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 cardiac muscle requires a special electrical system for sending the correct signals, at the appropriate time, to function properly. Electrical signals that lead to contraction, originate in the wall of the right atrium, where the heart's pacemaker (sinoatrial node) is.he heart is mainly composed of cardiac muscle, hence, this muscle plays an important role in the functioning of the heart. Intercalated cells in this muscle help in the contraction of multiple cells. As mentioned, our heartbeats are an outcome of the constant contraction of the cardiac muscle.