Online Table 1. Major scientific articles and clinical findings derived from the IRAD database. First author, year of publication Manuscript Title Journal Hagan et al., 2000[1] The International Registry of Aortic Dissection (IRAD): New insights into an old disease JAMA Mehta et al., 2002[2] Predicting death in patients with acute type A aortic dissection Januzzi et al., 2002[3] Iatrogenic aortic dissection The American Journal of Cardiology Described the specifics of iatrogenic aortic dissection: atypical presentation and high mortality, especially for Type B dissection. Moore et al., 2002[4] Choice of computed tomography, transesophageal echocardiography, magnetic resonance imaging, and aortography in acute aortic dissection: International Registry of Acute Aortic Dissection (IRAD) The American Journal of Cardiology Demonstrated high sensitivity for all four imaging techniques: CT, MRI, TEE, and angiography. Bossone et al., 2002[5] Usefulness of pulse deficit to predict in-hospital complications and mortality in patients with acute type A aortic dissection The American Journal of Cardiology Showed the effectiveness of pulse deficits in the diagnosis of acute aortic dissection. Nallamothu et al., 2002[6] Syncope in acute aortic dissection: diagnostic, prognostic, and clinical implications The American Journal of Medicine Identified cardiac tamponade and stroke as significant predictors of mortality in patients with aortic dissection presenting with syncope. Mehta et al., 2002[7] Acute type A aortic dissection in the elderly: clinical characteristics, management and outcomes in the current era Journal of the American College of Cardiology Demonstrated the differences in the clinical characteristics, management, and hospital outcomes of aortic dissection in the elderly. Mehta et al., 2002[8] Chronobiological patterns of acute aortic dissection Circulation Described circadian and seasonal variations in incidence. Suzuki et al., 2003[9] Clinical profiles and outcomes of acute type B aortic dissection– lessons from the International Registry of Aortic Dissection (IRAD) Circulation Established variables associated with increased risk of inhospital mortality among Type B dissection patients to aid early risk stratification and decision-making. Januzzi et al., 2004[10] Characterizing the young patient with aortic dissection: results from the International Registry of Aortic Dissection (IRAD) Circulation Journal of the American College of Cardiology Major Findings Described manifestations of acute aortic dissection. Developed a simple risk prediction tool. Identified the importance of Marfan’s disease, bicuspid aortic valve, and aortic enlargement in young patients. 1 First author, year of publication Manuscript Title Journal Major Findings Mehta et al., 2004[11] Acute type B aortic dissection in elderly patients: clinical features, outcomes and simple risk stratification rule The Annals of Thoracic Surgery Provided a simple decision rule to stratify risk of inhospital death in elderly patients with Type B acute aortic dissection. Nienaber et al., 2004[12] Gender-related differences in acute aortic dissection Circulation Described the different clinical features and outcomes in women with acute aortic dissection. Januzzi et al., 2004[13] Comparison of aortic dissection in patients with and without Marfan's syndrome (results from the International Registry of Aortic Dissection) The American Journal of Cardiology Park et al., 2004[14] Association of painless acute aortic dissection with increased mortality Mayo Clinic Proceedings Demonstrated that aortic dissection can present without the typical pain and that outcomes in these patients are less favorable. Collins et al., 2004[15] Differences in clinical presentation, management and outcomes of acute type A aortic dissection in patients with and without prior cardiac surgery Circulation Identified the specifics of aortic dissection in patients with previous cardiac surgery and showed that, with the exception of aortic valve replacement, prior cardiac surgery does not adversely influence early outcomes of treatment. Beckman et al., 2004[16] Branch vessel complications are increased in aortic dissection patients with renal insufficiency Vascular Medicine Demonstrated that routine measurement of serum creatinine provides a readily accessible clinical marker for complications of aortic dissection. Trimarchi et al., 2005[17] Contemporary results of surgery in acute type A aortic dissection: the International Registry of Acute Aortic Dissection experience The Journal of Thoracic and Cardiovascular Surgery Enumerated the independent preoperative predictors of operative mortality in patients undergoing surgery for Type A aortic dissection. Tsai