Sinoatrial exit block occurs when the action potential initiated by the sinoatrial node is inhibited or completely blocked before it is able to leave the SA node and reach the atrium, and thus no P ...

Since hypoxia inhibits conduction & automaticity predominantly in tissues dependent on the slow (Ca-channel) current, sinus node (SN) function should be selectively depressed. The effects of acute, ...

The sinus of your heart has nothing to do with your nose as you might guess; it’s a structure in the right atrium where blood ...

Cardiovascular late effects among endometrial cancer survivors in a cohort study. This is an ASCO Meeting Abstract from the 2017 Cancer Survivorship Symposium. This abstract does not include a full ...

Normal cardiac function depends on the adequate timing of excitation and contraction in the various regions of the heart and on an appropriate pacemaker rate. This complex task is implemented by the ...

Sick sinus syndrome (SSS) is a heart rhythm problem that affects your heart's natural pacemaker. You may develop symptoms of SSS like dizziness, fainting, and fatigue. Treatment may include lifestyle ...