Underwent Acute Type A Aortic Dissection Repair Research Articles

Long-Term Results of Valve Sparing Aortic Root Replacement in Acute Type A Aortic Dissection

Valve preservation in acute type A aortic dissection (ATAAD) can be accomplished with root repair or replacement. Long-term valve durability with root repair has been established, but limited data exists regarding long-term durability of valve sparing root replacement (VSRR). This study compared long-term results of VSRR to root repair in ATAAD. From 2005-2023, 866 patients underwent ATAAD repair, of which 675 underwent root repair and 191 underwent root replacement (VSRR = 65, Bentall = 126). VSRR patients were compared to 123 patients who underwent valve resuspension and root repair (Root Repair) with postoperative echocardiograms ≥ 1 year. VSRR patients were younger (VSRR 44±11 vs. Root Repair 55±13 years, p<0.001). Preoperatively, 57% of VSRR and 35% of Root Repair patients had ≥ moderate aortic insufficiency. Cardiopulmonary bypass and, myocardial ischemia times were significantly longer in VSRR (p<0.001). Postoperative echocardiograms with ≥ 1 year follow-up were analyzed in 58 VSRR patients with median follow-up of 4.8 [IQR 3,12] years and in 123 Root Repair patients with median follow-up of 3.6 [IQR 3, 8] years. At 10 years, VSRR patients had superior freedom from > mild aortic insufficiency (VSRR 91% vs. Root Repair 49%, p <0.001). At 10 years, freedom from aortic valve replacement was equivalent (VSRR 98% vs. Root Repair 92%, p=0.269). VSRR provides equivalent long-term valve durability as root repair in ATAAD, even in patients with moderate or severe aortic insufficiency. In select young patients who require root replacement during ATAAD repair, VSRR represents an ideal therapy.

Sex-Related Differences Between Patients Undergoing Surgery for Acute Type A Aortic Dissection.

Introduction This study aimed to evaluate the sex-specific characteristics and surgical outcomes in patients with acute type A aortic dissection (ATAAD). Materials and methods We reviewed the surgical records of patients who underwent ATAAD repair at our institution between 2004 and 2020 (n=213). Results Of the 213 patients, 100 (46.9%) were male, and 113 (53.1%) were female. Males were younger than females (62.5 vs. 72.9 years, p<0.0001). Females had more nonspecific symptoms (p=0.04), more frequently developed ATAAD before noon (45.0% vs. 53.1%, p=0.01), and had a significantly longer time from onset to surgery (425.1 vs. 595.8 min, p=0.03). The ascending aorta was replaced more frequently in females than in males (54.5% vs. 72.8%, p<0.01). No significant difference was observed in the in-hospital mortality rate between males and females (9.0% vs. 10.6%, p=0.69). The multivariable logistic analysis demonstrated that being male was not an independent predictor of operative mortality (OR, 0.96; 95% CI, 0.18-5.21; p=0.96). At 10 years, males had significantly better long-term survival rates in the unadjusted cohort than females (79.4% vs. 55.9%, p=0.02). Conclusions Male sex was not an independent predictor of early death in patients with ATAAD after surgery, although significant differences were noted in terms of age, onset time, chief complaint, imaging findings, and surgical procedures. A sex-based management strategy involving specific differences should be considered to improve outcomes.

S100B predicts neurological injury and 30-day mortality following surgery for acute type A aortic dissection: an observational cohort study

BackgroundNeurological injuries are frequent following Acute Type A Aortic Dissection (ATAAD) repair occurring in 4–30% of all patients. Our objective was to study whether S100B can predict neurological injury following ATAAD repair.MethodsThis was a single-center, retrospective, observational study. The study included all patients that underwent ATAAD repair at our institution between Jan 1998 and Dec 2021 and had recorded S100B-values. The primary outcome measure was neurological injury, defined as focal neurological deficit or coma diagnosed by clinical assessment with or without radiological confirmation and with a symptom duration of more than 24 h. Secondary outcome measure was 30-day mortality.Results538 patients underwent surgery during the study period and 393 patients, had recorded S100B-values. The patients had a mean age of 64.4 ± 11.1 years and 34% were female. Receiver operating characteristic curve for S100B 24 h postoperatively yielded area under the curve 0.687 (95% CI 0.615–0.759) and best Youden’s index corresponded to S100B 0.225 which gave a sensitivity of 60% and specificity of 75%. Multivariable logistic regression identified S100B ≥ 0.23 μg/l at 24 h as an independent predictor for neurological injury (OR 4.71, 95% CI 2.59–8.57; p < 0.01) along with preoperative cerebral malperfusion (OR 4.23, 95% CI 2.03–8.84; p < 0.01) as well as an independent predictor for 30-day mortality (OR 4.57, 95% CI 1.18–11.70; p < 0.01).ConclusionsWe demonstrated that S100B, 24 h after surgery is a strong independent predictor for neurological injury and 30-day mortality after ATAAD repair.Trial registration: As this was a retrospective observational study it was not registered.

