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
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
Dr.S.Venkatesan MD 