Are pac's and pvc's of the heart dangerous?

PAC's and PVC's: These are not usually dangerous if your heart is normal. They can be treated if you feel the abnormal beats. If they disappear when you exercise then usually they are benign.

PVC's and PAC's: Premature atrial and ventricular contractions or extra heartbeats may be considered normal in a heathly young adult. These extra heartbeats may be aggravated by pain, anxiety, stimulant drugs, medications and foods like caffeine. Although generally benign, pac's and pvc's may reflect underlying heart disease, anemia, electrolyte or endocrine conditions. Urgent eval if chest pain, sob or syncope.

Typically no: In most patients multiple isolated PVC or pac are benign as long as it is the only cardiac finding/symptom.