Please ask your doctor how he/she thinks an increase in Metoprolol will help PVCs. (For those who are new to this, we do not have plastic pipes in our hearts, PVC in cardiology is Premature Ventricular Contractions.) About 3 weeks after a septal myectomy, I developed dizziness and giddiness, and some caregivers thought it was due to PVC. These negative symptoms were eventually diagnosed as arrythmia, and I have an ICD.