Ra

His Bundle Pacing Cxr

Fig. 6. Cardiac output during atrioventricular sequential pacing in normal hearts. There is a 12% increase in cardiac output during His bundle pacing compared with right ventricular apical (RVA) pacing. HRA, high right atrial pacing. See ref. 5 for further discussion.

Cardiac Output (L/min)

Fig. 6. Cardiac output during atrioventricular sequential pacing in normal hearts. There is a 12% increase in cardiac output during His bundle pacing compared with right ventricular apical (RVA) pacing. HRA, high right atrial pacing. See ref. 5 for further discussion.

Sudden cardiac death accounts for up to half of deaths in patients with congestive heart failure. Significant numbers of such patients appear to die suddenly despite noted improvements in their cardiac function under clinical management. Hence, today it is considered that combined biventricular pacing and implantable cardioverter defibrillator therapy may improve prognosis in patients with congestive heart failure (25, 26). In addition, because the use of a transvenous defibrillation lead in the coronary sinus may significantly reduce the defibrillation threshold, the combined use of left ventricular pacing and defibrillation could have enhanced clinical significance (27). Approximately 10% of implantable cardioverter defibrillator patients are indicated for biventricular pacing at the time of implantation (28).

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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