Sick sinus syndrome
Sick sinus syndrome, also known as sinus node dysfunction. It is original organic lesion that due to sinus node or its surrounding tissue original organic lesion, leading to the sinus node impulse barriers, or barriers from sinus node conduction to atrial, and cause arrhythmia and other symptoms. The main features is sinus heart slow action, when combined Tachyarrhythmia referred to as recurrent bradycardia - tachycardia syndrome. Often occur symptoms after the age of 40.
Cause of sick sinus syndrome have coronary heart disease, rheumatic heart disease, hypertension, heart disease and so on, may be organized by the sinoatrial node and adjacent fibrosis idiopathic degeneration the most common. To slow heart rate caused by the brain, heart, kidney insufficiency and other organs, especially the main symptoms of cerebral insufficiency, such as heart palpitations, fatigue, dizziness, syncope or near syncope and other symptoms. Tachyarrhythmia merger referred to as slow - fast syndrome. Treatment should be aimed at the causes, symptoms can be regular follow-up, sometimes significantly, such as symptoms of cerebral insufficiency syncope or near syncope are advised to placement on-demand-type artificial heart pacemaker, if necessary, coupled with the use of drugs to control tachyarrhythmias.
Sinus node is located near the right atrium at the entrance of the superior vena cava, arranged oval containing pacemaker cells and nerve fibers, can occur exciting rhythm, normal heart pacemaker. Sinoatrial node controlled by the pulsatile rhythm of the heart, known as sinus rhythm. For some reason, other than the site of the sinoatrial node (such as the atrioventricular node) the issue of emotion, but also can cause heart throb, is the ectopic pacemaker.