What is the PR interval? The PR interval is a measure of time that reflects the electrical activity of your heart. This interval can be prolonged for many reasons, some of which are benign and some of which are more serious. This blog post will discuss the different causes of a prolonged PR interval and what you need to know about them.
Understanding the PR interval: The PR interval is measured in milliseconds and begins with the onset of the P wave (which represents atrial depolarization) and ends with the beginning of the QRS complex (which indicates ventricular depolarization). A normal PR interval should range from 120-200 ms. If this measure is prolonged, then it means that there is an abnormality in conduction between your heart’s atria and ventricles.
Causes of a Prolonged PR Interval: There are several causes for a prolonged PR interval, including first degree AV block, second degree AV block, third degree AV block, cardiac bundle branch block, Wolff-Parkinson-White Syndrome (WPW), and side effects of drugs such as beta blockers.
First Degree AV Block: This is the most common cause of a prolonged PR interval, which occurs when there’s a delay in conduction between the atrial and ventricular cells. First degree AV block does not usually cause any symptoms, but can be connected to underlying structural heart disease or cardiomyopathy.
Second Degree AV Block: This type of conduction abnormality is caused by intermittent delays or pauses in electrical transmission from the atria to the ventricles, resulting in an uneven heartbeat pattern. It typically presents with lightheadedness, dizziness, fainting spells, palpitations and chest pain.
Third Degree AV Block: Also known as complete heart block, this is the most serious type of conduction abnormality. It occurs when there’s a complete break in electrical communication between the atria and ventricles. This can lead to irregular heartbeats, chest pain, fainting spells, dizziness and lightheadedness. Third-degree AV block treatment usually involves an implantable pacemaker device to ensure that the heart is kept beating regularly.
It’s important to be aware of these different types of AV blocks and what causes them so that you can receive appropriate treatment if needed. If you’re experiencing any symptoms associated with an abnormal heartbeat pattern, talk to your doctor immediately so that he or she can help diagnose the issue and determine the next steps in your care. Proper treatment can help reduce your risk of further complications associated with AV block.
Atrioventricular block is a condition that affects the electrical conduction of the heart, which can lead to different types of rhythms based on its severity. It is important to understand the symptoms and causes of AV block so that you can receive proper diagnosis and treatment when needed. With proper medical care, you can help reduce your risk of further complications associated with AV block.