Chapter: Clinical Cases in Anesthesia : Cardiac Pacemakers and Defibrillators

What is the difference between ventricular (single-chamber) and dual-chamber pacemakers?

Single-chamber ventricular pacemakers are capable of ensuring adequate ventricular rates but are not capable of synchronizing atrial and ventricular contractions.

What is the difference between ventricular (single-chamber) and dual-chamber pacemakers?

Single-chamber ventricular pacemakers are capable of ensuring adequate ventricular rates but are not capable of synchronizing atrial and ventricular contractions. Dissociation between atrial and ventricular contractions decreases ventricular filling and reduces stroke volume. Patients with cardiovascular diseases that reduce ventricular compliance (e.g., aortic stenosis, hyper-trophic obstructive cardiomyopathy) may depend upon atrial systole for up to 50% of ventricular stroke volume. Dual-chamber pacemakers are preferable for almost all patients, except those with chronic atrial fibrillation.

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Clinical Cases in Anesthesia : Cardiac Pacemakers and Defibrillators : What is the difference between ventricular (single-chamber) and dual-chamber pacemakers? |