Atrial depolarization occurs at the P wave. The atrial contraction occurs at the peak of the wave at the influx of calcium ions to prolong depolarization.
The phase of the cardiac cycle in which the atria contract is called atrial systole. This occurs during the P wave on an ECG and helps to push blood from the atria into the ventricles.
ECG records electrical activity and not mechanical, hence it has nothing to do with contraction. But P wave represents atrial depolarization.
The period when the atria are depolarizing is known as the P wave on an electrocardiogram (ECG). This represents the electrical activity as the impulse spreads through the atria, causing them to contract and pump blood into the ventricles.
Immediately before the P wave in the cardiac cycle, the atria contract (atrial systole), pushing blood into the ventricles. This phase is called atrial depolarization. The P wave represents the depolarization of the atria on an electrocardiogram (ECG).
The P Wave on and ECG shows depolarization of the Atria, and the characteristics should be smooth, round, no more than 2.5 mm in height, no more than .11 seconds in duration, and positive in leads I,II, aVF, and V2 through V6.
Yes - On an ECG the P wave is the first wave of the cardiac cycle. It represents the Sinoatrial node which is the natural pacemaker of the heart firing and causing the atria to contract in order to fill the ventricles.
the repolarization of the atria is hidden by the QRS wave
P wave
When relaxed, the atria expand, and then the ventricles contract.
Yes, atria contracts before the ventricles.
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Polarization in an electrocardiogram (ECG) refers to the resting state of the heart's electrical activity, when no electrical impulses are being generated. This is represented by the flat line (isoelectric line) between heartbeats on the ECG tracing.