Heart pacemaker. Coloured chest X-ray showing a surgically-implanted heart pacemaker (yellow,centre right). Some of the curved ribs are also seen (green). The pacemaker supplies electrical impulses along a lead (running to far left) to the heart to keep it beating regularly. Pacemakers are fitted in patients with a malfunctioning sinoatrial node,the part of the heart which initiates each heartbeat,or a heart block impairing the nerve impulses generated by the node. Heart pacemakers may provide a regular impulse (fixed rate pacemaker) or discharge only when a heartbeat is missed (demand pacemaker) | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Fraser, Simon |
Taille de l’image : | 2196 px × 2240 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |