what causes pvc in heart
If you have a known heart problem, such as heart failure or heart disease, PVCs may be a sign that a dangerous heart rhythm could occur. So if you have a heart problem, talk to your doctor if you feel any change in your heartbeat. The cause of PVCs usually isn't known. But the chance of having PVCs can be increased by: 1  Having too much or too little of certain minerals (electrolytes) in your body. 2  Having too little oxygen in your blood, which could happen if you have COPD or pneumonia. 3  Using some medicines, such as albuterol.