Sinus node disease

Introduction Sinus node disease syndrome is a group of clinical symptoms caused by insufficient sinus node function. It is an alternating tachycardia and bradycardia syndrome with syncope. Is due to the sinus node or its surrounding tissue of the original organic disease caused by sinus node impulse formation disorder, or a variety of arrhythmia and a variety of symptoms caused by sinus node to atrial impulse conduction disorder. The main feature is sinus bradycardia, which is called bradycardia-tachycardia syndrome when recurrent episodes of tachyarrhythmia. Symptoms appear more than 40 years old.

Cause

In the past, coronary heart disease was considered to be the most common cause of this disease. Recently, degenerative lesions of the sinoatrial node and its surrounding tissues are the most common causes of this disease (>50%), followed by coronary heart disease (<25%>, other rare causes). There are myocarditis, cardiomyopathy, myocardial amyloidosis and connective tissue diseases, etc. Idiopathic sclerosis-degeneration, rheumatic heart disease, surgical injury, high blood pressure, etc. can also be caused.

an examination

Related inspection

Dynamic electrocardiogram (Holter monitoring) ECG cardiopulmonary exercise test (CPET)

Diagnosis of this disease should be based on arrhythmia, the symptoms are only for reference, young and middle-aged people often use atropine, isoproterenol test, esophageal atrial pacing and other tests to confirm the diagnosis, but the elderly should not or do not do the above examination, and dynamic electrocardiogram Basically can achieve the purpose of diagnosis. If the slowest sinus rhythm <40/min and the longest R-R<1.6s, it can be diagnosed.

Differential diagnosis

Differential diagnosis of sinus node lesions:

The clinical manifestations of this disease vary in severity. Can be intermittent. More brains caused by slow heart rate. heart. Insufficient blood supply to the kidneys and other organs, especially the symptoms of cerebral blood supply. The light is weak. Dizziness. Dazzling. insomnia. Poor memory. Slow response or irritability. Easy to be misdiagnosed as neurosis. Older people are also easily misdiagnosed as cerebrovascular accidents or aging syndrome. In severe cases, it can cause a short black.

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