Cryopreserved Allograft in the Management of Native and Prosthetic Aortic Infections.

BACKGROUND: The management of patients with aortic native and prosthetic infections is associated with significant morbidity and mortality. We describe a single-center experience with the use of cryopreserved allografts for the treatment of aortic infections, and compare outcomes with rifampin-soaked grafts and extra-anatomic bypass. METHODS: We retrospectively reviewed all patients who underwent an operative intervention for aortic infection at our tertiary care center from August 2007 to August 2017. Demographic data, preoperative work-up, procedural details, and outcomes were collected for each treatment modality. RESULTS: Thirty-two patients had aortic revascularization for aortic infection. Seventeen patients had cryopreserved allografts, 10 had rifampin-soaked grafts, and 5 had extra-anatomic bypass. Sixteen patients (50%) had native aortic infection and 16 patients (50%) had prosthetic aortic infection. Eighteen had involvement of the infrarenal abdominal aorta, 12 of the paravisceral aorta, and 2 of the descending thoracic aorta. Early mortality was 5.9% (1/17) for the cryopreserved group, 10% (1/10) for the rifampin-soaked group, and 40% (2/5) for the extra-anatomic bypass group. Early graft-related complications occurred in 1 patient (cryopreserved group). Mean follow-up was 34.8 months. Late death occurred in 4 patients with cryopreserved allografts, 2 with rifampin-soaked grafts and none with extra-anatomic bypass. Late graft-related complications occurred in 4 patients (cryopreserved group). Only 1 patient had recurrence of aortic infection (cryopreserved group) and 2 patients had limb loss (1 from the cryopreserved group and 1 from the rifampin-soaked group). At 1 month, 6 months, 1 year, and 3 years, estimated survival for patients with cryopreserved allografts was 94%, 82%, 75%, and 64%, respectively. CONCLUSIONS: The management of aortic infections is challenging. In patients who do not need immediate intervention, in situ aortic reconstruction with cryopreserved allografts is a viable treatment modality with relatively low morbidity and mortality.

Is Esophagectomy for Benign Conditions Benign?

BACKGROUND: Outcomes data on esophagectomy performed for benign conditions is scarce. Using the National Surgical Quality Improvement Program database, we sought to analyze outcomes of esophagectomy performed for benign conditions. METHODS: The National Surgical Quality Improvement Program database was queried for all esophagectomies performed from 2005 to 2015. Outcomes for benign conditions were analyzed and compared with outcomes for malignant conditions. RESULTS: Esophagectomy was performed in 7,477 patients during the study period. Of those, 6,762 underwent esophagectomy for malignant conditions and 715 for benign conditions. For patients with benign conditions, reconstruction was performed using gastric conduit in 631 and colon/intestine in 84. The anastomosis was intrathoracic in 420 and cervical in 295. Benign esophagectomies were more likely to be emergent (10.1% vs 0.4%, p < 0.001). In addition, these patients had a longer hospital length of stay (17.2 days vs 14.5 days, p < 0.001) and higher occurrence of Clavien-Dindo grade IV complications (25% vs 20%, p = 0.003). Mortality was similar at 4%. In patients with benign conditions, reconstruction with colon/intestine had higher occurrence of Clavien-Dindo Grade IV complications (37% vs 23%, p = 0.006), surgical wound infections (33% vs 16%, p < 0.001), and death (10% vs 4%, p = 0.017) compared with gastric reconstruction. Site of anastomosis did not affect outcomes. CONCLUSIONS: Benign esophagectomies are associated with significant morbidity. Although the site of the anastomosis does not alter outcomes, use of colon/intestine conduit should be pursued with caution.

Clinical utility of carotid duplex ultrasound prior to cardiac surgery.

