What is the difference between the effective refractory period and the relative refractory period?
What is the difference between the effective refractory period and the relative refractory period?
The main difference between absolute and relative refractory period is that absolute refractory period is the period of time during which a second action potential absolutely cannot be initiated whereas relative refractory period is the interval immediately after the absolute refractory period.
What is relative refractory period of heart?
After an action potential initiates, the cardiac cell is unable to initiate another action potential for some duration of time (which is slightly shorter than the “true” action potential duration). This period of time is referred to as the refractory period, which is 250ms in duration and helps to protect the heart.
What is relative refractory period in ECG?
QT Interval – Beginning of QRS Complex to end of T wave – Absolute Refractory Period is the beginning of QRS to PEAK of T wave. The last half of T-wave is known as relative refractory period.
What is atrial effective refractory period?
The effective refractory period (ERP) is the amount of time in which the cell cannot respond to a new conducted stimulus. This period is how the heart stays in rhythm and prevents arrhythmias. It is made up of Phases 0, 1, 2, and 3.
What are the 3 refractory periods?
The total refractory period is comprised of the (1) absolute refractory period (ARP) or effective refractory period (ERP), which is the period during which an electrical stimulus will not elicit an AP because the membrane is not sufficiently repolarized and sodium channels have not completely recovered; (2) relative …
When does relative refractory period occur?
The relative refractory period is the interval of time during which a second action potential can be initiated, but initiation will require a greater stimulus than before.
What affects relative refractory period?
The relative refractory period is the interval of time during which a second action potential can be initiated, but initiation will require a greater stimulus than before. Refractory periods are caused by the inactivation gate of the Na+ channel.
When is the relative refractory period?
