Ventricular Arrhythmias Premature ventricular contractions (PVCs) are the most common cause of irregular heart rhythms.
[my.clevelandclinic.org]
They're the most common reason for arrhythmia, or an irregular heart rhythm.
[webmd.com]
If your heart feels out of rhythm or "flutters," especially when you have a lot of anxiety, it could be caused by premature ventricular contractions, or PVCs.
[webmd.com]