OBJECTIVE: Clinical utility and cost-effectiveness of carotid duplex examination prior to cardiac surgery have been questioned by the multidisciplinary committee creating the 2012 Appropriate Use Criteria for Peripheral Vascular Laboratory Testing. We report the clinical outcomes and postoperative neurologic symptoms in patients who underwent carotid duplex ultrasound prior to open heart surgery at a tertiary institution. METHODS: Using the combined databases from our clinical vascular laboratory and the Society of Thoracic Surgery, a retrospective analysis of all patients who underwent carotid duplex ultrasound within 13 months prior to open heart surgery from March 2005 to March 2013 was performed. The outcomes between those who underwent carotid duplex scanning (group A) and those who did not (group B) were compared. RESULTS: Among 3233 patients in the cohort who underwent cardiac surgery, 515 (15.9%) patients underwent a carotid duplex ultrasound preoperatively, and 2718 patients did not (84.1%). Among the patients who underwent carotid screening vs no screening, there was no statistically significant difference in the risk factors of cerebrovascular disease (10.9% vs 12.7%; P = .26), prior stroke (8.2% vs 7.2%; P = .41), and prior transient ischemic attack (2.9% vs 3.3%; P = .24). For those undergoing isolated coronary artery bypass grafting (CABG), 306 (17.8%) of 1723 patients underwent preoperative carotid duplex ultrasound. Among patients who had carotid screening prior to CABG, the incidence of carotid disease was low: 249 (81.4%) had minimal or mild stenosis (<50%); 25 (8.2%) had unilateral moderate stenosis (50%-69%); 10 (3.3%) had bilateral moderate stenosis; 9 (2.9%) had unilateral severe stenosis (70%-99%); 5 (1.6%) had contralateral moderate stenosis; 2 (0.7%) had bilateral severe stenosis; 4 (1.3%) had unilateral occluded with contralateral less than 50% stenosis, 1 (0.3%) had unilateral occluded with contralateral (70%-99%) stenosis; and 1 had bilateral occluded carotid arteries. Primary outcomes of patients who underwent isolated CABG showed no difference in the perioperative mortality (2.9% vs 4.3%; P = .27) and stroke (2.9% vs 2.6%; P = .70) between patients undergoing preoperative duplex scanning and those who did not. Primary outcomes of patients who underwent open heart surgery also showed no difference in the perioperative mortality (5.1% vs 6.9%; P = .14) and stroke (2.6% vs 2.4%; P = .85) between patients undergoing preoperative duplex scanning and those who did not. Operative intervention of severe carotid stenosis prior to isolated CABG occurred in 2 of the 17 patients (11.8%) identified who underwent carotid endarterectomy with CABG. CONCLUSIONS: In this study, the correlation between preoperative duplex-documented high-grade carotid stenosis and postoperative stroke was low. Prudent use of preoperative carotid duplex ultrasound should be based on the presence of cerebrovascular symptoms and the type of open heart surgery.

Beyond the Aortic Root: Staged Open and Endovascular Repair of Arch and Descending Aorta in Patients With Connective Tissue Disorders.

BACKGROUND: Improvements in care have prolonged survival of patients with connective tissue disorders (CTDs), but their entire native aorta remains at risk. Little data are available to guide treatment. Objectives were to characterize patients, describe repair methods, and assess outcomes. METHODS: From 1996 to 2012, 527 patients with CTDs underwent cardiovascular operations. Beyond the root, arch and descending repair was performed in 121 patients (23%) for aneurysm (n = 17), acute complicated dissection (n= 5), or chronic dissection with aneurysmal degeneration (n = 99). CTD diagnoses included Marfan (n = 107), marfanoid (n = 7), Ehlers-Danlos (n = 4), and Loeys-Dietz (n = 3) syndromes. Eighty-seven (72%) had a previous ascending aorta repair, including 51 (57%) for type A dissection. Median interval to distal operation was 8.4 years. Index procedures for repair beyond the root were elephant trunk (ET) stage I (n = 63), open descending repair (n = 26), thoracoabdominal repair (n = 13), total arch replacement (n = 13), and stent-grafting (n = 6: frozen ET 3, thoracic endovascular aortic repair [TEVAR] 3). Median follow-up was 4.4 years. RESULTS: Operative mortality was 2.5% (3 of 121). No paralysis occurred, but 3 patients (2.5%) had nonpermanent stroke, 4 (3.3%) required dialysis, 12 (10%) required tracheostomy, and 13 (11%) underwent reoperation for bleeding. During follow-up, 67 patients underwent 85 additional distal aortic procedures (58 open, 27 endovascular, 49 of which were stage II ET). By 10 years, probability of at least 1 reintervention was 61%. At 1, 5, and 10 years, estimated survival was 91%, 79%, and 62%, and event-free survival was 52%, 35%, and 24%, respectively. CONCLUSIONS: Most patients with CTDs who require operations beyond the aortic root have aortic dissection and require multiple reinterventions. Staged repair strategies, including open repair in combination with TEVAR, are feasible, and benefits outweigh risks. These patients require lifelong imaging surveillance.

