Stimulus Intensity in Left Ventricular Leads — SILVeR-CRT  

Congestive Heart Failure Clinical Trial

Official title: Stimulus Intensity in Left Ventricular Leads and Response to Cardiac Resynchronization Therapy

Status Completed

Clinical Trial Summary

Cardiac resynchronization therapy (CRT) is a device implanted to improve the function of some people's hearts. CRT involves the placement of 3 wires in the heart through a vein near the front of your left or right shoulder into three pumping chambers of the heart, the most important being the left lower chamber, left ventricle (LV).

Clinical Trial Description

The purpose of Cardiac resynchronization therapy (CRT) is to send small amounts of energy (called pacing) through the wires to both the left and right lower chambers of your heart at (or near) the same time. This helps the heart pump in a more coordinated way and send more blood to your body with each beat. How much energy is used for pacing is called the stimulus intensity. Increasing the pacing stimulus intensity of the left ventricular wire can lead to an increase in the volume of heart muscle directly stimulated. This has previously been shown to produce beneficial effects on the heart function, like strength of contraction and increased volume of blood pumped. The purpose of this study is to determine if pacing the wires in the left ventricular chamber of the heart using higher stimulus intensity improves the strength of the heart's contraction. ;

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Crossover Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment

Related Conditions & MeSH terms

• Congestive Heart Failure
• Heart Failure

• NCT number: NCT01060449
• Study type: Interventional
• Source: Emory University
• Status: Completed
• Phase: N/A
• Start date: August 2008
• Completion date: February 2012