What is the heart management system?
heart guide system spreads electrical activity through heart muscles that pump blood. A spontaneous cardiac activity of sinoatrial node (SAN) is organized, which sends impulses to other heart fibers that transfer them from the cell to the cell. All heart muscle, called cardiac myocyte, is electrically exciting and responds to San impulses. The phase of relaxation and contraction of the heart has all specific electrical profiles that are graphically represented by electrocardiogram (ECG).
The heart muscle is innervated neurons of the autonomic nervous system, especially the vagus nerve. Cardiac myocytes, as neurons, communicate together through electrical signals called action potentials. Heartbeat is a cycle in the heart guidance system that causes the heart chambers to relax and download. For each heart rhythm, electrical stimulation opens the ion channels in the cell membrane, allowing positively charged ions in the depolarizue cell, starting action potential. Another set of ionicH channels depolarize the cell with the inflow of potassium, after a short period called resting condition.
In the wall of the right atrium of the heart sinoatrial node regulates the heart rate by sending an electrical pulse to the heart myocytes. San is called a pacemaker because it regulates the heart management system through cells that shoot at stimulating intervals. Sometimes direct signals from the autonomic nervous system or hormonal overvoltages change the pace of signaling during exercise and stress. While all cardiac myocytes mediate electrical activity, cells flowing cardiac sinoatrial node actively produce synchronized, spontaneous pulses.
Impulses from San travel to atrioventricular node, a point where further leadership of the heart begins. Among the contractions there is a short delay of blood in the atrium flows into the chambers. Heart Guidance system uses conductive fibers to carry SAN signals through heartse. The right and left atriums first spread to the chambers that further depolarize. The entire sequence of depolarization for one heart rhythm takes less than a third of a second.
Electrical signals of the heart guide system are measured by electrocardiogram that portrays myocyte activity as a wool on the graph. The signals passing through the left and right atrial appear on the ECG as a wave of P, while the activity of the sinoatrial node is represented by the PR segment. The QRS ECG wave corresponds to the depolarization of the chambers, while its t wave means their depolarization. Many heart guide system disorders, called arrhythmias, create irregular wave patterns that can be observed on the ECG. For this reason, some heart disorders are named after their unusual ECG Readings.