A long-sleeved, pullover-type upper body garment has a continuous slit, which runs up the side of the garment from the bottom of garment body to an arm pit, and downward along the underside of a sleeve, and terminates at a point intermediately along the length of the sleeve. The segment of the slit that is in the body of the garment is temporarily closeable using mating hook-and-loop fastener members that are attached to the body of the garment on opposite sides of the slit. The segment of the slit in the upper portion of the sleeve remains at all times “open”, thereby allowing access to the middle and/or upper end of the wearer's arm for attachment of IV tubing or other medical lines. The circumference of the lower end (e.g., forearm portion) of the sleeve is neither separable nor openable, thereby requiring that a wearer insert his/her hand through the lower portion of the sleeve. The garment can be donned or removed by a patient to whom mid-arm medical lines are attached, without necessitating detachment of the medical lines. Conversely, mid-arm medical lines can be attached to a wearer's arm without necessitating rolling up of the sleeve or removal of the garment.