What is atrial depolarization quizlet?

Atrial depolarization: electrical impulse starting in the sinus node and spreading through the atria.

What is depolarization of the heart quizlet?

depolarization. occurs when sodium rushes into the cell, resulting in positive electrical charge and start of electrical charge and the start of electrical current flow. sodium-potassium pump.

Which of the following represents atrial depolarization quizlet?

The P wave represents atrial depolarization. You just studied 49 terms!

What is atrial depolarization?

Atrial depolarization initiates contraction of the atrial musculature. As the atria contract, the pressure within the atrial chambers increases, which forces more blood flow across the open atrioventricular (AV) valves, leading to a rapid flow of blood into the ventricles.

What causes depolarization quizlet?

Depolarization. sodium enters cell and the membrane becomes less negative, membrane reaches -55mv voltage, activation gates open and Na floods in. Repolarization. Na stops flowing into the cell. membrane approached -50mv, the K gates open, slow acting till reach 30mv as K flows out of the, cell begins Repolarization.

What does depolarization mean in the heart?

Depolarization of the heart is the orderly passage of electrical current sequentially through the heart muscle, changing it, cell by cell, from the resting polarized state to the depolarized state until the entire heart is depolarized.

What is atrial depolarisation?

What is atrial repolarization?

Atrial repolarization waves can simulate myocardial ischemia by causing ST segment elevation or depression depending upon the site of origin of the atrial impulse. Awareness and identification of pseudoinfarct patterns on ECGs is important to avoid unnecessary diagnostic interventions and treatment.

What does atrial repolarization mean?

Atrial repolarization waves can simulate myocardial ischemia by causing ST segment elevation or depression depending upon the site of origin of the atrial impulse.

What is atrial and ventricular depolarization?

Atrial depolarization is reflected by the P wave, and ventricular depolarization is reflected by the QRS complex, whereas the T wave reflects ventricular repolarization, see Figure 6.10. Atrial repolarization cannot usually be discerned from the ECG since it coincides with the much larger QRS complex.