Delayed sternal closure for intractable bleeding after acute type A aortic dissection repair: outcomes and risk factors analyses

BackgroundPerioperative coagulopathy and intractable bleeding are severe complications in acute type A aortic dissection (ATAAD) repair surgery. Mediastinal packing with delayed sternal closure (DSC) is a commonly adapted technique to stabilize the hemorrhagic tendency. This retrospective study aims to investigate the early and late outcomes and risk factors in patients who underwent DSC procedure during ATAAD repair surgery.MethodsThis study investigated 704 consecutive patients who underwent ATAAD repair at this institution between January 2007 and September 2020. These patients were dichotomized into the DSC (n = 109; 15.5%) and primary sternal closure (PSC) groups (n = 595; 84.5%). The clinical features, surgical information, postoperative complications, 5-years cumulative survival, and freedom from reoperation rates were compared. A multivariate logistic regression analysis was used to identify the independent risk factors for patients who underwent DSC.ResultsThe DSC group showed a higher rate of hemopericardium and preoperative malperfusion, and was associated with longer cardiopulmonary bypass and aortic clamping times and a higher rate of intraoperative extracorporeal membrane oxygenation (ECMO) support. The DSC group showed higher blood transfusion volumes and rate of reexploration for bleeding after surgery. However, the in-hospital mortality rates (17.4% vs. 13.3%; P = 0.249), 5-year survival rates (66.9% vs. 68.2%; P = 0.635), and freedom from reoperation rates (89.1% vs. 82.5%; P = 0.344) were comparable between the DSC and PSC groups. Multivariate analysis revealed that hemopericardium, preoperative malperfusion, and intraoperative ECMO support were risk factors for implementing DSC.ConclusionsDSC is an efficient life-saving technique to stabilize patients with intractable bleeding after undergoing ATAAD repair surgery, which leads to acceptable short- and long-term outcomes. Patients who were at risk for intractable bleeding should have early decision-making for implementing DSC.

Postoperative Stroke After Type A Aortic Dissection Repair: Hemorrhage Versus Ischemia.

Postoperative stroke is a severe and potentially disabling complication following surgical intervention for acute type A aortic dissection (ATAAD). This retrospective study aims to compare the early and late outcomes between patients who had hemorrhagic and ischemic stroke after undergoing ATAAD repair surgery. Between January 2007 and June 2020, a total of 685 consecutive patients underwent ATAAD repair at our institution. Patients who had a preoperative stroke or were unconscious at presentation were excluded from this study. Of the 656 included for analysis, 102 (15.5%) patients had a postoperative stroke confirmed by computed tomography angiography. The strokes were classified into the ischemia group (n = 83, 12.7%) and hemorrhage group (n = 19, 2.9%). Clinical features, surgical information, postoperative complications, modified Rankin Scale (mRS) scores after discharge, and 5-year cumulative survival rates were compared. Demographics, comorbidities, and presentations of ATAAD were similar between the two groups, except a higher rate of preoperative antithrombotic medication was found in the hemorrhage group. The hemorrhage group was associated with a higher complexity of aortic arch replacement, longer cardiopulmonary bypass, and aortic clamping times than the ischemia group. A higher in-hospital mortality rate (42.1% versus 20.5%; p = 0.048) and a higher median mRS score at the 3-month follow-up after discharge (6[3-6] versus 4[2-6]; p = 0.027) were found in the hemorrhage group. The hemorrhage group showed a lower 5-year cumulative survival rate (23.4% versus 57.8%; p = 0.003) compared with the ischemia group. Postoperative hemorrhagic stroke was associated with poorer neurological outcomes and lower survival rates than those with ischemic stroke. Patients who have complex arch replacement, long cardiopulmonary bypass and aortic clamping times are at risk for postoperative hemorrhagic stroke and should have intensive neurological surveillance for early diagnosis and treatment after ATAAD repair surgery.

