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
The IRS can be reached at 1-800-829-4059, between 7:00 a.m. and 7:00 p.m. local time. 6. Call the toll-free telephone number for charitable organizations and government agencies if you are an exempt agency or a retirement plan administrator needing help. This number is 1-877-829-5500.