A lenient have an AV node conduction block contained by his heart. What will come to pass?
B. The atria will contract, but not the ventricles
C. The ventricles will contract, but not the atria
D. Neither the atria nor the ventricles will contract
The answer is A. The heart will still continue to lash but the rate of the atria, and the ventricles will differ. this is called heart block, and pacemaker are implanted in oodles cases just for this.
A would be the answer. AV heart blocks are arrhythmias cause by disturbances in conduction through the AV node.There are essentially 4 types of heart blocks. First amount is a type of av heart block characterized by prolonged but consistent conduction of atrial impulses through to the ventricles.Then you enjoy second degree type 1 or Wenckebach. In this block the sinus impulse are delayed at the av node for increasingly long periods,until conduction is blocked completely, next the cycle repeats itself. In second degree type 2 The av node selectively blocks some beat while allowing others to pass through to the ventricles,the ekg shows more p top than qrs complexes.And finally third degree is the arrhythmia surrounded by which all atrial impulse are prevented from reaching the ventricles because of a complete block at the av node, this constitutes a form of av dissociation because the atria and ventricles function totally independent of each other.
Depends on the level of the block. In first degree AV Block, the block can turn out anyplace along the pathway between the sinoatrial node and the ventricals causing the electrical impulse at the Atrium to decrease but not the ventricals. In second scope AV Block, a partial block usually occurs between the AV node and the ventricles, the impulse will slow at the atrium and sometimes at the ventricles. In third degree, in that is a complete block usually at or below the AV node, and both the atrium and the ventricles are affected. The impulse are usually stopped at both levels, cause the atria and the ventricles to beat at different rates. When a being has third level or complete AV block, they will usually experience lightheadedness and fainting, and usually require placement of a pacemaker. If the block is congenital, the creature may not show these symptoms, but usually require a pacemaker at one point in their lives. If you want more detailed info including the differences on EKG's for respectively of the degrees of blockage, a moral website is www.cvphysiology.com/arrythmia.
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