et al., 2005[18] Clinical characteristics of hypotension in patients with acute aortic dissection The American Journal of Cardiology Confirmed that hypotension is a common and highly lethal complication of acute aortic dissection. Evangelista et al., 2005[19] Acute intramural hematoma of the aorta: a mystery in evolution Circulation Established the prevalence of IMH among patients with aortic dissection and identified IMH of ascending aorta to be highly lethal. Upchurch et al., 2005[20] Acute aortic dissection presenting with primarily abdominal pain: a rare manifestation of a deadly disease Annals of Vascular Surgery Described the differences and similarities of aortic dissection in patients with and without Marfan’s syndrome. Documented increased mortality in patients with acute aortic dissection who present primarily with abdominal pain. 2 First author, year of publication Manuscript Title Journal Major Findings Showed that the highest incidence of acute aortic dissection occurs in the morning time and in the winter season. Mehta et al., 2005[21] Does circadian and seasonal variation in occurrence of acute aortic dissection influence in-hospital outcomes? Chronobiology International Januzzi et al., 2005[22] Acute aortic dissection presenting with congestive heart failure: results from the International Registry of Acute Aortic Dissection Journal of the American College of Cardiology Described the specifics congestive heart failure as a potential complication of aortic dissection. Mukherjee et al., 2005[23] Implications of periaortic hematoma in patients with acute aortic dissection (from the International Registry of Acute Aortic Dissection) The American Journal of Cardiology Demonstrated the importance of early identification and aggressive management of patients with periaortic hematomas for improving clinical outcomes. Trimarchi et al., 2006[24] Role and results of surgery in acute type B aortic dissection: insights from the International Registry of Acute Aortic Dissection (IRAD) Circulation Showed that in Type B dissection patients requiring surgery, use of an open procedure and reduced circulatory arrest time are correlated with better surgical outcomes. Henke et al., 2006[25] Acute limb ischemia associated with type B aortic dissection: clinical relevance and therapy Surgery Demonstrated that acute limb ischemia secondary to aortic dissection is predictive of death and visceral ischemia. Tsai et al., 2006[26] Long-term survival in patients presenting with type A acute aortic dissection: insights from the International Registry of Acute Aortic Dissection (IRAD) Circulation Presented excellent long-term survival in patients with Type A aortic dissection treated surgically. Tsai et al., 2006[27] Long-term survival in patients presenting with type B acute aortic dissection: insights from the International Registry of Acute Aortic Dissection (IRAD) Circulation Determined that among Type B dissection survivors the mortality is high in contemporary follow-up. Rampoldi et al., 2007[28] Simple risk models to predict surgical mortality in acute type A aortic dissection: the International Registry of Acute Aortic Dissection score The Annals of Thoracic Surgery Devised risk assessment models (predictive scores) for predicting in-hospital mortality using a multivariable risk prediction tool. Acute type B aortic dissection: does aortic arch involvement affect management and outcomes? Insights from the International Registry of Acute Aortic Dissection (IRAD) Circulation Demonstrated that acute Type B aortic dissection with and without arch involvement does not differ with regards to 3-year mortality. Prognostic role of transesophageal echocardiography in acute type A aortic dissection. The American Heart Journal Tsai et al., 2007 [29] Bossone et al., 2007[30] Studied the prognostic value of transesophageal echocardiography in medically and surgically treated patients with acute aortic dissection. 3 First author, year of publication Manuscript Title Tsai et al., 2007[31] Partial thrombosis of the false lumen in patients with acute type B aortic dissection Pape et al., 2007[32] Aortic diameter >or = 5.5 cm is not a good predictor of type A aortic dissection: observations from the International Registry of Acute Aortic Dissection (IRAD) Trimarchi et al., 2007[33] Acute abdominal aortic dissection: insight from the International Registry of Acute Aortic Dissection (IRAD). Fattori et al., 2008 Complicated acute type B dissection: is surgery still the best option?: a report from the International Registry of Acute Aortic Dissection [34] Journal Major Findings The New England Journal of Medicine Established partial thrombosis as a predictor of poor postdischarge prognosis. Circulation