منابع مشابه
Structure and function of cardiac pacemaker channels.
Cardiac pacemaking is controlled by a mixed Na(+)/K(+) current named I(f), which is activated by hyperpolarized membrane potentials. Recently, a family of hyperpolarization-activated cyclic nucleotide-gated cation (HCN) channels has been cloned. The members of this family exhibit the general features of I(f) channels. This review describes the molecular diversity of the HCN channel family and t...
متن کاملErosive Pressure Dermatitis Associated with Cardiac Pacemaker
Erosive dermatitis is a skin reaction associated with implantable cardiac devices (ie, pacemakers and cardioverter defibrillators). We report a 65-year-old man with a history of several cerebrovascular attacks who developed an erythematous crusted erosive patch over the pacemaker site after implantation of two subsequent pacemakers. We suggest that physical irritation may be a trigger factor fo...
متن کاملCaMKII-dependent phosphorylation regulates basal cardiac pacemaker function via modulation of local Ca2+ releases.
Spontaneous beating of the heart pacemaker, the sinoatrial node, is generated by sinoatrial node cells (SANC) due to gradual change of the membrane potential called diastolic depolarization (DD). Spontaneous, submembrane local Ca(2+) releases (LCR) from ryanodine receptors (RyR) occur during late DD and activate an inward Na(+)/Ca(2+)exchange current to boost the DD rate and fire an action pote...
متن کاملEffect of electronic apex locators on cardiac pacemaker function.
The purpose of this study was to assess the effects of five electronic apex locators on pacemaker function in vitro. A Biotronik Actros DR+ pacemaker was evaluated at maximum sensitivity on a flat bench top. The pacemaker lead, electronic apex locator, and oscilloscope were connected across a 150-ohm resistor. Pace monitoring was carried out with a Biotronik EPR 1000 programmer and a Tektronix ...
متن کاملAn intragastric cardiac pacemaker.
A 62-year-old housewife was seen in May 1967 with attacks of dizziness and loss of consciousness. A diagnosis of complete heart block with Stokes-Adams syncope was made. Anterolateral thoracotomy was performed and myocardial electrodes were inserted over the left ventricle and were connected to a Devices fixed-rate pacemaker, inserted in the rectus sheath posterior to the rectus muscle. Postope...
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ژورنال
عنوان ژورنال: Archives of Cardiovascular Diseases Supplements
سال: 2020
ISSN: 1878-6480
DOI: 10.1016/j.acvdsp.2020.03.136