Definition: Sinuatrial is a term used in medical terminology that refers to the electrical activity of the heart. It is characterized by the rapid and irregular contraction of the ventricles, which are the chambers of the heart responsible for pumping blood throughout the body. In general, a sinus arrhythmia occurs when there is an abnormal electrical signal that propagates through the heart's electrical system. This can lead to various symptoms such as chest pain, shortness of breath, and fatigue. Sinus arr
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