Cardiocases casebook

Abbott ICD

P. Bordachar, M. Strik, A. Thiyagarajah, S. Ploux

1Counters

1Classification of cycles, tachycardia counters and evolution of guideline recommendations2Operating principles, specific features of the Gallant platform3Operating principles, intial detection and redetection4Competition between diffrent detection counters5Competition between the different detection counters and et spontaneous reduction6Classification of cycles and ventricular undersensing during an episode of VF7Sinus return counter and non-sustained ventricular tachycardias8Redetection counter after acceleration of VT in the VF zone9New recommandations and number cycles in initial detection10New recommendations and non-sustained tachycardia

2Therapies

1Episode of ventricular fibrillation and high defibrillation threshold2Lead dysfunction and DynamicTx™ algorithm3Activation of the VFTA algorithm to promote the delivery of an electric shock during an episode of ventricular arrhythmia4Electrical shock and induction of an AF episode5Anti-tachycardia pacing during or before charging in the VF zone6ATP during charging and acceleration of tachycardia7Sequence of therapies in the VT zone8Acceleration of VT by anti-tachycardia pacing and high defibrillation threshold

3Discrimination

1VT episode and single chamber discrimination2Episode of sinus tachycardia and single-chamber discrimination3Atrial tachycardia and single-chamber discrimination4Simple chamber discrimination and discriminant association5Single-chamber discrimination and optimization of the criterion based on morphology6Discrimination between double chamber and branch V > A7Double chamber and branch discrimination V = A8Dual chamber and V< A branch discrimination

4Oversensing

1Lead breakage on an older model2Recent device, lead malfunction, and SecureSense™ algorithm3Lead malfunction revealed by an electric shock4Oversensing of the T wave on an older model5New device, T wave oversensing, and SecureSense™ algorithm6New device, post-stimulation T wave oversensing, and SecureSense™ algorithm7Recent device, P wave oversensing, and SecureSense™ algorithm8Double counting of the R wave on an older model9New device, dual R-wave counting and SecureSense™ algorithm10Oversensing of a 50 Hz signal11Surgery and use of an electric scalpel12SecureSense™ algorithm and undersensing on the discrimination channel13SecureSense™ algorithm and loss of right ventricular capture

From Implantable Cardioverter Defibrillator — clinical cases based on tracings by P. Bordachar, M. Strik, A. Thiyagarajah, S. Ploux. Published by Cardiocases. Every numbered marker on a recording is explained in the list beneath it; tap a marker on the trace or an entry in the list.