Surveillance Imaging Following Acute Type A Aortic Dissection

BackgroundSurvivors of acute type A aortic dissection (ATAAD) repair remain at risk for long-term complications. Guidelines recommend postoperative imaging surveillance, but adherence is uncertain. ObjectivesThe aim of this study was to define the real-world frequency of postoperative imaging and characterize long-term outcomes of ATAAD. MethodsPopulation-based administrative health databases for Ontario, Canada, were linked to identify patients who underwent ATAAD repair and survived at least 90 days. Guideline-directed imaging surveillance (GDIS) was defined as undergoing a computed tomographic or magnetic resonance imaging scan at 6 and 12 months postoperatively and then annually thereafter. Multivariable time-to-event analysis explored the associations between GDIS and all-cause mortality and reintervention. ResultsA total of 888 patients who survived urgent ATAAD repair between April 1, 2005, and March 31, 2018, were included. Median follow-up after ATAAD repair was 5.2 years (interquartile range: 2.4-7.9 years). A total of 14% patients received GDIS throughout follow-up. At 6 years, 3.9% of patients had received GDIS. The mortality rate was 4% at 1 year, 14% at 5 years, and 29% at 10 years. Incidence of aortic reintervention was 3% at 1 year, 9% at 5 years, and 17% at 10 years; the majority of these were urgent (68%), and they carried a 9% 30-day mortality rate. Greater adherence to GDIS was associated with mortality (hazard ratio: 1.08; 95% confidence interval: 1.05-1.11) and reintervention (hazard ratio: 1.04; 95% confidence interval: 1.01-1.07). ConclusionsAdherence to GDIS following ATAAD repair is poor, while long-term mortality and reinterventions remain substantial. Further research is needed to determine if guidelines should be modified.

IMAGING SURVEILLANCE FOLLOWING ACUTE TYPE A AORTIC DISSECTION: A POPULATION-BASED COHORT STUDY

<h3>BACKGROUND</h3> Patients who survive repair of acute type A aortic dissection (ATAAD) remain at risk of aneurysmal degeneration and rupture of the residual native aorta. Guidelines recommend regular post-operative imaging surveillance in this population, but adherence to this recommendation and its clinical benefit are uncertain. We sought to define the real-world frequency of post-operative imaging and characterize its association with long-term outcomes. <h3>METHODS AND RESULTS</h3> Population-based administrative health databases for Ontario, Canada, were linked to identify patients who underwent ATAAD repair and survived at least 90 days. Full guideline-directed imaging surveillance (GDIS) was defined as having a CT or MRI scan at 6 and 12 months post-operatively, and then annually thereafter. Multivariable time-to-event analysis was used to explore the associations between GDIS and all-cause mortality, as well as aortic reintervention. A total of 888 patients who survived urgent ATAAD repair between April 1, 2005 and March 31, 2018 were included. Median follow-up duration after ATAAD repair was 5.2 years (IQR 2.4-7.9). A total of 14% of patients received GDIS during their entire follow-up. At 6 years, only 3.9% of patients had received GDIS. For those who survived the first 90 days, survival rate was 96% at 1 year, 86% at 5 years and 71% at 10 years. Incidence of re-intervention was 3% at 1 year, 9% at 5 years and 17% at 10 years. For every 10% increase in the proportion of time a person was undergoing GDIS, increased risks of mortality (HR 1.08, 95% CI 1.05-1.11) and reintervention (HR 1.04, 95% CI 1.01-1.07) were observed. <h3>CONCLUSION</h3> Adherence to GDIS following ATAAD repair is poor in Ontario and imaging surveillance appears to be used selectively only in those with more aggressive disease and at higher risk for poor outcomes. Further research is needed to understand if this approach is reasonable and if guidelines should be modified.

Analysis of racial disparities in acute type A aortic dissection repair at a rural tertiary academic medical center.

