The P wave is the first deflection of the cardiac cycle seen on an EKG. It represents the electrical activity associated with atrial depolarization. The normal P wave is a low amplitude, vertical, rounded wave, resembling a gentle hill, which is continued immediately from the QRS complex.

2020年7月26日 · The P wave is a summation wave – electrical activity that comes from successive signaling from multiple points, causing wave-like contractions. These multiple points contain pacemaker cells that generate action potentials independently of the CNS.

P waves, or Primary waves, are the first waves to arrive at a seismograph. P waves are the fastest seismic waves and can move through solid, liquid, or gas. They leave behind a trail of compressions and rarefactions on the medium they move through.

In cardiology, the P wave on an electrocardiogram (ECG) represents atrial depolarization, which results in atrial contraction, or atrial systole. The P wave is a summation wave generated by the depolarization front as it transits the atria.

2022年1月29日 · The P wave is the first positive deflection on the ECG and represents atrial depolarisation. Atrial abnormalities are most easily seen in the inferior leads (II, III and aVF) and lead V1, as the P waves are most prominent in these leads. The Atrial Waveform – …

The P wave reflects the initiation of the electrical impulses within the sinoatrial (SA) node, the natural pacemaker of the heart. It represents the orderly propagation of the electrical signal through the atria, leading to their contraction.

ECG interpretation requires knowledge of these waves and intervals. ECG interpretation traditionally starts with an assessment of the P-wave. The P-wave reflects atrial depolarization (activation). The PR interval is the distance between the onset of …

2021年2月15日 · The P wave on an ECG trace is indicative of atrial depolarisation, which may be initiated by the sinoatrial node or by an ectopic atrial focus. The P wave is directed inferiorly and therefore should be positive in leads I and II. It is often biphasic in lead V1.

The P-wave is a small, positive and smooth wave. It is small because the atria make a relatively small muscle mass. If the rhythm is sinus rhythm (i.e under normal circumstances) the P-wave vector is directed downwards and to the left in the frontal plane and this yields a positive P-wave in lead II (Figure 2, right hand side).

The P wave occurs when the sinus node, also known as the sinoatrial node, creates an action potential that depolarizes the atria. The P wave should be upright in lead II if the action...