What causes PVC of the heart?

As a medical professional with expertise in cardiology, I can explain that Premature Ventricular Contractions (PVCs) are extra heartbeats that disrupt the normal rhythm of the heart. They originate in the ventricles, which are the lower chambers of the heart, and can occur for a variety of reasons. Here are some common causes of PVCs: 1. Caffeine: Consumption of too much coffee, tea, or other caffeinated beverages can trigger PVCs in some individuals. 2. Alcohol: Excessive alcohol intake can lead to PVCs, particularly in susceptible individuals. 3. Stress and Anxiety: Emotional stress and anxiety can cause an increase in heart rate and trigger PVCs. 4. Smoking: Nicotine from cigarettes can stimulate the heart and lead to PVCs. 5. Excessive Exercise: Intense physical activity can sometimes cause PVCs, especially in individuals not accustomed to such levels of exertion. 6. Electrolyte Imbalances: Imbalances in electrolytes such as potassium, magnesium, or calcium can lead to PVCs. 7. Heart Conditions: Certain heart diseases, such as mitral valve prolapse, coronary artery disease, or cardiomyopathy, can cause PVCs. 8. Medications: Some medications, including certain asthma medications, antidepressants, and drugs that are used to treat high blood pressure, can cause PVCs as a side effect. 9. Illicit Drugs: The use of drugs such as cocaine or amphetamines can lead to PVCs. It's important to note that while PVCs are generally not dangerous and do not require treatment in most cases, they can be a sign of an underlying heart condition, especially if they occur frequently or are associated with other symptoms. Anyone experiencing frequent PVCs should consult with a healthcare provider to determine the cause and discuss any necessary treatment options.

Certain triggers, heart diseases or changes in the body can make cells in the ventricles electrically unstable. Heart disease or scarring may also cause electrical impulses to be misrouted. Premature ventricular contractions can be associated with: Certain medications, including decongestants and antihistamines.