To determine if racial disparities exist between African Americans (AA) and Non-Hispanic Whites (NHW) for patients undergoing repair of acute type A aortic dissection (ATAAD) at a rural tertiary academic medical center. There were 215 consecutive AA and NHW patients who underwent ATAAD repair at our institution from 1999 to 2019 included in a retrospective analysis of our Society of Thoracic Surgeons Adult Cardiac Surgery Database. Statistical analysis was performed with a p value of less than .05 considered statistically significant. Patients undergoing ATAAD repair were 47% AA despite comprising only 27% of the total population in our region. AAs were significantly younger (54.0 vs. 61.2 years), were more likely to be hypertensive (94.1% vs. 79.7%), had higher creatinine levels (1.7 vs. 1.1 mg/dL), and higher body mass index (30.8 vs. 28.1 kg/m2 ) (all p values < .006). There were no significant differences in type of repair or intraoperative variables. A logistic regression analysis showed AAs had an increased rate of postoperative acute renal failure not requiring hemodialysis when compared to NHWs (20.8% vs. 10.6%, p value = .042). Thirty-day mortality was not significantly different (15.7% vs. 13.4%) nor was 1-year survival (78% vs. 79%) in AAs and NHWs, respectively. Despite AAs having more medical comorbidities at presentation, there were no differences in short- and intermediate-term survival. In our catchment of 1.8 million people, AAs appear to undergo ATAAD repair at a disproportionate rate versus NHWs. These findings may alter strategies for surveillance and prevention of aortic disease in this high-risk population.

Surgical outcomes of DeBakey type I and type II acute aortic dissection: a propensity score-matched analysis in 599 patients

BackgroundThe DeBakey classification divides Stanford acute type A aortic dissection (ATAAD) into DeBakey type I (D1) and type II (D2) according to the extent of acute aortic dissection (AAD). This retrospective study aimed to compare the early and late outcomes of D1-AAD and D2-AAD through a propensity score-matched analysis.MethodsBetween January 2009 and April 2020, 599 consecutive patients underwent ATAAD repair at our institution, and were dichotomized into D1 (n = 543; 90.7%) and D2 (n = 56; 9.3%) groups. Propensity scoring was performed with a 1:1 ratio, resulting in a matched cohort of 56 patients per group. The clinical features, postoperative complications, 5-year cumulative survival and freedom from reoperation rates were compared.ResultsIn the overall cohort, the D1 group had a lower rate of preoperative shock and more aortic arch replacement with longer cardiopulmonary bypass time. The D1 group had a higher in-hospital mortality rate than the D2 group in overall (15.8% vs 5.4%; P = 0.036) and matched cohorts (19.6% vs 5.4%; P = 0.022). For patients that survived to discharge, the D1 and D2 groups demonstrated similar 5-year survival rates in overall (77.0% vs 85.2%; P = 0.378) and matched cohorts (79.1% vs 85.2%; P = 0.425). The 5-year freedom from reoperation rates for D1 and D2 groups were 80.0% and 97.1% in overall cohort (P = 0.011), and 93.6% and 97.1% in matched cohort (P = 0.474), respectively.ConclusionsPatients with D1-AAD had a higher risk of in-hospital mortality than those with D2-AAD. However, for patients who survived to discharge, the 5-year survival rates were comparable between both groups.

Impact of socioeconomic deprivation on incidence and outcomes of acute type A aortic dissection repair in New Zealand.

Socioeconomic deprivation (SED) has been associated with increased 30-day mortality and reduced long-term survival after surgical repair of acute type A aortic dissection (ATAAD). The study aimedto determine the incidence rate ratio of ATAAD in New Zealand population with higher and lower SED indices and to evaluate any association between SED and outcomes after ATAAD repair. This was a retrospective cohort study. Patients who underwent ATAAD repair from March 2003 to May 2020 were identified. Overseas patients, those with chronic aortic dissection, and those who died in hospital before the operation were excluded. The total number of New Zealand residents was estimated based on the national 2018 Census. A total of 363 ATAAD patients met the eligibility criteria. The incidence of ATAAD was 70% greater in those who were more socioeconomically deprived (higher SED) compared with less socioeconomically deprived (lower SED) New Zealanders (odds ratio = 1.7; 95% confidence interval [CI] = 1.4-2.1; p < .0005). Postoperative cardiogenic shock, renal failure, pulmonary embolism, and respiratory failure were more common in the higher than in the lower SED group. Both groups had similar operative and in-hospital mortality and time intervals in the intensive care unit and hospital. Both groups had similar freedom from reoperation (hazards ratio [HR] = 1.1; 95% CI = 0.5-2.6; p = .746) and long-term survival (HR = 0.73; 95% CI = 0.5-1.1; p = .115). The incidence of ATAAD is greater in more socioeconomically deprived New Zealand residents. Following ATAAD repair, SED is not associated with worse short- or long-term outcomes in the universal health care system.

