![]() Once again, the patient’s native rhythm is seen on the ECG. Pacer spikes are seen on an ECG, but there is no cardiac response. Failure to capture occurs when a pacemaker pulse is given, but the impulse is unable to depolarize non-refractory myocardial tissue.The ECG shows neither pacer spikes or pacer-induced QRS complexes, but rather the native rhythm of the patient. Failure to pace suggests that the pulse generator is not providing sufficient voltage output to depolarize myocardium.Pacemaker failure has traditionally been divided into 3 categories: These features are programmable and affect battery longevity. The stimulation threshold is the minimum amount of energy required to depolarize myocardium, described by amplitude (volts) and duration. Pacing occurs when a potential difference (voltage) is applied between two electrodes.Fracture of the leads or breakdown of the insulated coating may lead to improper pacing/sensing functionality. ![]() Lastly, biventricular (resynchronization) pacemakers place leads in the right atrium, right ventricle, and coronary sinus (which paces the left ventricle). Dual-chamber pacemakers have leads in the right atrium and right ventricle. Leads are placed in the right ventricle for single chamber pacemakers.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |