As seen in the figure showing premature ventricular contractions ( PVCs ), the PPG pulse for the cardiac cycle with the PVC results in lower amplitude blood pressure and a PPG . Ventricular tachycardia and ventricular fibrillation can also be detected.
22.
A common example would be an " interpolated PVC " ( a type of premature ventricular contraction ) during normal sinus rhythm; the PVC does not cause an atrial contraction, because the retrograde impulse from the PVC does not completely penetrate the AV node.