Impact of the Duration of Global Cardiac Ischaemia on Outcomes of Acute Type A Aortic Dissection Repair

The current management of acute type A aortic dissection (ATAD) repair does not consider the safe duration of cardiac ischaemia as an operative strategy. We aimed to evaluate whether the duration of cardiac ischaemia during ATAD repair can predict operative mortality and to determine the optimum cardiac ischaemia time that is associated with better outcomes. This was a retrospective observational study. Patients who underwent ATAD repair from 2003 to 2020 were identified from our hospital records. Three hundred and sixty three (363) ATAD patients met eligibility criteria. The median patient age was 61 years, 221 (61%) patients were male. Duration of cardiac ischaemia was associated with operative mortality (Odds ratio [OR]=1.01; p<0.0005). Its optimal cut-off point was equal to or above 149.5 minutes (95% CI: 126.2-172.8). In patients with a shorter period (less than 150 mins) of cardiac ischaemia, a valve-sparing root repair was used more often (OR=2.5; 95% CI: 1.6-3.9; p<0.001). Procedures that had the longer period of cardiac ischaemia included the Bentall procedure (OR=10.9; 95% CI: 4.9-27.4; p<0.001), descending thoracic aorta replacement (OR=4.3; 95% CI: 1.007-18.7; p=0.049) and concomitant cardiac surgery (OR=4.7; 95% CI: 2-11.1; p<0.001). Operations associated with shorter cardiac ischaemia were associated with lower in-hospital mortality and better long-term survival. This study determined that the duration of cardiac ischaemia in ATAD repair is linked to operative mortality. Further studies are required to confirm that ATAD patients with surgical repair involving less than 150 minutes of cardiac ischaemic time have lower in-hospital mortality and better long-term survival.

Antegrade and Retrograde Cerebral Perfusion During Acute Type A Aortic Dissection Repair in 290 Patients

Hypothermia and selective brain perfusion is used for brain protection during an acute type A aortic dissection (ATAAD) correction. We compared the outcomes between antegrade and retrograde cerebral perfusion techniques after ATAAD surgery. Between January 1995 and August 2017, 290 patients underwent ATAAD repair under deep hypothermic circulatory arrest/retrograde cerebral perfusion (DHCA/RCP) in 173 patients and moderate hypothermic circulatory arrest/antegrade cerebral perfusion (MHCA/ACP) in 117 patients. Outcomes of interest were: 30-day mortality, new-onset postoperative neurological complications, and length of intensive care unit (ICU) and in-hospital stays. No differences were observed between the preoperative details of both groups (p>0.05). Thirty-day (30-day) mortality did not differ between groups (RCP vs ACP, 22% vs 21.4%; p=0.90). New-onset postoperative permanent neurological dysfunctions and coma was similar in two group in 6.9% versus 10.3% of patients and 3.8% versus 6.8% patients of patients, respectively (p=0.69). The incidence of 30-day mortality and new postoperative neurological complications were similar in the RCP and ACP groups (odds ratio [OR], 1.0; 95% confidence interval [CI], 0.39-2.83 [p=0.91] and OR, 1.7; 95% CI, 0.87-3.23 [p=0.11], respectively). There was no difference between length of stay in the ICU and overall stay in hospital between the RCP and ACP groups (p=0.31 and p=0.14, respectively). No difference in survival rate was observed between the RCP and ACP groups (hazard ratio, 1.2; 95% CI, 0.76-2.01 [p=0.39]). Thirty-day (30-day) mortality rate, new-onset postoperative neurological dysfunctions, ICU stay, and in-hospital stay did not differ between the MHCA/ACP and DHCA/RCP groups after ATAAD correction. Although the rates of 30-day mortality and postoperative neurological complications were high after ATAAD repair, ACP had no advantages over the RCP technique.

