Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Serial changes in LV pacing threshold and impedance in various subgroups. Long-term stabilities in threshold voltage and lead impedance are still maintained in various subgroups divided depending on lead position, lead polarity, and indication of lead implantation.
