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→The different ECG waves
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==The different ECG waves== | ==The different ECG waves== | ||
[[File:PQRS_origin_en.png|thumb|left|300px|The origin of the different waves on the ECG]] | [[File:PQRS_origin_en.png|thumb|left|300px|The origin of the different waves on the ECG]] | ||
{{multiple image | |||
| align = right | |||
| direction = vertical | |||
| width = 300 | |||
| image1 = Epi_endo_en.png | |||
| caption1 = The QRS complex is formed by the sum of the electric avtivity of the inner (endocardial) and the outer (epicardial) cardiomyocytes | |||
| image2 = Qrs-shapes.png | |||
| caption2 = Example of the different QRS configurations | |||
}} | |||
The [[P_wave_morphology|'''P wave''']] is the result of the atrial depolarization. This depolarization starts in the SA (sinoatrial) node. The signal produced by pacemaker cells in the SA node is conducted to the right and left atria. Normal atrial repolarization is not visible on the ECG (but can be visible during [[atrial infarction]] and [[pericarditis]]). | The [[P_wave_morphology|'''P wave''']] is the result of the atrial depolarization. This depolarization starts in the SA (sinoatrial) node. The signal produced by pacemaker cells in the SA node is conducted to the right and left atria. Normal atrial repolarization is not visible on the ECG (but can be visible during [[atrial infarction]] and [[pericarditis]]). | ||