Medical Definition of Sinus tachycardia

1. A fast heartbeat (tachycardia) occurring because of rapid firing by the sa node, the natural pacemaker of the heart. Electrical signals initiated in the sa node are transmitted to the atria and the ventricles to stimulate heart muscle contractions heartbeats. Sinus tachycardia is usually a rapid contraction of a normal heart in response to a condition, drug, or disease as, for examples, pain, fever, excessive thyroid hormone, exertion, excitement, low blood oxygen level (hypoxia), or stimulant drugs such as caffeine, cocaine, and amphetamines. However, in some cases, it can be a sign of heart failure, heart valve disease, or other illness. (12 Dec 1998)



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Lexicographical Neighbors of Sinus Tachycardia

sinus posterior
sinus prostaticus
sinus rectus
sinus reflex
sinus renalis
sinus reuniens
sinus rhythm
sinus sagittalis inferior
sinus sagittalis superior
sinus septum
sinus sigmoideus
sinus sphenoidalis
sinus sphenoparietalis
sinus standstill
sinus tachycardia (current term)
sinus tarsi
sinus thrombosis
sinus tonsillaris
sinus transversus
sinus transversus pericardii
sinus trunci pulmonalis
sinus tympani
sinus venarum cavarum
sinus venosus
sinus venosus sclerae
sinus venosus syndrome
sinus vertebrales longitudinales

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