Electrocardiogram. Hands holding an electrocardiogram (ECG) of a normal heart rate. An ECG measures the electrical activity of the heart. Contractions are caused by electrical signals between the upper (atrial) and lower (ventrical) chambers. The tall peak indicates the pumping action of the ventricles | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Vernon, Tim / LTH NHS Trust |
Taille de l’image : | 5197 px × 3452 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |