Davide Carino

Favorable late survival after aortic surgery under straight deep hypothermic circulatory arrest

Background: Surgical and cerebral protection strategies in aortic arch surgery remain under debate. Perioperative results using deep hypothermic circulatory arrest (DHCA) have been associated with favorable short‐term mortality and stroke rates. The present study focuses on late survival in patients undergoing aortic surgery using DHCA. Methods: A total of 613 patients (mean age, 63.7 years) underwent aortic surgery between January 2003 and December 2015 using DHCA, with 77.3% undergoing hemiarch replacement and 20.4% undergoing arch replacement, with a mean DHCA duration of 29.7 ± 8.5 minutes (range, 10–62 minutes). We examined follow‐up extending up to a mean of 3.8 ± 3.4 years (range, 0–14.1 years). Results: Operative mortality was 2.9%, and the stroke rate was 2%. Survival was 92.2% at 1 year and 81.5% at 5 years, significantly lower than the values in an age‐ and sex‐matched reference population. In elective, nondissection first‐time surgeries (n = 424), survival was similar to that of the reference group. Acute type A aortic dissection (hazard ratio [HR], 4.84; P = .000), redo (HR, 4.12; P = .000), and descending aortic pathology (HR, 5.54: P = .000) were independently associated with reduced 1‐year survival. Beyond 1 year, age (HR, 1.07; P = .000), major complications (HR, 3.11; P = .000), and atrial fibrillation (HR, 2.47; P = .006) were independently associated with poor survival. DHCA time was not significantly associated with survival in multivariable analysis. Conclusions: Aortic surgery with DHCA can be performed with favorable late survival, with the duration of DHCA period having only a limited impact. However, these results cannot be generalized for very long durations of DHCA (>50 minutes), when perfusion methods may be preferable. In elective, nondissection first‐time surgeries, a late survival comparable to that in a reference population can be achieved. Early survival is adversely affected by aortic dissection, redo status, and disease extent.

Parma tracheostomy technique: a hybrid approach to tracheostomy between classical surgical and percutaneous tracheostomies

BACKGROUND The aim of our study is to compare the classical surgical tracheostomy (TT) technique with a modified surgical technique designed and created by the cardiothoracic surgery staff of our department to reduce surgical trauma and postoperative complications. This modified technique combines features of percutaneous TT and surgical TT avoiding the use of specialized tools, which are required in percutaneous TT. METHODS From October 2008 to March 2014 we performed 67 tracheostomies using this New Modified Surgical Technique (NMST) and 56 TT with the Classical Surgical Technique (CST). We collected data about the early clinical complications, deaths TT-related, deaths due to other complications and the presence of late TTs complications were performed by a telephone follow-up. SPSS software (IMB version 21) was used for the statistical analysis. Categorical data were treated with chi-square test and continuous data were treated with t-test for independent samples. RESULTS NMST group had a significant lower number of early complications (P=0.005) compared to CST group (5 vs. 15). In-hospital mortality was significantly higher in CST group (18 deaths vs. 4 in NMST group, P=0.001) but we registered only one case of TT-related mortality in CST group (P=0.280). We did not note other differences between the two groups regarding short or mid-long term complications. CONCLUSIONS In our experience the NMST demonstrated to be easily safe and reproducible with an amount of early, mid- and long-term complications similar to the CST; furthermore the aesthetic results of the procedure appear similar to those of percutaneous TT.

Thoracic Endovascular Aortic Repair Through Cardiac Apex in the Setting of Thoracic Aortic Rupture

Treatment of thoracic aortic rupture poses a substantial challenge for the aortic surgeon. The advent of thoracic endovascular aortic repair (TEVAR) revolutionized the treatment of this heterogeneous group of diseases. Some patients suitable for TEVAR, however, present severe peripheral vascular diseases that can prevent standard retrograde delivery of the stent graft through the femoral artery. In this report, we present a case series of 5 patients with thoracic aortic rupture successfully treated with cardiac transapical TEVAR.

Open Replacement of the Thoracoabdominal Aorta: Short- and Long-term Outcomes at a Single Institution

Abstract Background Despite much progress in the surgical and endovascular treatment of thoracoabdominal aortic diseases (TAADs), there is no consensus regarding the optimal approach to minimize operative mortality and end‐organ dysfunction. We report our experience in the past 16 years treating TAAD by open surgery. Methods A retrospective review of all TAAD patients who underwent an open repair since January 2000 was performed. The primary endpoints included early morbidity and mortality, and the secondary endpoints were overall death and rate of aortic reintervention. Results There were 112 patients treated by open surgery for TAAD. Mean age was 66 ± 10 years and 61 (54%) were male. Seventy‐seven (69%) patients had aneurysmal degeneration without aortic dissection and the remaining 35 (31%) had a concomitant aortic dissection. There were 12 deaths (10.7%) and they were equally distributed between the aneurysm and dissection groups (p = 0.8). The mortality for elective surgery was 3.2% (2/61). The rate of permanent paraplegia and stroke were each 2.6% (3/112). The rate of cerebrovascular accident was significantly higher in the dissection group (8.5% vs. 1.2%, p = 0.05). The survival at 1, 5, and 10 years was 80.6, 56.1, and 32.7%, respectively. Conclusion Our data confirm that open replacement of the thoracoabdominal aorta can be performed in expert centers quite safely. Different aortic pathologies (degenerative aneurysm vs. dissection) do not influence the short‐ and long‐term outcomes. Open surgery should still be considered the standard in the management of TAAD.

Abdominal Aortic Aneurysm: Evolving Controversies and Uncertainties

Abdominal aortic aneurysm (AAA) is defined as a permanent dilatation of the abdominal aorta that exceeds 3 cm. Most AAAs arise in the portion of abdominal aorta distal to the renal arteries and are defined as infrarenal. Most AAAs are totally asymptomatic until catastrophic rupture. The strongest predictor of AAA rupture is the diameter. Surgery is indicated to prevent rupture when the risk of rupture exceeds the risk of surgery. In this review, we aim to analyze this disease comprehensively, starting from an epidemiological perspective, exploring etiology and pathophysiology, and concluding with surgical controversies. We will pursue these goals by addressing eight specific questions regarding AAA: (1) Is the incidence of AAA increasing? (2) Are ultrasound screening programs for AAA effective? (3) What causes AAA: Genes versus environment? (4) Animal models: Are they really relevant? (5) What pathophysiology leads to AAA? (6) Indications for AAA surgery: Are surgeons over-eager to operate? (7) Elective AAA repair: Open or endovascular? (8) Emergency AAA repair: Open or endovascular?

Transapical access for thoracic endovascular aortic repair to elephant trunk completion

The 2-stage elephant trunk procedure is widely used to treat extensive disease of the aortic arch and descending thoracic aorta. The 2nd stage of the procedure can be accomplished with both a standard surgical procedure and a retrograde transfemoral endovascular approach using the dangling graft as proximal landing zone. However, in some patients, severe disease of iliofemoral vessels can prevent standard retrograde thoracic endovascular aortic repair (TEVAR). In such cases, an alternative route to gain endovascular access must be used. Herein, we report a case of anterograde cardiac transapical approach for TEVAR as a 2nd stage of an elephant trunk procedure.

The role of genetic testing in the prevention of acute aortic dissection

Although much has been learned about disease of the thoracic aorta, most diagnosis of thoracic aortic aneurysm (TAA) is still incidental. The importance of the genetic aspects in thoracic aortic disease is overwhelming, and today different mutations which cause TAA or alter its natural history have been discovered. Technological advance has made available testing which detects genetic mutations linked to TAA. This article analyses the genetic aspects of TAA and describes the possible role of genetic tests in the clinical setting in preventing devastating complications of TAA.

Non-A non-B aortic dissection: a systematic review and meta-analysis

OBJECTIVES Non-A non-B aortic dissections are rare, and little is known about their natural history, indications for surgery and operative results. We aim to examine the literature to summarize what is known of the natural history of non-A non-B dissections and evaluate the outcomes of the therapeutic options available. METHODS An extensive literature search was performed using MEDLINE to find all published studies that report data on the natural history and outcomes of patients with non-A non-B aortic dissection. Data on patients treated with medical therapy were extracted to characterize the natural history. Primary end points included 30-day mortality, stroke and retrograde type A dissection. RESULTS Of the 423 studies found, 14 articles (433 patients) fulfilled the inclusion criteria for quantitative analysis. The proportion of medically treated patients ranged from 5 to 54% with a pooled rate of 36% (50/138). The 30-day mortality of patients treated with medical therapy was 14% (7/50). The overall estimated proportion of 30-day mortality for patients who underwent intervention was 3.6% [95% confidence interval (CI) 1.7-5.6%], retrograde type A dissection was 2.6% (95% CI 0.8-4.4%) and stroke was 2.8% (95% CI 1.0-4.5%). CONCLUSIONS Despite the likelihood of reporting and selection bias, patients with non-A non-B dissection often have a complicated course requiring some form of intervention. The 30-day mortality of patients treated with medical therapy seems higher than surgical or endovascular therapy. Ideally, further large prospective studies are necessary to confirm our suggestion that early intervention may be indicated in non-A non-B dissections.

Massive saccular aneurysm of the right sinus of Valsalva

A 59-year-old man with no past medical history underwent trans-thoracic echocardiography (TTE) to investigate a cardiac murmur. The TTE revealed an aortic root aneurysm with preserved aortic valve function. A computed tomography scan was subsequently obtained, which showed a saccular aneurysm of the right sinus of Valsalva extending towards the right ventricle (Panels A and B). Its dimensions were 3.3 2.6 3.3 cm, while the overall diameter was 6.1 cm at the level of the aortic root. CT coronary angiography showed no coronary stenosis. A coronary angiogram was not performed due to the close proximity of the aneurysm to the right coronary artery ostium. The patient was scheduled for surgery. Intraoperatively a massive saccular aneurysm was observed arising from the right sinus of Valsalva, just superior to the aortic annulus (Panel C) with an extremely large neck. The tissue surrounding the right coronary artery ostium was extremely oedematous and fibrotic, suggesting possible infective etiology. A bacteriological swab of the aneurysm was taken. A standard Bentall procedure with a 25 mm St. Jude valved conduit was performed, without complications. The post-operative course was uneventful, and the patient was discharged on the 5th post-operative day. Swab microscopy and culture results were negative. Saccular aneurysms of the sinuses of Valsalva are rare. When the neck of the aneurysm is small, exclusion from the circulation can be achieved with direct closure. Otherwise an aortic root replacement is indicated to prevent rupture.

Early Coronary Thrombosis Without St-segment Elevation Following Repair of Acute Aortic Dissection

Acute coronary thrombosis after emergent surgery for acute Type A aortic dissection is a rare event that can remain undiagnosed in absence of typical electrocardiogram readings. We report a case of left anterior descending artery thrombosis without ST-segment elevation three days after surgical repair, which was successfully treated with angioplasty and stenting.