百度试题 结果1 题目The pacemaker of the heart is the___(two words) 相关知识点: 试题来源: 解析 (1)sinoatrial node;SA node 反馈 收藏
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The heart has a regulatory system, known as the intrinsic conduction system, that determines the pace of the heartbeat. Learn about the intrinsic conduction system, including the SA node, AV node, the bundle of His, bundle branches...
Thesinusnode consists of a cluster of cells that are situated in the upper part of the wall of theright atrium(the right upper chamber of the heart). The electrical impulses are generated there. The sinus node is also called the sinoatrial node or, for short, theSA node. The electrical ...
The sinoatrial node (SAN) is the normal pacemaker generating the regular, rhythmic contraction of the mammalian heart. Pacemaker activity of SAN cells is based on the diastolic depolarization, during which SAN cells depolarize spontaneously toward the action potential threshold. However, single SAN ...
2 : an electrical device for steadying or establishing the heartbeat Medical Definition pacemaker noun pace·mak·er ˈpā-ˌsmā-kər 1 : a group of cells or a body part (as the sinoatrial node of the heart) that serves to establish and maintain a rhythmic activity ...
Sick sinus syndrome (SSS) occurs from sinoatrial node dysfunction is the most common indication for permanent pacemaker implantation. The second most common indication for a permanent pacemaker is atrioventricular (AV) nodal disease such as second degree type II AV block or third degree heart block....
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2.an electronic device surgically implanted beneath the skin to provide a normal heartbeat by electrical stimulation of the heart muscle. 3.any specialized body tissue governing a rhythmic physiological activity, esp. the sinoatrial node that regulates heartbeat. ...
But this pacemaker activity is actually made by a group of cells that derive from the sinoatrial right venous sinus.Changes in electrolyte balance, or development of ectopic pacemaker activity , disrupt normal heart hypoxia, acidosis and drug toxicity.It can be considered a form of...