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.
Related Topics
Privacy Policy, Terms and Conditions, DMCA Policy and Compliant
Copyright © 2018-2024 BrainKart.com; All Rights Reserved. Developed by Therithal info, Chennai.