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The cardiac pacemaker current

Journal of Molecular and Cellular Cardiology, 2010
In mammals cardiac rate is determined by the duration of the diastolic depolarization of sinoatrial node (SAN) cells which is mainly determined by the pacemaker I(f) current. f-channels are encoded by four members of the hyperpolarization-activated cyclic nucleotide-gated gene (HCN1-4) family.
M. Baruscotti, A. Barbuti, A. Bucchi
openaire   +3 more sources

Temporary Cardiac Pacemakers

The American Journal of Nursing, 1975
cardiac monitoring equipment such as telemetry units should not be mistaken for a temporary pacemaker. The pacemaker may be completely external or partially implanted (transthoracic, epicardial, endocardial). Completely external temporary pacing, historically the first method used, delivers shocks to the heart through electrode plates taped to the ch ...
E H, Winslow, L B, Marino
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Cardiac Pacemaker Failure

Annals of Internal Medicine, 1977
Excerpt Close follow-up of implanted cardiac pacemakers allows safe complete use of battery life.
C N, Leach, M J, Sands, S, Galle
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Classification of cardiac pacemakers

The Journal of Cardiovascular Nursing, 1991
Pacemaker codes were developed to describe cardiac pacemaker function. Familiarity with these codes is essential for nurses caring for the patient with a permanent pacemaker. The article addresses the classification code of the North American Society of Pacing and Electrophysiology and the British Pacing and Electrophysiology Group and its relationship
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Cardiac Pacemaker Currents

2001
The pacemaker current If of the sinoatrial node (SAN) is a major determinant of cardiac diastolic depolarization and plays a key role in controlling heart rate and its modulation by neurotransmitters. Substantial expression of two different mRNAs (HCN4, HCN1) of the family of pacemaker channels (HCN) is found in rabbit SAN, suggesting that the native ...
D. DiFrancesco   +3 more
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Artificial Cardiac Pacemakers

New England Journal of Medicine, 1970
Complications of Pacing Despite nearly a decade of experience with temporary and permanent pacemaker systems, complications and failures are the rule rather than the exception.
Bernard D Kosowsky, Bernard Lown, B Lown
exaly   +4 more sources

A cardiac pacemaker model

Medical & Biological Engineering, 1971
A cardiac pacemaker model is described based on a close approximation of the properties of cardiac pacemaker cells. It is a minimum-parameter model which has a simple relaxation oscillator circuit as its main element. The pacemaker model is analyzed in detail in order to show that its behaviour is similar to that of cardiac pacemaker cells.
F A, Roberge, P, Bhéreur, R A, Nadeau
openaire   +2 more sources

Electrosurgery and cardiac pacemakers

Journal of the American Academy of Dermatology, 1983
There are two basic types of cardiac pacemakers: (1) Fixed-rate pacemakers stimulate the heart at a regular rate independent of the intrinsic heart rate. (2) Demand pacemakers sense the heart's spontaneous rhythm. They are more commonly used because they are noncompetitive with the heart.
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Cardiac Pacemakers

Physics in Medicine and Biology, 1964
J G, DAVIES, G E, SOWTON
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Pacemaker in Cardiac Vein

JAMA: The Journal of the American Medical Association, 1969
To the Editor:— The report by Mullen et al of two cases of cardiac tamponade from ventricular perforation by a transvenous pacemaker ( 203 :142, 1968) brought to mind a bizarre complication from this procedure which occurred last year at the Meadowbrook Hospital, East Meadow, NY. The patient was a 75-year-old man with chronic congestive heart failure
openaire   +2 more sources

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