sinus node


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Related to sinus node: Sinus Node Dysfunction

sinus node

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Their slow heart rate often is caused by a malfunction in one of the heart's electrical timers called the sinus node. This node, located in the upper right chamber of the heart, emits electrical pulses that keep the heart beating properly in what's known as sinus rhythm.
Rhabdomyoma-related arrhythmias are reported as premature atrial and ventricular contractions, supraventricular and ventricular tachycardia, sinus node dysfunction, atrioventricular block, and Wolff-Parkinson-White (WPW) syndrome (1, 3, 4).
The first major etiological factor (52.9%) for complete heart block came out to be other causes which include sinus node dysfunction and degenerative diseases of control system.
[5] Heart rate or pulse rate is mainly the function of sinus node autorhythmicity which is mainly the function of sympathetic and parasympathetic system.
Each contraction of your heart is controlled by an electrical signal that originates in a group of cells called the sinus node (see image).
However, sinus node dysfunction (SND) is relatively infrequent in the setting of TC (1.3% of the cases) [3].
The dogs were administrated with intravenous injection of acetylcholine (ACh) and received atrial rapid pacing treatment to establish AF model (duration ≥3 min).[5],[6] The heart rate, corrected sinus node recovery time (CSNRT), and atrial effective refractory period (AERP) were measured before and after ACh administration.
Anatomy of the human sinus node. Anat Rec 1961;141:109-39.
There is no evidence that cardiac pacing prolongs survival in patients with sinus node dysfunction [12].
Another explanation is that mechanical pressure on the sinus node by ejected blood causes acceleration in the nodal discharge.
Lithium is known to have cardiac affects including T wave flattening, sinus node dysfunction, ventricular fibrillation, and ventricular tachycardia [6, 7].