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Ventriculophasic sinus arrhythmia in complete heart block

Posted Dec 20 2008 7:17pm

ecg-ventriculophasic-21

Ventriculophasic sinus arrhythmia is a non-respiratory sinus arrhythmia seen in complete AV block.

The PP interval enclosing a QRS complex is shorter than a PP interval not enclosing a QRS.

The Mechanism 

ecg-ventriculophasic-sinus-arrhytmia1

The proposed mechanism is the  increased blood flow into the SA node artery  during ventricular systole  stimulating it to produce an early pacemaker activity and thus shortening the sinus cycle length.

Clinical significance : None for the patient  Academic purpose for the students

      
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