Diagnosis and Management of Acute Type A Aortic Dissection

Management of acute pulmonary embolism after acute aortic dissection surgery

Acute aortic dissection (AAD) continues to be associated with high mortality and morbidity. Pulmonary embolism is also a life-threatening disease. The treatment of these life-threatening diseases remains controversial in case complications arise. Thrombolytic therapy and intensive treatment would be needed to manage these fatal diseases. A 49-year-old man with progressive back pain was admitted to our hospital. Computed tomography (CT) scan revealed type A AAD. Emergency operation for hemiarch replacement was performed. Two weeks postoperatively, the patient’s oxygenation worsened and his d-dimer levels elevated. CT scan revealed a massive thrombus in the bilateral pulmonary arteries. Intensive anticoagulation therapy was started immediately. On postoperative day 27, the patient was weaned from mechanical ventilation, but the false lumen with thrombus was recanalized again. The patient was discharged on postoperative day 75 without resulting in major complications for aortic dissection. The diagnosis of pulmonary embolism concomitant with AAD is difficult. The treatment of pulmonary embolism after AAD is controversial. Our strategy seems to be suitable for acute pulmonary embolism that occurs during the treatment of AAD.

˂Learning objective: The diagnosis of pulmonary embolism concomitant with acute aortic dissection (AAD) is difficult. The treatment of pulmonary embolism after AAD is controversial. Investigating factor XIII levels might help in the early detection of pulmonary embolism.>

Type A aortic dissection complicated by an aorto-right atrial fistula

A 63-year-old male underwent an ascending aortic replacement for an acute type A dissection. Nine days later a fistulous communication between the right coronary sinus and right atrium was identified and surgically repaired. We present a literature review, including the clinical presentation, diagnosis, and surgical management of this rare complication.

Dynamic MR angiography in acute aortic dissection

BACKGROUND

To evaluate the benefit (additional flow information), image quality, and diagnostic accuracy of a dynamic magnetic resonance angiography (MRA) combining high spatial and temporal resolution for the preinterventional assessment of acute aortic dissection.

METHODS

Nineteen patients (12 men, 7 women; aged 32-78 years) with acute aortic dissection underwent contrast-enhanced four-dimensional (4D) MRA and 3D conventional high-resolution MRA (3D MRA) within one examination on a 1.5 Tesla MR system. Both MRA datasets for each patient were evaluated and compared for image quality and visualization of vascular details on a 5-point scale (5 = excellent image quality, 1 = nondiagnostic image quality). In addition, presence and relevance of additional hemodynamic information (flow direction and organ perfusion delay) gained by dynamic MRA were assessed.

RESULTS

Conventional 3D MRA provided significantly higher values for image quality of the aorta and aortic side branches compared with dynamic MRA (aorta: 4.3 versus 3.3; P = 0.006 side branches: 4.2 versus 3.3; P = 0.02). However, in 10 of the 19 patients (53%) the additionally available information on flow dynamics due to dynamic MRA (e.g., delayed perfusion of parenchymal organs) led to a change in therapy planning and realization.

CONCLUSION

Dynamic MRA is a technique that combines functional flow and morphological information. Thus, the combination of 3D and dynamic MRA provides all requested information for treatment planning in patients suffering from acute aortic dissection.

A case study of pulmonary embolism from the right atrial shunt after acute type a aortic dissection surgery

This is one case report of a 46-year-old Chinese male with type A acute aortic dissection. It is an emergent surgery including Bentall procedure, interposition graft replacement of aortic arch, stented descending aorta with the modified right atrial shunt technique. In the early post operation period, the patient was complicated with pulmonary embolism. Pulmanary arteriography showed that the right main pulmonary embolism without an extrinsic compression. After the anticoagulant therapy, the patient was well recovered and discharged from hospital 1 month later. The origin of pulmonary embolism in the patient was believed to be the thrombosis in the shunt fistula. The right atrial shunt-related complications haven't been reported for more than thirty years. Pulmonary embolism could be a severe complication after the right atrial shunt in acute type A aortic dissection.

Acute type-A aortic dissection with obstruction of the right coronary artery

Occlusion of a coronary artery by an acute type A aortic dissection presents a life-threatening emergency that is rarely seen and easy to misdiagnose. We present the case of a 75-year-old male who experienced sudden onset of severe left-sided chest pain due to an acute type A aortic dissection that obstructed the right coronary artery. Following an initial misdiagnosis of acute coronary syndrome, imaging revealed the presence of an aortic dissection. An emergency modified Bentall procedure was performed, in which the damaged aorta and aortic valve were replaced.

Medical management of acute type a aortic dissection in association with early open repair of acute limb ischemia may prevent aortic surgery

Background:

Acute type A aortic dissection (AAAD) is a cardiovascular emergency with a high potential for death. Rapid surgical treatment is indicated to prevent fatal complications. Aggressive appropriate medical management starts at first suspicion and is essential to prevent exacerbation or rupture of the dissection. Despite improved surgical techniques, perioperative care and the development of specialized cardiovascular centers, mortality remains high. Organ ischemia is a catastrophic manifestation of aortic dissection, demanding acute surgical intervention in specialized cardiovascular centers.

Case Report:

We present the case of a 62-year-old man with isolated acute limb ischemia due to an acute type A aortic dissection treated in a regional general hospital, without a specialized cardiovascular service, with immediate open malperfusion repair and aggressive medical management. The patient did not undergo further surgical aortic repair, and after a 30-month follow-up he remains symptom free and in good clinical condition, suggesting that although aortic surgery remains the gold standard for treatment of acute Type A dissection, appropriate medical management and early malperfusion repair may offer an initial limb- or life-saving procedure.

Conclusions:

This staged approach gives clinicians more time to properly evaluate and transfer the patient to a specialized cardiovascular center, and in some cases may even offer a definite treatment.

Endovascular treatment of two pseudoaneurysms originating from the left ventricle

A 67-year-old woman resented with an acute type A aortic dissection, which was treated surgically with aortic valve replacement as a composite graft with reimplantation of the coronary arteries. At the end of surgery, a left-ventricular venting catheter was placed through the apex and closed with a buffered suture. Consecutive computed tomography (CT) examinations verified a growing apex pseudoaneurysm. Communication between the ventricle and the pseudoaneurysm was successfully closed with an Amplatz septal plug by the transfemoral route. Follow-up CT showed an additional pseudoaneurysm, which also was successfully closed using the same method.