What is a sinoatrial node?
sinoatrial node is part of a heart muscle where every heart rhythm or contraction comes. Sometimes known as the node, it is a pacemaker that effectively controls heart rate, although it is influenced by the input from the nervous system. The heart rhythm spreads from the sinoatrial node through the rest of the heart conductivity system to achieve all parts of the heart muscle, allowing a coordinated way of contraction. Problems with a sinoatric node can be repaired using an artificial pacemaker. Like the rest of the conductive heart system, it consists of specialized heart muscle fibers that quickly transmit electrical impulses. The conductive system is important because it ensures that different parts of the heart beat together in the right sequence.
Adult people usually show a Heart rate of about 70 rhythms per minute. Cardiac contraction occurs first in the upper chambers or in the hall, followed by a short delay by lower chambers or chambers. This delay allows time to make the atriumShe emptied into the chambers before they download and send blood all over the body.
As soon as the heart pulse was created in a sinoatrial node, it passes through the muscle of the walls of the atrial, causing the atrial to withdraw until it reaches an area called atrioventricular node. The lead in the atrioventricular node is relatively slow. This causes the necessary break before the impulses continue down through the walls of the chamber and the chamber contraction occurs.
Sometimes a disease such as a heart attack, stops impulses from atrials to the chamber and cause a condition known as a heart block. In the third degree, or complete, heart block, atrium and chamber they beat independently. The chambers of white more slowly because they now receive impulses only from the atrioventricular node. With an incomplete heart block - classified as the first or second grade - the impulses lead from atrials to the chamber. The heart of the first degree heart causes a slow heart rhythm and the second degree inDE to conditions where the atrium contracts, but the chambers do not always follow.
Treatment is generally not required for a first -degree heart block. It is not always due to illness and can be found in young people and athletes. The second -degree heart block, where the couple is sometimes treated, is sometimes treated with an artificial pacemaker. The third degree heart block is more serious with symptoms of fatigue, dizzy spells and fainting; In this case, the artificial pacemaker is usually necessary. Operations for inserting pacemaker into the heart is a minor procedure and can be performed in cardiology uniform under local anesthesia.