Demonstrated that many dissections occur before accepted size criteria are achieved. Journal of Vascular Surgery Described the characteristics of isolated abdominal aortic dissection and recommended aggressive surgical or endovascular management of such patients. JACC: Cardiovascular Interventions Showed that within the IRAD patient cohort endovascular treatment seems to provide better in-hospital survival in patients with a complicated course of acute type B dissection (compared to open surgery). Comparing patients from North America and Europe, showed that in North Americans Type A aortic dissection occurred at smaller aortic diameters and there was a substantial delay in presentation and diagnosis. Raghupathy et al., 2008[35] Geographic differences in clinical presentation, treatment, and outcomes in type A acute aortic dissection (from the International Registry of Acute Aortic Dissection) The American Journal of Cardiology Suzuki et al., 2008[36] Preliminary experience with the smooth muscle Troponin-like protein, Calponin, as a novel biomarker for diagnosing acute aortic dissection European Heart Journal Determined the role of calponin as a potential biomarker of for early diagnosis of aortic dissection Gilon et al., 2009[37] Characteristics and in-hospital outcomes of patients with cardiac tamponade complicating type A acute aortic dissection The American Journal of Cardiology Described the outcomes of Type A aortic dissection complicated by cardiac tamponade, which significantly worsened survival of these patients. Suzuki et al., 2009[38] Diagnosis of acute aortic dissection by D-dimer: the International Registry of Acute Aortic Dissection Substudy on Biomarkers (IRAD-Bio) experience Circulation Demonstrated the high sensitivity of D-dimer elevation in detecting aortic dissection. The Journal of Thoracic and Cardiovascular Surgery Showed that surgical management decreases the inhospital mortality even for octogenarians with Type A aortic dissection and should be considered in all patients with type A aortic dissection regardless of age. Trimarchi et al., 2010 [39] Trimarchi et al., 2010[40] Role of age in acute type A aortic dissection outcome: report from the International Registry of Acute Aortic Dissection (IRAD) Importance of refractory pain and hypertension in acute type B aortic dissection: insights from the International Registry of Acute Aortic Dissection (IRAD) Circulation Described the importance of refractory pain and refractory hypertension as clinical signs of aortic dissection. 4 First author, year of publication Manuscript Title Journal Booher et al., 2011[41] Ascending thoracic aorta dimension and outcomes in acute type B dissection (from the International Registry of Acute Aortic Dissection [IRAD]) The American Journal of Cardiology Ramanath et al., 2011[42] The role of preoperative coronary angiography in the setting of type A acute aortic dissection: insights from the International Registry of Acute Aortic Dissection The American Heart Journal Rogers et al., 2011[43] Sensitivity of the aortic dissection detection risk score, a novel guideline-based tool for identification of acute aortic dissection at initial presentation: results from the international registry of acute aortic dissection Trimarchi et al, 2011[44] Descending aortic diameter of 5.5 cm or greater is not an accurate predictor of acute type B aortic dissection Harris et al., 2011[45] Correlates of delayed recognition and treatment of acute type A aortic dissection: the International Registry of Acute Aortic Dissection (IRAD) Suzuki et al., 2012[46] Circulation Major Findings Demonstrated that the having a concurrent ascending aortic aneurysm and Type B aortic dissection does not predispose to increased risk of mortality. Determined that coronary angiography preoperatively for Type A dissection does not alter the in-hospital and longterm mortality. Identified a high sensitivity of set clinical features for detecting acute aortic dissection. The Journal of Thoracic and Cardiovascular Surgery Demonstrated that a significant number of patients with Type B aortic dissection present with descending aorta size less than 5.5 cm. Circulation Identified the importance of prompt diagnosis (even with atypical presentation) and referral of aortic dissection patients in order to improve treatment outcomes. Type-selective benefits of medications in treatment of acute aortic dissection (from the International Registry of Acute Aortic Dissection [IRAD]) The American Journal of Cardiology Demonstrated the benefit of β-blockers and lack of benefit of ACE-inhibitors. Trimarchi et al, 2012[47] Influence of clinical presentation on the outcome of acute B aortic dissection: evidences from IRAD The