Preexcitation syndrome is a condition in which the electrical impulses that travel through the heart are conducted through an abnormal pathway. This results in an earlier than normal activation of the ventricles, or lower chambers, of the heart.
- Preexcitation syndrome is a condition where there is a delay in the ventricular contraction and, therefore, atrioventricular (AV) conduction. This leads to an abnormal heart rhythm called preexcitation.
- The causes of preexcitation syndrome are unknown, but it is more common in children than adults.
- The main cause of preexcitation syndrome is Wolff-Parkinson-White syndrome (WPW), which is a form of congenital heart disease.
- In WPW, an extra electrical pathway called an accessory pathway exists between the atria and ventricles.
- The accessory pathway is responsible for causing the early activation of ventricular contraction and abnormal conduction through this pathway.
There are a number of causes of preexcitation syndrome. Some of the most common include:
1. Heart diseases—such as cardiomyopathy or heart valve problems
2. Fainting spells or syncope
3. Certain medications like stimulants, painkillers and others
4. Electrolyte imbalances—such as low potassium levels, high calcium levels and high sodium levels
-Use of stimulant drugs such as amphetamines or cocaine
-Stress and anxiety disorders like panic attacks or posttraumatic stress disorder (PTSD)
-Cardiac arrhythmias like atrial fibrillation or atrial flutter
Fast heartbeat,Irregular or skipped heartbeats (also called extrasystoles),Shortness of breath, especially when exercising or at rest,Chest pain (angina) when exercising or at rest,Heart palpitations (irregular heartbeat that can feel like fluttering, pounding, or racing),Lightheadedness and fainting
Beta blockers such as metoprolol (Lopressor, Toprol-XL),Propranolol (Inderal, Innopran XL),Atenolol (Tenormin)Aspirin,Ibuprofen