![]() The atrial threshold measurement is not based on the analysis of the evoked atrial response but rather on the highlighting of spontaneous atria or ventricles (2 methods depending on the presence or absence of atrioventricular conduction). The atrial Auto-threshold model was also favored, the atrial threshold being measured periodically (a single daily measurement at 1:00 am) with the amplitude adjustment as a function of this measurement for the next 24 hours without cycle to cycle verification of capture efficiency. There are a number of similarities with the functioning of the automatic ventricular threshold but also certain differences. This tracing raises the issue of the programming of the automatic adjustment of the atrial pacing amplitude.Īs with the ventricular channel, it is possible to program an automatic measurement of the atrial threshold with automatic adjustment of the programming. In a second instance, the pacing threshold stabilized around 1.6 Volts for 0.4 ms allowing long-term programming at 2.8 Volts for 0.4 ms thus ensuring an acceptable safety margin and consumption. Increasing the output amplitude to 4 volts for 0.4 ms resolved the problem. The sensing remained correct (> 2 mV) and the pacing impedance normal (500 ohms). Without an identifiable cause, the pacing threshold had passed beyond this value (threshold at 3 Volts for 0.4 ms). Atrial output amplitude was programmed in this patient at 2.5 volts for a pulse duration of 0.4 ms. read more ).This tracing reveals a failure of atrial capture. If necessary, direct antiarrhythmic therapy, including antiarrhythmic. Nevertheless, ventricular tachyarrhythmias are better treated with devices that can cardiovert and defibrillate as well as pace ( implantable cardioverter-defibrillators Implantable Cardioverter-Defibrillators (ICD) The need for treatment of arrhythmias depends on the symptoms and the seriousness of the arrhythmia. Some tachyarrhythmias may be terminated by overdrive pacing with a brief period of pacing at a faster rate the pacemaker is then slowed to the desired rate. The most common cause is idiopathic fibrosis and sclerosis of the conduction. read more or high-grade atrioventricular block Atrioventricular Block Atrioventricular (AV) block is partial or complete interruption of impulse transmission from the atria to the ventricles. Indications for pacemaker placement are numerous ( see table Indications for Permanent Pacemakers ) but generally involve symptomatic bradycardia Bradyarrhythmias The normal heart beats in a regular, coordinated way because electrical impulses generated and spread by myocytes with unique electrical properties trigger a sequence of organized myocardial. ![]() read more, surgery Surgery for cardiac arrhythmias The normal heart beats in a regular, coordinated way because electrical impulses generated and spread by myocytes with unique electrical properties trigger a sequence of organized myocardial. read more ), catheter ablation Ablation for Cardiac Arrhythmia The need for treatment of arrhythmias depends on the symptoms and the seriousness of the arrhythmia. read more (ICDs), pacemakers (and a special form of pacing, cardiac resynchronization therapy Cardiac Resynchronization Therapy (CRT) The need for treatment of arrhythmias depends on the symptoms and the seriousness of the arrhythmia. read more, implantable cardioverter-defibrillators Implantable Cardioverter-Defibrillators (ICD) The need for treatment of arrhythmias depends on the symptoms and the seriousness of the arrhythmia. read more, cardioversion-defibrillation Direct Current (DC) Cardioversion-Defibrillation The need for treatment of arrhythmias depends on the symptoms and the seriousness of the arrhythmia. If necessary, direct antiarrhythmic therapy, including antiarrhythmic drugs Medications for Arrhythmias The need for treatment of arrhythmias depends on the symptoms and the seriousness of the arrhythmia. read more depends on the symptoms and the seriousness of the arrhythmia. The need for treatment of arrhythmias Overview of Arrhythmias The normal heart beats in a regular, coordinated way because electrical impulses generated and spread by myocytes with unique electrical properties trigger a sequence of organized myocardial.
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