Pulmonary vein deceleration injury is rare and patients can be deceptively stable for a period after injury. Quick diagnosis and transfer to the operating theatre is the only way to treat this potentially lethal injury successfully. Techniques of repair are a useful addition to the cardiovascular surgeon's repertoire.
KEYWORDSPulmonary vein -Left atrial wall -Left atrium -Deceleration injury -Cardiopulmonary bypass
Case HistoryA 24-year-old male car driver was admitted following a head-on collision with a tree at unknown speed. The front seat passenger was pronounced dead at the scene. (Neither were wearing seatbelts.) On extraction from the car, the driver had a Glasgow coma scale score of 3 so he was intubated and stabilised with a blood pressure of 125/80mmHg and a pulse rate of 90bpm. In the emergency room, a right haemothorax was diagnosed and a chest drain inserted. Two litres of blood were drained and computed tomography showed a right haemopneumothorax (Fig 1), an undisplaced left lateral clavicular fracture, left inferior pubic ramus and acetabular fractures. Owing to continued drainage from the right chest requiring massive colloid transfusion, he was taken to theatre for definitive treatment.The patient was positioned in the right thoracotomy position and via the sixth intercostal space, copious amounts of clot were evacuated. Bleeding from the inferior pulmonary vein was identified with partial avulsion of the vein from the left atrium. No other intrathoracic injuries were identified. The decision was made to repair this on cardiopulmonary bypass (CPB). With the right hilum packed with swabs, the right groin was exposed and the right common femoral artery and vein were identified. CPB was commenced via a 22Fr Thin-Flex single stage venous cannula (Edwards, Irvine, CA, US) in the right femoral vein and the return was via a 16Fr Fem-Flex II (Edwards) in the right femoral artery.A curved DeBakey clamp was applied to the left atrium; the right main pulmonary artery was snared to ensure a bloodless field and further assessment showed a complex avulsion of the right inferior pulmonary vein extending into the left atrium, which was almost completely circumferential. The tip of the tear reached just beneath the right superior pulmonary vein. In order to improve venous return and decompress the heart, a two-stage venous cannula was placed in the right atrium and connected to the femoral vein cannula via a Y-connector. The ascending aorta was crossclamped and under cardioplegic arrest, the left atrial clamp was removed to allow further assessment. It confirmed the complex nature of the pulmonary vein avulsion.The inferior vein was avulsed almost circumferentially with extension to the superior vein and also into the left atrium. The intra-atrial tear was repaired primarily and a porcine pericardial patch (Vascutek, Inchinnan, UK) was used to repair the anterior part of the avulsion on the left atrium, maintaining patency to the right inferior pulmonary vein (Fig 2). After routine deairing manoeuvres,...