Orthodontic costs vary greatly around the country. An average case fee is about $5000-$6000. Most offices will offer a variety of payment plans. An in house finance with no inâ¦terest typically will only finance the length of treatment with a 20-25% down payment. Average length of treatment is 18-24 months. Making your monthly payment $200-$300.
Under normal conditions, electrical activity is spontaneously generated by the SA node, the physiological pacemaker. This electrical impulse is propagated throughout the right atrium, and through Bachmann's bundle to the left atrium, stimulating the myocardium of the atria to contract. The conduction of the electrical impulse throughout the atria is seen on the ECG as the P wave. As the electrical activity is spreading throughout the atria, it travels via specialized pathways, known as internodal tracts, from the SA node to the AV node.
The extra electrical pathway can cause two major types of rhythm disturbances: 1  Looped electrical impulses. In WPW, the heart's electrical impulses travel down either the normal or the extra pathway and up the other one, creating a complete electrical loop of signals. 2  Disorganized electrical impulses. If electrical impulses don't begin correctly in the right atrium, they may travel across the atria in a disorganized way, causing atrial fibrillation. The disorganized signals and the extra pathway of WPW also can cause the ventricles to beat faster. As a result, the ventricles don't have time to fill with blood and don't pump enough blood to the body.