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Sinus Pause

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A temporary pause >2 sec. without a P wave. The PP prolongation is not phasic or gradual (unlike sinus arrhythmia) and  is not a multiple of the normal PP interval (unlike sino-atrial block). When markedly prolonged or permanent, the term “sinus arrest” is used. Non-conducted premature atrial complexes should be included in the differential diagnosis.

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