Optimal stent length and distal positioning of frozen elephant trunks deployed from the aortic zone 0 for type A acute aortic dissection.

OBJECTIVES: To investigate the optimal stent length and distal positioning of frozen elephant trunks (FETs) in patients with type A acute aortic dissection (TAAD). METHODS: Between October 2014 and April 2021, 191 patients (FET-150 group: 37 patients; stent length, 150 mm; 66.3 ± 12.6 years and FET-non-150 group: 154 patients; 60, 90, or 120 mm; 64.1 ± 12.5 years) underwent total arch repair with FETs for TAAD using the "zone 0 arch repair" strategy. In the FET-150 group, the proximal stent end was positioned at the innominate artery origin of the arch. In the FET-non-150 group, the distal stent end was to be positioned just proximal to the aortic valve level using transesophageal echocardiography. The proximal end of the non-stented FET part was sutured to an arch graft together with the aortic wall at 1 to 2 cm proximal to the innominate artery origin. RESULTS: Distal stent ends were positioned at the thoracic vertebrae (Th) 4-5, 6-7, 8-9, and 10 levels in 0 (0%), 12 (32.4%), 25 (67.6%), and 0 (0%) patients, respectively, in the FET-150 group, and in 6 (3.9%), 98 (63.6%), 49 (31.8%), and 1 (0.7%), respectively, in the FET-non-150 group. No between-group difference in postoperative mortality was noted. The incidence of postoperative residual distal malperfusion and new-onset spinal cord ischemia in the FET-150 versus FET-non-150 groups were 2.7% versus 6.5% (P = .62) and 0% versus 1.9% (P = 1.00), respectively. CONCLUSIONS: FET positioning with the distal stent end at around Th 8 can reduce residual distal malperfusion when a FET with a 150-mm stent is deployed from the aortic zone 0 in patients with TAAD undergoing total arch repair.

Aortic remodeling, reintervention, and survival after zone 0 arch repair with frozen elephant trunks for acute type A aortic dissection: Midterm results.

Objectives: To investigate the midterm results after zone 0 arch repair with frozen elephant trunks for acute type A aortic dissection. Methods: Between October 2014 and April 2021, 196 patients underwent zone 0 arch repair with frozen elephant trunks for acute type A aortic dissection. The true lumen area, aortic lumen area, and false lumen status were assessed at four aortic levels, the proximal and distal descending thoracic aorta (level A and level B, respectively), celiac artery branching (level C), and terminal aorta (level D). Aortic remodeling (postoperative area as a percentage of the preoperative area) was classified into 3 groups, positive (true lumen area ≥120% with aortic lumen <120% or true lumen area ≥80% with aortic lumen <80%), minimal (80% ≤ true lumen area and aortic lumen area <120%), and negative remodeling (all other changes). Results: In-hospital mortality was 13 (6.6%) patients. The overall survival rate was 85.1% at 5 years. The freedom from distal aortic reintervention was 89.9% at 5 years. The prevalence of completely thrombosed or obliterated false lumen at 2 years was 96.8% at level A, 88.4% at level B, 47.2% at level C, and 27.6% at level D. The prevalence of positive aortic remodeling at 2 years was 84.7% at level A, 75.0% at level B, 29.2% at level C, and 16.7% at level D. Conclusions: Zone 0 arch repair with frozen elephant trunks for acute type A aortic dissection can avoid invasive aortic arch resection and facilitate aortic remodeling of the descending thoracic aorta. The FET effect on aortic remodeling is limited at the aortic level below the FET stent end.

Subvalvular tissue mimicking valve detachment-like pathology by vertical aneurysm in Takayasu's arteritis.

A 74-year-old woman with Takayasu's arteritis previously underwent aortic valve replacement at 59 years old. She was initially diagnosed with aortic valve stenosis and valve detachment. Moreover, preoperative computed tomography revealed ∼40 mm distance between the coronary artery ostium and the prosthetic valve (PV) and an aneurysm at the sinus of Valsalva. A Bentall procedure was subsequently performed. Intraoperative findings revealed no detachment of the PV. Following PV removal, the subvalvular tissue was noted to protrude into the left ventricular outflow tract. Subsequently, it was revealed that the tissue could have interfered with the PV; however, the PV appeared to have been detached considering the imaging findings.

Right coronary ostium occlusion by aortic valve tumor during systole.

Here, we present a case of acute myocardial infarction caused by an aortic valve tumor. Electrocardiography (ECG)-gated four-dimensional computed tomography revealed obstruction of the right coronary ostium by a mobile mass during systole. To ensure an accurate diagnosis of angina in patients without significant coronary artery disease, ECG-gated four-dimensional computed tomography is useful because it can simultaneously visualize the coronary ostium and arteries, aortic valve leaflets, and mass.

[Traction-assisted Negative Pressure Wound Therapy for Pediatric Poststernotomy Mediastinitis:Report of Two Cases].