Journal of Cardiovascular Surgery Showed that uncomplicated acute Type B dissection patients are best treated with medical therapy, while in complicated cases endovascular interventions are associated with better results than open surgery. Harris et al., 2012[48] Acute aortic intramural hematoma: an analysis from the International Registry of Acute Aortic Dissection Trimarchi et al, 2012[49] Acute type B aortic dissection in the absence of aortic dilatation Jonker et al., 2012[50] Aortic expansion after acute type B aortic dissection Circulation Described the clinical presentation and outcomes of acute IMH in comparison to classic aortic dissection. Journal of Vascular Surgery Established that female patients of younger age with acute Type B aortic dissection less commonly present with aortic dilatation. The Annals of Thoracic Surgery Found that white race and a small initial aortic diameter were associated with increased aortic expansion in followup, while decreased aortic expansion was observed among women, patients with IMH, and those on calcium-channel blockers. 5 First author, year of publication Di Eusanio et al., 2013 [51] Manuscript Title Clinical presentation, management, and short-term outcome of patients with type A acute dissection complicated by mesenteric malperfusion: observations from the International Registry of Acute Aortic Dissection Journal Major Findings The Journal of Thoracic and Cardiovascular Surgery Described mesenteric malperfusion as a rare but ominous complication of acute Type A aortic dissection, carrying a high risk of hospital mortality, which is improved with surgical treatment. Devised a new and more precise classification for characterizing survival after aortic dissection via 4 distinct time periods: hyperacute (symptom onset to 24 hours), acute (2-7 days), subacute (8-30 days), and chronic (>30 days). Booher et al., 2013[52] The IRAD classification system for characterizing survival after aortic dissection The American Journal of Medicine Tolenaar et al., 2013[53] The differences and similarities between intramural hematoma of the descending aorta and acute type B dissection Journal of Vascular Surgery Jonker et al., 2013[54] The role of age in complicated acute type B aortic dissection The Annals of Thoracic Surgery Identified advanced age as having a serious impact on the management and outcomes of patients with complicated Type B aortic dissection. Bossone et al., 2013[55] Acute aortic dissection in blacks: insights from the International Registry of Acute Aortic Dissection The American Journal of Medicine Found that although there are differences in type, etiology, and presentation of aortic dissection between blacks and whites, the mortality rates are the same. Di Eusanio et al., 2013[56] Patients with type A acute aortic dissection presenting with major brain injury: should we operate on them? The Journal of Thoracic and Cardiovascular Surgery Tolenaar et al., 2013[57] Painless Type B Aortic Dissection: Insights From the International Registry of Acute Aortic Dissection AORTA Jonker et al., 2014[58] Acute type B aortic dissection complicated by visceral ischemia The Journal of Thoracic and Cardiovascular Surgery Tolenaar et al., 2014[59] Predicting in-hospital mortality in acute type B aortic dissection: evidence from International Registry of Acute Aortic Dissection Circulation Provided evidence that patients with acute IMH of the descending aorta have a slightly more benign course compared with classic Type B aortic dissection. Showed that patients with acute Type A aortic dissection presenting with brain injury demonstrate improved late survival and frequent reversal of neurologic deficits after surgical treatment. Identified a trend for increased in-hospital mortality in patients with painless acute Type B aortic dissection, which may be the result of a delay in diagnosis and management. Confirmed high mortality rates for patients with Type B aortic dissection complicated by visceral ischemia, with surgical and endovascular treatment options providing better survival than medical management. Devised a model for predicting in-hospital mortality in patients with acute type B aortic dissection. 6 First author, year of publication Di Eusanio et al., 2014 Dean et al., 2014[61] [60] Manuscript Title Journal Major Findings Root replacement surgery versus more conservative management during type A acute aortic dissection repair The Annals of Thoracic Surgery Found that root replacement surgery in patients with Type A aortic dissection does not increase hospital mortality and should be performed in young patients, patients with connective tissue diseases, and bicuspid aortic valves. 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