TY - CHAP M1 - Book, Section TI - Pacemaker Assessment A1 - Kwan, Elizabeth A2 - Reichman, Eric F. PY - 2018 T2 - Reichman's Emergency Medicine Procedures, 3e AB - Cardiac rhythm management devices (CRMDs) are becoming increasingly common as our population ages and indications for their use broaden.1 These devices are becoming increasingly complex. Single-chamber devices with only a pacing function have given way to dual-chamber devices with the ability to sense and programmable features (e.g., automatic mode switching or rate responsiveness). Implantable cardioverter-defibrillators (ICD) have been developed as primary and secondary prevention for sudden cardiac death and have a backup pacemaker function. Biventricular pacemakers are known as cardiac resynchronization therapy (CRT). They were developed to coordinate the action of the right and left ventricles for patients with reduced systolic function and delayed conduction defined by a wide QRS. Most CRT devices have an associated defibrillator (CRT-D) since indications for CRT are associated with a high risk for ventricular tachycardia (VT) and ventricular fibrillation (VF). SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1159796668 ER -