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2.a person, an organization, etc, regarded as being the leader in a particular field of activity 3.(Anatomy) Also called:cardiac pacemakera small area of specialized tissue within the wall of the right atrium of the heart whose spontaneous electrical activity initiates and controls the beat of...
1. Anything that influences the rate and rhythm of occurrence of an activity or process. 2. In cardiology, a specialized cell or group of cells that automatically generates impulses that spread to other regions of the heart. The normal cardiac pacemaker is the sinoatrial node, a group of ...
2.speed of movement.a fast pace.paso verb to walk backwards and forwards (across).He paced up and down.ir de un lado a otro ˈpacemakernoun 1.an electronic device to make the heart beats regular or stronger.marcapasos 2.a person who sets the speed of a race.liebre ...
A transistorized, self-contained, implantable pacemaker for the long-term correction of complete heart block PubMed comprises more than 23 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include link... WM Chardack,AA Gage,W Greatbat...
7. Heart rate is affected by many factors such as pregnancy8, development9and ageing10, physical activity, long-term physical training11and disease12. Another factor is the time of day and night—the resting heart rate oscillates from day to night and is lower at night in the case of ...
BackgroundResearch on biological pacemakers for the heart has so far mainly focused on short-term gene and cell therapies. To develop a clinically relevant biological pacemaker, long-term function and incorporation of autonomic modulation are crucial. Lentiviral vectors can mediate long-term gene ...
Pacemaker action potentials were recorded in the region identified by mapping as the origin of the impulse in 11 of 11grafts. Action potentials recorded from surrounding working cells were similar to adult rat heart cells in maximum diastolic potential, over- shoot, amplitude, and duration. In ...
These other programming modalities can lead to serious problems, as DDD pacing may be necessary (consider the difficulty of AAI pacing in a patient with complete heart block). Atrial sensitivity may be programmed such that sinus P waves are detected but not retrograde P waves (which can be ...
compared with a 9.4% rate among 7,256 patients who received a conventional VVI pacemaker with a transvenous lead, a statistically significant 66% relative risk reduction,Jonathan P. Piccini, MD, said at the annual scientific sessions of the Heart Rhythm Society, held online because of COVID-19...