What is myocardial action potential?

The

heart relies on a number of electric currents that are defeated that are regulated by calcium, potassium and sodium ions. Myocardial potential concerns heart cell membranes undergoing a process called depolarization, when negatively charged ions inside the cellular ride through the cell membrane and positive ions move. Some ion channels that allow the substances to pass and open and close between the cells. Once the cell is depolarized, the threshold is achieved, which usually opens channels for sodium ions, creating a positive charge inside the cell. On the other hand, the inside of the cell has a negative charge, while there is a resting potential that is caused by the external flow of potassium when the associated channels are open. Depolarization can occur in areas surrounding specific cells. Alon can be created by continuous electrical signal muscle fibers that spread over the heart. Whole fibers can be depolarized at a time and then induce the same effect onOthers that usually occur in the wave effect.

There are five phases for the action potential of myocardial. When the cell is at rest and in the depolarization state, it is often said to be on the zero phase. The sodium enters the cells until a certain voltage is reached and the calcium also begins to flow. During the first phase, the sodium current stops, which generally causes the cell re-polarization. The calcium continues in the current during the second phase, which counteracts the loss of potassium because the voltage remains continuous.

Phase three is characterized by a stop in the flow of calcium, but the potassium stream increases until the heart cell penetrates to the rest state. Sodium and potassium levels are continuously regulated. The cell remains at rest during the fourth phase until the signals are triggered from the shoe or in some cases spontaneously.

myocardial cell cells deal with the matter of milliseconds. In the meantime, refractory obese can beWhite classify as absolute, which is when sodium and calcium channels remain open. The relative refractory periods are when potassium currents are sufficient to start the residual state. Communication between cardiac cells, even with the action potential of myocardium, occurs in pulses similar to nerve pulses between neurons.

The

network of nerves and nodes passes through the heart that includes a sinoatrial node that acts as a pacemaker. Cardiac muscles can sometimes be depolarized without any signal from the general nervous system. The sinoatrial node is often the starting point for such reactions. Different proteins in the nervous system can also cause signals that affect the action potential of myocardial.