| 词汇 | sinus-node |
| 释义 | sinus node noun[ Cusually singular ] anatomy specializeduk /ˈsaɪ.nəs ˌnəʊd/ us /ˈsaɪ.nəs ˌnoʊd/ a group of muscle fibres in the right atrium of the heart that sends out electrical signals to control the normal beating of the heart: At rest, the sinus node typically generates electrical impulses at a rate of between 60 and 100 times per minute. This is caused by a problem with your heart's sinus node, its natural pacemaker. In people with intrinsic sinus node disease, the heart rate can be inappropriately low both at rest and during exertion. In a normal heart, contraction begins with an electrical signal from a structure called the sinus node. In a condition known as sinus node dysfunction, an abnormality of this electrical charge causes a very slow heart rate. The circulatory system & blood ABO accessory pathway adventitia adventitial ANA auricle bicuspid valve femoral artery gamma globulin glomus granulocyte haematogenous haemic phagocyte portal system precava pulmonary artery pulmonary vein pulmonic tricuspid valve Synonymsinoatrial node |
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