A tailored strategy for repair of acute type A aortic dissection

ObjectiveInnumerable surgical techniques are currently deployed for repairing acute type A aortic dissection (ATAAD). We analyzed our results using a conservative approach of root-sparing and hemiarch techniques in higher-risk patients and root and total arch replacement for lower-risk patients. MethodsWe queried our aortic database for consecutive patients who underwent ATAAD repair. Patients who underwent conservative repair (group 1) were compared with those who underwent extensive repair (group 2) using univariable and multivariable analysis. ResultsFrom 1997 to 2019, 343 patients underwent ATAAD repair. Two hundred forty had conservative repair (root-sparing, hemiarch) whereas 103 had extensive repair (root replacement and/or total arch). Group 1 was older with more comorbidities such as hypertension, previous myocardial infarction, and renal dysfunction. Group 2 had more connective tissue disease (2.1% vs 12.6%; P < .01), aortic insufficiency, and longer intraoperative times. The incidence of individual postoperative complications was similar regardless of approach. A composite of major adverse events (operative mortality, myocardial infarction, stroke, dialysis, or tracheostomy) was higher in the conservative group (15.1% vs 5.9%; P = .03). Operative mortality was 5.6% and not different between groups. Ten-year survival was similar with either surgical approach. Ten-year cumulative risk of reintervention was greater in group 2 (5.6% vs 21% at 10 years; P < .01). In multivariable analysis, ejection fraction and diabetes were predictors of major adverse events but not extensive approach. Extensive approach was a predictor of late reoperation (odds ratio, 3.03 [95% confidence interval, 1.29-7.2]; P = .01). ConclusionsA tailored conservative approach to ATAAD leads to favorable operative outcomes without compromising durability.

Effects of Obesity on Outcomes of Acute Type A Aortic Dissection Repair in Japan.

Background: The prevalence of obesity among Japanese acute type A aortic dissection (ATAAD) patients and its effect on repair outcomes remain to be elucidated.Methods and Results: The prevalence of obesity (body mass index [BMI] ≥30.0 kg/m2) among 1,059 patients (mean [±SD] age 64.3±12.7 years) who underwent ATAAD repair between 1990 and 2018 was compared with that among the general Japanese population (National Health and Nutrition Survey data). The prevalence of obesity among male patients (17.1% [6/35], 20.0% [18/90], and 14.4% [20/139] for those aged 20–39, 40–49, and 50–59 years, respectively) was significantly higher than that among the age- and sex-matched general population. The 1,059 patients were divided into groups according to weight (normal [BMI <25.0 kg/m2; n=742], overweight [BMI 25.0–29.9 kg/m2; n=248], or obese [BMI ≥30.0 kg/m2; n=69]). Comparing the normal weight, overweight, and obese groups revealed significant differences among the 3 groups in median cardiopulmonary bypass time (143, 167, and 183 min, respectively), ventilation >48 h (44.5%, 60.1%, and 78.3%, respectively), and in-hospital mortality (7.0%, 7.3%, and 17.4%, respectively), but not in 30-day survival. Shock, visceral malperfusion, operation time >360 min, obesity, and coronary malperfusion were identified as predictors of in-hospital mortality.Conclusions: The prevalence of obesity is increased among Japanese male patients with ATAAD aged ≤59 years. Obesity may increase these patients’ operative risk; overweight does not.

Management of malperfusion: New York approach and outcomes.

Aortic branch malperfusion complicates up to one-third of acute type A aortic dissection (ATAAD), and it is a strong predictor of poor outcomes. We analyzed our results for the surgical management of this high-risk cohort. We queried our aortic database for consecutive patients undergoing ATAAD repair. Those presenting with malperfusion were compared with those without. Outcomes were compared using univariate and multivariate analysis. From 1997 to 2019, a total of336 patients underwent ATAAD repair. A total of 97 ATAAD patients presented with malperfusion. Malperfusion patients were more likely to be male (54.8% vs. 75.3%; p = .001), have had a prior myocardial infarction (11.9% vs. 26.8%; p = .001), to present with preoperative renal dysfunction (22.2% vs. 54.6%; p < .001), and to present with shock (12.6% vs. 28.9%; p = .001). The malperfusion group more often underwent coronary artery bypass grafting(5.4% vs. 24.7%; p < .001), and required additional noncardiac procedures 10.3% of the time. Operative mortality (0.8% vs. 15.5%; p < .001) and major adverse events (MAEs) (7.6% vs. 20.6%; p = .001) were both greater for the malperfusion patients. Ejection fraction, diabetes, and malperfusion were predictors of MAEs. Cerebral, coronary, mesenteric, and multiple vascular bed malperfusion were predictors of MAEs, while extremity, renal, and spinal were not. Improving outcomes for this high-risk cohort requires rapid diagnosis and reversal of ischemia while minimizing the risk of aortic rupture, irrespective of the strategic approach.

