. A doctor may use several tests to diagnose the condition, including:

Treatment[edit | edit source]

Treatment for sick sinus syndrome focuses on eliminating or reducing unpleasant symptoms. This may involve:

Changing medications that may be contributing to the syndrome
Prescribing medication to regulate the heartbeat
Implanting a pacemaker

Prognosis[edit | edit source]

With appropriate treatment, individuals with sick sinus syndrome can lead a normal life. However, they may need to have regular check-ups to monitor their condition.

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Brown atrophy of the heart

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Keshan disease

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Loeffler endocarditis

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Nonbacterial thrombotic endocarditis

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