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
IRS Customer Service Phone Number: 1-800-829-1040. The IRS is a bureau of the Department of the Treasury and one of the world's most efficient tax administrators. In fiscal year 2012, the IRS collected more than $2.5 trillion in revenue and processed more than 237 million tax returns. IRS Main Office.