Surgical outcomes analysis in patients with uncomplicated acute type A aortic dissection: a 13-year institutional experience

This retrospective study aimed to clarify the short-term and mid-term outcomes of and prognostic factors for patients who underwent surgical repair for uncomplicated acute type A aortic dissection (ATAAD). Between January 2007 and June 2019, 603 consecutive patients underwent ATAAD repair at our institution. According to patients’ preoperative presentations and imaging studies, uncomplicated ATAAD was found in 276 (45.8%) patients by excluding preoperative complicated factors. Patients with uncomplicated ATAAD were classified into the survivor (n = 243) and non-survivor (n = 33) groups. Clinical features, surgical information, and postoperative complications were compared. Three-year survival and freedom from reoperation rates for survivors were analyzed using the Kaplan–Meier actuarial method. The in-hospital surgical mortality rate of uncomplicated ATAAD patients was 11.9%. The non-survivor group had a higher rate of postoperative malperfusion-related complications, and a multivariate analysis revealed that repeat surgery, retrograde cerebral perfusion, and intraoperative extracorporeal membrane oxygenation support were predictors of in-hospital mortality. In the survivor group, 3-year cumulative survival and freedom from aortic reoperation rates were 89.6% (95% confidence interval [CI] 84.8–92.9%) and 83.1% (95% CI 76.8–87.7%), respectively. In conclusion, uncomplicated and complicated ATAAD rates were similar; the short-term and mid-term surgical outcomes in patients with uncomplicated ATAAD were generally acceptable.

Surgical results in acute type A aortic dissection with preoperative cardiopulmonary resuscitation: Survival and neurological outcome.

BackgroundAcute type A aortic dissection (ATAAD) is a life-threatening disease that requires emergent surgical intervention. This retrospective study aimed to clarify the individual characteristics, short-term and mid-term outcomes, and prognostic factors of patients who underwent surgical repair of ATAAD with preoperative cardiopulmonary resuscitation (CPR).MethodsBetween January 2007 and January 2020, 656 consecutive patients underwent ATAAD repair at our institution; 22 (3.4%) of these patients underwent CPR prior to surgery. Patients who underwent preoperative CPR were classified as the survivor group (n = 9) and non-survivor group (n = 13), according to whether they survived to hospital discharge. Clinical features, surgical information, and postoperative complications were analyzed and compared. Three-year cumulative survival rates and cerebral performance categories (CPC) scores are presented.ResultsIn patients undergoing CPR prior to ATAAD surgery, the in-hospital mortality rate was 59.1%. A total of 72.7% of patients underwent concomitant surgical resuscitation procedures during CPR such as emergent subxiphoid pericardiotomy and/or emergent cardiopulmonary bypass. The survivor group had a higher rate of return of spontaneous heartbeat (ROSB) compared to the non-survivor group (100% versus 53.8%; P = 0.017). The 3-year cumulative survival rates were 35.1% (95% confidence interval [CI], 27.6%–42.6%) and 85.7% (95% CI, 81.9%–88.8%) for overall patients and for survivors, respectively. As for the neurological outcome, 77.8% (7/9) of patients had full cerebral performance (CPC-1) at the 3-month follow-up examination after discharge.ConclusionsPatients with ATAAD undergoing preoperative CPR, especially those without ROSB after CPR, are at high risk for in-hospital mortality. However, the short-term and mid-term outcomes, including the cerebral performance after discharge and 3-year survival rate, are promising for patients who survived to discharge.

Surgical rescues for critical hemopericardium complicated by acute type A aortic dissection: Emergent subxiphoid pericardiotomy or cardiopulmonary bypass first?

