Condition Description. Truncus arteriosus is an uncommon congenital heart defect where a baby is born with a single blood vessel (called a truncus) coming from the main pumping chambers of the heart (the ventricles) instead of two vessels (one from each ventricle).ondition Description. Truncus arteriosus is an uncommon congenital heart defect where a baby is born with a single blood vessel (called a truncus) coming from the main pumping chambers of the heart (the ventricles) instead of two vessels (one from each ventricle).
IRS Office Customer Service Phone Number Phone Number: 1 (800) 829-1040. Shortcut: N/A - Edit
Tax-Exempt Organizations IRS Phone Numberâ 1-800-829-4933 â For tax-exempt organizations, government organizations, as well as retirement plan administrators. This number is not to be used for for-profit organizations. Operational Hours: This number is valid from 7am to 5:30pm Central Time.