Search results
Results from the WOW.Com Content Network
Leadless pacemakers are devices that are as small as a capsule and are small enough to allow the generator to be placed within the heart, therefore avoiding the need for pacing leads. [11] As pacemaker leads can fail over time, a pacing system that avoids these components offers theoretical advantages.
HCN channels are sometimes referred to as pacemaker channels because they help to generate rhythmic activity within groups of heart and brain cells. HCN channels are activated by membrane hyperpolarization, are permeable to Na + and K + , and are constitutively open at voltages near the resting membrane potential. [ 2 ]
An artificial cardiac pacemaker (or artificial pacemaker, so as not to be confused with the natural cardiac pacemaker) or just pacemaker is an implanted medical device that generates electrical impulses delivered by electrodes to the chambers of the heart either the upper atria, or lower ventricles to cause the targeted chambers to contract and ...
Emily Hollenbeck lived with a recurring depression she likened to a black hole, where gravity felt so strong and her limbs so heavy she could barely move. Researchers say the treatment — deep ...
An small new study has found that adaptive deep brain stimulation that uses AI can reduce the time a person experiences their most bothersome Parkinson's symptom by around 50%.
For premium support please call: 800-290-4726 more ways to reach us
Deep brain stimulation (DBS) has shown benefits for movement disorders such as Parkinson's disease, tremor and dystonia and other neuropsychiatric disorders such as depression, obsessive-compulsive disorder, Tourette syndrome, chronic pain and cluster headache. DBS can directly change the brain activity in a controlled manner and is hence used ...
The cardiac pacemaker is the heart's natural rhythm generator. It employs pacemaker cells that generate electrical impulses, known as cardiac action potentials . These potentials cause the cardiac muscle to contract, and the rate of which these muscles contract determines the heart rate .