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AV Conduction: Difference between revisions
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In atrioventricular block the conduction between atria and ventricles is disturbed leading to an incread [[Conduction#PQ interval|PQ interval]] or to drop out of QRS complexes: atrial activity that is not followed by ventricular activity. Three degrees of block can be distinguished. | In atrioventricular block the conduction between atria and ventricles is disturbed leading to an incread [[Conduction#PQ interval|PQ interval]] or to drop out of QRS complexes: atrial activity that is not followed by ventricular activity. Three degrees of block can be distinguished. | ||
==== | ====First degree AV block==== | ||
[[Image:Rhythm_1stAVblock.png|thumb| 1st degree AV block. Although the PQ interval is prolonged all p-waves are followed by QRS complexes: there is no dropout of beats]] | [[Image:Rhythm_1stAVblock.png|thumb| 1st degree AV block. Although the PQ interval is prolonged all p-waves are followed by QRS complexes: there is no dropout of beats]] | ||
In first degree AV block there is a prolongation of PQ duration (PQ time > 0.20 sec). Still every p-wave is being followed by a QRS complex. | In first degree AV block there is a prolongation of PQ duration (PQ time > 0.20 sec). Still every p-wave is being followed by a QRS complex. | ||