1. Introduction to ICDs

1. Introduction to ICDs

In this course, we will introduce you to implantable cardioverter defibrillators (ICDs). Implantable defibrillators have been used in patients for >30 years. The majority of ICDs use transvenous leads inserted predominantly into the right ventricile for both pacing (distal tip) and for defibrillation (intracavitary coil or coils). Most clinical trials supporting the use of ICD […]

5. Discrimination

5. Discrimination

The Microport defibrillator algorithm continually evaluates the criteria explained in the following paragraphs as soon as a ventricular cycle is detected in the Tachy/VF zone. Depending on the combination of criteria defined by the physician, some of these criteria will be taken into account in order to establish a classification (diagnosis) that will need to […]

4. Therapies

4. Therapies

In this chapter pertaining to therapies, we no longer describe the counting of events which has been detailed in the corresponding chapter. Similarly, discrimination will not be discussed. The tracings herein will be presented logically beginning with ventricular fibrillation, followed by tachycardias observed in the VT zone. We will describe the sequence of therapies that […]

3. Counters

3. Counters

Counting is the most important phase of the diagnosis, even before application of the discrimination rules. Likewise, in the event of failure of a given therapy, the counting rules during the redetection phase, in addition to influencing the progression of the therapies already performed, also influence the therapies that will follow. These cases will allow […]

7. Physiological Pacing

7. Physiological Pacing

Cardiac pacing is the only effective therapy for patients with symptomatic bradyarrhythmia. Traditional right ventricular apical pacing causes electrical and mechanical dyssynchrony resulting in left ventricular dysfunction, recurrent heart failure, and atrial arrhythmias. Physiological pacing activates the normal cardiac conduction, thereby providing synchronized contraction of ventricles. Though His bundle pacing (HBP) acts as an ideal […]

5. Conduction disorders

5. Conduction disorders

Conduction disorders may be associated with bradycardia such is the case in atrioventricular conduction disease (chapter 1). Sinus node disease also commonly causes bradycardia but the cause is decreased automaticity (chapter 2). Conduction disease of the bundle branches doesn’t not normally alter the cardiac frequency except in rare cases (chapter 3).