- pacemaker current
- the small net positive current flowing into certain cardiac cells, such as those of the sinoatrial node, causing them to depolarize.
Medical dictionary. 2011.
pacemaker current
Look at other dictionaries:
Pacemaker — A system that sends electrical impulses to the heart in order to set the heart rhythm. The pacemaker can be the normal natural pacemaker of the heart or it can be an electronic device. The natural pacemaker of the heart is the sinus node, one of… … Medical dictionary
Pacemaker potential — In the heart, the pacemaker potential is the voltage created by impulses from an artificial electronic pacemaker or the SA node which drives the rhythmic firing of the heart.The pacemaker potential brings the membrane potential to the threshold… … Wikipedia
Pacemaker action potential — A pacemaker action potential is the kind of action potential that provides a reference rhythm for the network. This contrasts with pacemaker potential or current which drives rhythmic modulation of firing rate.Some pacemaker action potentials… … Wikipedia
Pacemaker, natural — The natural pacemaker of the heart is the sinus node, one of the major elements in the cardiac conduction system, the system that controls the heart rate. This stunningly designed system generates electrical impulses and conducts them throughout… … Medical dictionary
Biological pacemaker — The heart is endowed with specialized excitatory and conducting cells that are responsible for the generation and conduction of rhythmic impulses and contractions throughout the heart. If these cells are damaged by disease, the implantation of an … Wikipedia
Artificial pacemaker — Cardiac resynchronization therapy and CRT (Cardiac Resynchronization Therapy) redirect here. For the device termed a CRT D, see Implanted cardiac resynchronization device. For other uses, see Pacemaker (disambiguation). A pacemaker, scale in… … Wikipedia
Cardiac pacemaker — The contractions of the heart are controlled by chemical impulses, which fire at a rate which controls the beat of the heart.The cells that create these rhythmical impulses are called pacemaker cells, and they directly control the heart rate.… … Wikipedia
Funny current — (or funny channel, or I f ) refers to a specific current in the heart. It is called funny because it has effects opposite to those of most other heart currents.I f is a mixed Na+–K+ inward current activated by hyperpolarization and modulated by… … Wikipedia
Brain pacemaker — Brain pacemakers are used to treat people who suffer from epilepsy, Parkinson s disease, major depression and other diseases. The pacemaker is a medical device that is implanted into the brain to send electrical signals into the tissue. Depending … Wikipedia
Diaphragmatic pacemaker — A diaphragmatic pacemaker, in medicine, is a surgically implanted device used to help patients breathe following complications from spinal cord injuries. The device works through pacing of the diaphragm. Mechanism In patients with a diaphragmatic … Wikipedia
