I never was a big drinker (but in college I had a few), but I will have an occasional glass of wine or a beer.  Does this affect my PVC's? Found some of the latest research at:

Alcohol May Trigger Serious Palpitations in Heart Patients

Interesting!  The article states:

In a paper scheduled to be published August 1 in the American Journal of Cardiology, the UCSF researchers report that people with atrial fibrillation had almost a four and a half times greater chance of having an episode if they were consuming alcohol than if they were not.

This is something that I will need to watch.  I will need to wear my heart monitor next time I have a glass of wine!!

And the article stated:

"One of the remaining big unknowns is why or how this happens," said senior author Gregory Marcus, MD, assistant professor of medicine at the UCSF Division of Cardiology. "In a previous publication, we suggested that there was an effect on the electrical activity of the atrium that leads to these arrhythmias but we do need additional studies to prove that."

And electricity is the key.  I will need to do more research!!

And I found this at: CNN Heath - PVC's

Your heart is made up of four chambers — two upper chambers (atria) and two lower chambers (ventricles). The rhythm of your heart is normally controlled by the sinoatrial node (SA node) — or sinus node — an area of specialized cells located in the right atrium. This natural pacemaker produces the electrical impulses that trigger the normal heartbeat. From the sinus node, electrical impulses travel across the atria to the ventricles, causing them to contract and pump blood out to your lungs and body.

Premature ventricular contractions are abnormal contractions that begin in the ventricles. These extra contractions usually beat sooner than the next expected regular heartbeat. And they often interrupt the normal order of pumping, which is atria first, then ventricles. As a result, the extra, out-of-sync beats are usually less effective in pumping blood throughout the body.

Why do extra beats occur?
The reasons aren't always clear. Certain triggers, heart diseases or changes in the body can make cells in the ventricles electrically unstable. Underlying heart disease or scarring may also cause electrical impulses to be misrouted. Premature ventricular contractions may be associated with:

• Chemical changes or imbalances in the body
• Certain medications, including common asthma medications
• Alcohol or illegal drugs
• Increased levels of adrenaline in the body that may be caused by caffeine, exercise or anxiety
• Injury to the heart muscle from coronary artery disease, congenital heart disease, high blood pressure or infections (myocarditis)