BackgroundHemopericardium is a common and hazardous complication of acute type A aortic dissection (ATAAD). This retrospective study aimed to clarify the short-term and mid-term outcomes in patients who underwent surgical rescues for hemopericardium complicated by ATAAD.MethodsBetween January 2007 and March 2019, 586 consecutive patients underwent ATAAD repair at our institution. According to preoperative computed tomography, hemopericardium was found in 191 patients (32.6%), 150 were stabilized with medical treatment, and 41 underwent surgical rescues for critical hemodynamics. The 41 patients were classified into groups according to their rescue procedures: emergent subxiphoid pericardiotomy (E-SXP group, n = 26, 63.4%) or emergent cardiopulmonary bypass (E-CPB group, n = 15, 36.6%). Clinical features, surgical information, postoperative complications, and 3-year survival were analyzed and compared.ResultsDemographics, comorbidities and aortic repair procedures were generally homogenous between the two groups, except for sex. The average systolic blood pressure was 62.4 ± 13.3 mmHg and 67.1 ± 13.1 mmHg in the E-SXP and E-CPB groups, respectively. A total of 29.3% of patients underwent cardiopulmonary resuscitation (CPR) before surgical rescues. The in-hospital mortality was similar (30.8% versus 33.3%, P = 0.865) in the two groups. Multivariate analysis revealed that preoperative CPR was an in-hospital predictor of mortality. For patients who survived to discharge, 3-year cumulative survival rates were 87.8% ± 8.1% and 60.0% ± 19.7% in the E-SXP and E-CPB groups, respectively (P = 0.170).ConclusionsPatients who underwent surgical rescues for ATAAD-complicated hemopericardium are at a high risk of in-hospital mortality. The two rescue procedures revealed similar short-term and mid-term outcomes.

Surgical outcomes of acute type A aortic dissection in patients undergoing cardiopulmonary resuscitation

ObjectivesThe surgical indications for acute type A aortic dissection (AAAD) in patients in cardiopulmonary arrest remain controversial. Outcomes of AAAD for patients who underwent cardiopulmonary resuscitation (CPR) were evaluated. MethodsBetween 2004 and 2018, of the 519 patients who underwent AAAD repair, 34 (6.6%) required CPR before or on starting AAAD repair. The patients were divided into 2 groups, survivors (n = 13) and nonsurvivors (n = 21), to compare the early operative outcomes, including mortality and neurological events. ResultsThe major cause of cardiovascular collapse requiring CPR was aortic rupture/cardiac tamponade (n = 21 [61.8%]), followed by coronary malperfusion (n = 12 [35.3%]) and acute aortic valve regurgitation (n = 3 [8.8%]). There were 3 (23.1%) patients in the survivors group and 11 (52.4%) in the nonsurvivors group who required ongoing CPR at the beginning of AAAD repair (P = .039). Of these patients, 1 survivor and 6 nonsurvivors could not achieve return of spontaneous circulation after pericardiotomy (P = .045). Although the duration from onset or arrival to the operating room was similar (P = .35 and P = .49, respectively), overall duration of CPR was shorter in survivors (10 minutes [range, 7.5-16 minutes] vs 16.5 minutes [range, 15-20 minutes]; P = .044). All survivors without any neurological deficits showed return of spontaneous circulation after pericardiotomy. Multivariate regression modeling showed that CPR duration >15 minutes was a significant risk factor for in-hospital mortality (P = .0040). ConclusionsCPR duration beyond 15 minutes may be a contraindication for AAAD repair. Moreover, we should reconsider surgery for patients who cannot achieve return of spontaneous circulation after pericardiotomy.

The Strongest Risk Factor for Operative Mortality in Acute Type A Aortic Dissection is Acidosis: Validation of Risk Model

Multiple risk factors for operative mortality in the setting of acute type A aortic dissection (ATAAD) have been described. Recently, the combination of severe acidosis and malperfusion was found to significantly impact operative mortality following surgery for ATAAD and a treatment algorithm was proposed. The purpose of this study is to validate these findings in our institution. A retrospective chart review was performed for patients who underwent ATAAD repair between Feb 1997 and Jan 2018. Preoperative nadir pH, bicarbonate, base deficit, organ malperfusion, and other relevant parameters were collected. Multivariable logistic regression was performed to evaluate operative mortality. A total of 298 patients underwent ATAAD repair. The highest operative mortality (18/49; 37%) was noted in patients with severe acidosis (base deficit ≤ -10). There were 96 patients (32%) with malperfusion. In patients with abdominal malperfusion, this trend is even more pronounced. Multivariable logistic regression showed that severe acidosis is associated with higher operative mortality, odds ratio of 13.9 (P = 0.001). The presence of diabetes and advanced age were also associated with higher operative mortality. These findings validate the previously reported findings that severe acidosis is a strong predictor of operative mortality, and risk increases with associated organ malperfusion. This supports the suggestion that base deficit, which is easily performed at the bedside, should be used clinically to predict operative mortality and should be collected in aortic dissection databases.