Enhancement of an electrocardiogram (ECG) showing a normal heart rate. Shown here are 2 strokes at a regular interval,indicating a normal heart beat. An ECG measures the electrical activity of the heart. Contractions are caused by electrical signals between the upper (atrial) and lower (ventricle) chambers. The tall peak indicates the pumping action of the ventricles | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Science Source |
Taille de l’image : | 3427 px × 2082 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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