We herein report two cases of pediatric poststernotomy mediastinitis treated by traction-assisted negative pressure wound therapy (NPWT) with Zip Surgical Skin Closure (Zip), which is a non-invasive skin closure device. We used this device with NPWT in cases of pediatric poststernotomy mediastinitis to stabilize the sternum and reduce the natural retractive forces of the skin. The patients were two boys (two and three months old), with an onset of infection at 13 and eight postoperative days, respectively. The culture examination detected methicillin-susceptible Staphylococcus aureus in both cases. Traction-assisted NPWT with Zip was performed at-75 mmHg for 16 and 33 days, and the wounds healed completely. In conclusion, this modification was successfully applied to treat pediatric poststernotomy mediastinitis and may help reduce the duration of treatment.

Avoiding anticoagulation drugs for postoperative atrial fibrillation enabled successful conservative treatment of left atrial dissection: a case report.

BACKGROUND: Left atrial dissection is a rare complication of cardiac surgery, most commonly associated with mitral valve surgery. Herein, we report on the successful conservative treatment of left atrial dissection while avoiding anticoagulation therapy. CASE PRESENTATION: A 64-year-old man developed left atrial dissection during operation for acute type A aortic dissection, most likely due to retrograde cardioplegia cannulation. As there was no connection between the left atrial dissection cavity and the left atrium on enhanced computed tomography, we did not administer anticoagulants to prevent expansion of the left atrial dissection cavity. However, the patient developed atrial fibrillation, which was successfully managed by beta-blocker and amiodarone administration. Follow-up imaging showed gradual left atrial dissection reduction, and the patient was started on anticoagulation therapy. CONCLUSION: We were able to resolve left atrial dissection by preventing the use of anticoagulation therapy in the acute stage by managing the atrial fibrillation with antiarrhythmic drugs.

Calcified Aortic Wall Removal for Dysphagia Aortica Caused by Chronic Traumatic Aortic Pseudoaneurysm.

In this study, we report a case of a 45-year-old man with dysphagia aortica secondary to chronic traumatic aortic pseudoaneurysm of the aortic isthmus. He had been involved in a motor vehicle accident 27 years earlier. Computed tomography demonstrated a severely calcified aortic pseudoaneurysm of the aortic isthmus that compressed the esophagus extrinsically. An invasive surgical procedure involving a graft replacement and removal of the calcified aortic wall released the esophageal compression and completely improved the patient's symptoms. To the best of our knowledge, a case of dysphagia aortica caused by calcified pseudoaneurysm has never been reported.

Direct Abdominal Aortic Access for Thoracic Endovascular Aortic Repair in a Patient with Severe Aortic and Arterial Calcification.

Aortic and arterial calcification is a complication of advanced atherosclerosis and is a critical intraoperative issue that can reduce the ability to achieve safe and adequate access for stent graft introduction. Different vascular access sites are used to deliver stent grafts when a standard transfemoral or iliac access is not feasible. We report a challenging case of a direct transabdominal aortic thoracic endovascular aortic repair for a thoracic aortic aneurysm complicated with severe aortic and arterial calcification, in which the noncalcified area of the infrarenal abdominal aorta was extremely limited. This may be a reasonable access site, especially for patients with severe aortic and arterial calcification.

[Thoracic Endovascular Repair for Chronic Aortic Dissection with Aberrant Origin of the Left Vertebral Artery;Report of a Case].

We herein report a case of thoracic endovascular aortic repair( TEVAR) for chronic aortic dissection with an aberrant left vertebral artery( LVA) originating from the aortic arch. A 51-year-old man with a medical history of Stanford type B acute aortic dissection 2 years ago was transferred to our institution for the treatment of an aortic expansion. Computed tomography showed a large entry just distal to the takeoff of the left subclavian artery and a dilated dissected thoracic aorta. A left cervical incision over the anterior border of the sternocleidomastoid was made, and the LVA was identified. The proximal LVA was ligated and anastomosed to the left common carotid artery in an end-to-side fashion. After completion of the carotid-subclavian bypass, TEVAR was performed in the usual fashion. The postoperative course was uneventful without stroke or spinal cord injury. At the 1-year follow-up, the false lumen had shrunk and the LVA remained patent.

[Tricuspid Valve Replacement Preserving the Leaflets in a Congenitally Corrected Transposition of the Great Arteries;Report of a Case].

In patients with a congenitally corrected transposition of the great arteries (ccTGA), the regurgitation of the systemic atrioventricular valve (SAVV) increases and anatomical right ventricular (ARV) dysfunction often progressively develops. A low systemic ventricular ejection fraction( SVEF) is a risk factor for mortality. However, in patients with a low ejection fraction of ARV, it is unclear how to best perform valve replacement for patients with regurgitation of SAVV. A 70-year-old female with respirator discomfort was admitted to our hospital and diagnosed to have situs solitus ccTGA, severe SAVV regurgitation, and ARV dysfunction. Her ARV ejection fraction was 25% and she was therefore dependent on inotropic agents. We successfully performed a tricuspid valve replacement while preserving the leaflets, the chorda tendineae's, and papillary muscles, and placing the lead for cardiac resynchronization therapy on the ARV. Her postoperative course was uneventful. Thereafter, she was discharged 6 weeks after surgery.