What Is Premature Atrial Contractions Pacs

Premature atrial contractions (PACs) are an irregular heart rhythm that occurs when the atria, or the upper chambers of the heart, contract earlier than they should. This can disrupt the normal electrical signaling of the heart and cause a feeling of skipped heartbeat or palpitations.

While PACs are generally harmless and do not require treatment, they can indicate an underlying heart condition or can be a precursor to more serious arrhythmias.


PACs can be caused by a variety of factors including:

1. Stress: High levels of stress or anxiety can trigger PACs in some people.

2. Caffeine and alcohol: Consuming too much caffeine or alcohol can also cause PACs.

3. Medications: Certain medications, such as beta-blockers and decongestants can cause PACs.

4. Heart conditions: PACs can also be a result of other underlying heart conditions, such as heart valve disease or coronary artery disease.


The most common symptom of PACs is a feeling of skipped heartbeat or palpitations. Some people may also experience shortness of breath, chest pain, or dizziness.


Diagnosing PACs usually involves a physical exam, electrocardiogram (ECG), and a Holter monitor. These tests allow doctors to observe the heart’s electrical activity over a period of time to determine if there are any irregularities.


In most cases, PACs do not require treatment. However, if they are interfering with a person’s quality of life or are a precursor to other arrhythmias, treatment may be necessary. Treatment options may include medications such as beta-blockers or calcium channel blockers, or radiofrequency ablation to destroy the tissue causing the irregular heartbeat.


Preventing PACs involves making lifestyle changes such as reducing stress, avoiding caffeine and alcohol, and quitting smoking. It is also important to manage any underlying heart conditions that may be contributing to the irregular heartbeat.


Premature atrial contractions (PACs) are a common and usually harmless irregular heart rhythm, but they can indicate an underlying heart condition. If you are experiencing symptoms of PACs, it is important to speak with your doctor to determine the cause and discuss appropriate treatment options. Making lifestyle changes and managing any underlying heart conditions can also help prevent PACs from occurring.