Nonselective carotid artery ultrasound screening in patients undergoing coronary artery bypass grafting: Is it necessary?

OBJECTIVES: To determine whether nonselective preoperative carotid artery ultrasound screening alters management of patients scheduled for coronary artery bypass grafting (CABG), and whether such screening affects neurologic outcomes. METHODS: From March 2011 to September 2013, preoperative carotid artery ultrasound screening was performed on 1236 of 1382 patients (89%) scheduled to undergo CABG. Carotid artery stenosis (CAS) was classified as none or mild (any type 0%-59% stenosis), moderate (unilateral 60%-79% stenosis), or severe (bilateral 60%-79% stenosis or unilateral 80%-100% stenosis). RESULTS: A total of 1069 (86%) had

Does preoperative carotid stenosis screening reduce perioperative stroke in patients undergoing coronary artery bypass grafting?

A number of institutions routinely perform carotid artery ultrasound screening before coronary artery bypass grafting (CABG) to identify carotid artery disease requiring revascularization before or during CABG, with the expectation of reducing perioperative neurologic events. The assumptions are that carotid disease is causally related to perioperative stroke and that prophylactic carotid revascularization decreases the risk of post-CABG neurologic events. Although carotid artery stenosis is a known risk factor for perioperative stroke in patients undergoing CABG, it might be a surrogate marker for diffuse atherosclerotic disease rather than a direct etiologic factor. Moreover, the benefit of prophylactic carotid revascularization in patients with asymptomatic unilateral carotid disease is uncertain. Therefore, we have reviewed the literature for evidence that preoperative carotid artery screening, by identifying patients with significant carotid artery stenosis and altering their management, reduces perioperative neurologic events in those undergoing CABG.

Surgical revascularization techniques that minimize surgical risk and maximize late survival after coronary artery bypass grafting in patients with diabetes mellitus.

OBJECTIVE: To identify surgical revascularization techniques that minimize surgical risk and maximize late survival in patients with diabetes undergoing coronary artery bypass grafting (CABG). METHODS: From January 1972 to January 2011, 11,922 patients with diabetes underwent primary isolated CABG. The revascularization techniques investigated included bilateral internal thoracic artery (BITA) grafting (n=938; 7.9%) versus single ITA (SITA) grafting, off-pump (n=602; 5.0%) versus on-pump CABG, and incomplete (n=2109; 18%) versus complete revascularization. The median follow-up was 7.8 years and total follow-up, 104,516 patient-years. Multivariable analyses were performed to assess the effects of surgical techniques on hospital outcomes and long-term mortality. RESULTS: After adjusting for patient characteristics, BITA versus SITA grafting was associated with a 21% lower late mortality (68% confidence limits, 16%-26%). However, BITA grafting was also associated with more deep sternal wound infections (DSWIs), but the considerable mortality from DSWI minimally affected overall survival because of its rare occurrence. The risk factors for DSWI were female sex (80% increased risk), higher body mass index (7% increased risk per kg/m2), medically treated diabetes (73% increased risk), previous myocardial infarction (58% increased risk), and peripheral arterial disease (73% increased risk). Off-pump and on-pump CABG had similar results. Complete versus incomplete revascularization had similar hospital outcomes; however, complete revascularization was associated with 10% lower late mortality (68% confidence limits, 7.0%-13%). CONCLUSIONS: BITA grafting with complete revascularization maximizes long-term survival and is recommended for patients with diabetes undergoing CABG. BITA grafting should be used in all patients with diabetes whose risk of DSWI is low. It might be best avoided in obese diabetic women with diffuse atherosclerotic burden-those at greatest risk of developing these infections.