Which are the reason why block of sinus room is common? 's general knowledge

Which are the reason why block of sinus room is common? 's general knowledge
Sinus the intersection of room and block mean the sinus room marries the excitement sent out and can not pass out, or spread slowly. Conduct the obstacle and happen among forming and cardiac muscle around of sinus room, can't record the excited wave which go out of the sinus room knot directly in body surface electrocardiogram, can only follow atrium except that wave (the intersection of P and wave) very much Manifestation,last room, the that the knotses is movable.
There are the following aspects to cause the factor of the block of sinus room:
( 1) Own disease of the heart: The acute myocarditis, myocardial infarction, myocardium disease, morbid state sinus room form syndrome etc..
( 2) The tension of nervus vagus increases: Last sinus that be caused room block more nervus vagus tension for temporarily or accidental sinus room block.
( 3) The influence of some medicines: Foreign digitalis is poisoned, poisoned etc. in the Kui 's.
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