CPT® Code 33310

An exploratory cardiotomy, also known as an exploratory atriotomy or ventriculotomy, is a surgical procedure that involves making an incision in the heart to investigate and address specific issues within its chambers. This procedure is particularly focused on the removal of any foreign bodies or thrombi (blood clots) that may be present in the atria or ventricles of the heart. The operation typically begins with a midline sternotomy, which is an incision made along the sternum to provide access to the heart. In cases where cardiopulmonary bypass is not required, the procedure is performed directly on the heart. The surgeon carefully incises the heart wall, either through the atrium or ventricle, to gain access to the interior of the heart chamber that may be compromised. Once inside, the surgeon inspects the heart chamber for any abnormalities, such as foreign objects or thrombi, and removes them as necessary. After the procedure, the incisions in the heart wall are closed, and if cardiopulmonary bypass was utilized, it is subsequently terminated. The procedure concludes with the placement of chest tubes if needed and the closure of the chest wall incision. This code, CPT® 33310, is specifically designated for exploratory cardiotomy performed without the use of cardiopulmonary bypass, while CPT® 33315 is used when bypass is involved.