Bilateral Renal Artery Involvement Research Articles

Renal artery involvement is associated with increased morbidity but not mortality in Takayasu arteritis: a matched cohort study of 215 patients.

We analyzed differences in presentation and survival of Takayasu arteritis (TAK) with or without renal artery involvement (RAI) from a large monocentric cohort of patients with TAK. Clinical and angiographic features were compared between TAK with versus without RAI, with bilateral versus unilateral RAI, and with bilateral RAI versus without RAI using multivariable-adjusted logistic regression. Inter-group differences in survival were analyzed [hazard ratios (HR) with 95% confidence intervals (95%CI)] adjusted for gender, age at disease onset, diagnostic delay, baseline disease activity, and significant clinical/angiographic inter-group differences after multivariable-adjustment/propensity score matching (PSM). Of 215 TAK, 117(54.42%) had RAI [66(56.41%) bilateral]. TAK with RAI or with bilateral RAI had earlier disease onset than without RAI (p < 0.001). Chronic renal failure (CRF) was exclusively seen in TAK with RAI. TAK with RAI (vs without RAI) had more frequent hypertension (p = 0.001), heart failure (p = 0.047), abdominal aorta (p = 0.001) or superior mesenteric artery involvement (p = 0.018). TAK with bilateral RAI (vs unilateral RAI) more often had hypertension (p = 0.011) and blurring of vision (p = 0.049). TAK with bilateral RAI (vs without RAI) more frequently had hypertension (p = 0.002), heart failure (p = 0.036), abdominal aorta (p < 0.001), superior mesenteric artery (p = 0.002), or left subclavian artery involvement (p = 0.041). Despite higher morbidity (hypertension, CRF), mortality risk was not increased with RAI vs without RAI (HR 2.32, 95%CI 0.61-8.78), with bilateral RAI vs unilateral RAI (HR 2.65, 95%CI 0.52-13.42) or without RAI (HR 3.16, 95%CI 0.79-12.70) even after multivariable adjustment or PSM. RAI is associated with increased morbidity (CRF, hypertension, heart failure) but does not adversely affect survival in TAK. Key Points •Renal artery involvement in TAK is associated with chronic renal failure. •TAK with renal artery involvement more often have heart failure and hypertension. •Bilateral renal artery involvement (compared with unilateral) is more often associated with hypertension and visual symptoms. •Renal artery involvement is not associated with an increased risk of mortality in TAK.

Anatomic classification of renal artery involvement in patients with Stanford type A aortic dissection based on CT angiography images

Abstract Objective This study was conducted to classify the anatomy of renal artery involvement in Stanford type A aortic dissection based on CT angiography images and to explore the clinical value of this classification system. Methods Data of 1331 patients with Stanford type A aortic dissection who underwent surgery at our hospital from January 2010 to December 2017 were analyzed. According to the aortic CT plane scan, the anatomical involvement of one side of the renal artery was divided into the following five types: type T, true lumen involvement; type F, false lumen involvement; type B, both lumens involvement; type C, crushed intimal flap; and type S, sandwich model. Based on the actual CT tomographic observation statistics, bilateral renal artery involvement was classified as TT, TF, TB, BB, BF, CF, and TS types. The incidence of postoperative AKI and CRRT, as well as early postoperative mortality of patients with bilateral renal artery involvement were analyzed among the patients. Results The 1331 patients with Stanford type A aortic dissection with bilateral renal artery involvement were grouped according to their anatomic classification as follows: 575 patients had TT type; 352 patients had TF type; 198 patients had TB type; 17 patients had BB type; 30 patients had BF type; 84 patients had CF type; and 75 patients had TS type. The incidence of postoperative AKI for the TT, TF, TB, BB, BF, CF, and TS types was 14.61% (84/575), 22.44% (79/352), 36.36% (72/198), 52.94% (9/17), 40.0% (12/30), 65.48% (55/84), and 36.0% (27/75), respectively. The incidence of postoperative CRRT for the TT, TF, TB, BB, BF, CF, and TS types was 3.48% (20/575), 6.82% (24/352) ,12.12% (24/198), 17.65%(3/17) , 10.00%(3/30), 32.14 (27/84) , and 9.33% (7/75) , respectively. The early mortality rate for the TT, TF, TB, BB, BF, CF, and TS types was 4.17% (24/575), 4.26% (15/352), 11.11% (22/198), 11.76% (2/17), 13.33% (4/30) , 17.86% (15/84), and 5.33% (4/75), respectively. Analysis of the results revealed statistically significant differences in the incidence of AKI, CRRT use, and early mortality among the identified subtypes (all P values &amp;lt; 0.01). The incidence of CF type was the highest, followed by BB and BF types. Conclusions The incidence of AKI, CRRT, and early mortality was significantly different among the anatomical types of renal artery involvement in Stanford type A aortic dissection. Notably, CF type had the highest incidence followed by types BB and BF.result_1result_2

Clinical study on the classification of renal artery involvement and comparison of renal function and prognosis of Stanford type B aortic dissection after thoracic aortic endovascular repair

Objective: To investigate the different types of renal artery involvement in Stanford type B aortic dissection (TBAD) and the comparison of clinical effecacy after thoracic endovascular aortic repair (TEVAR). Methods: This is a retrospective cohort study included 330 patients with TBAD and renal artery involvement treated with TEVAR from June 2002 to September 2021 in General Hospital of Northern Theater Command of the PLA. According to aortic CTA image, unilateral renal artery involvement conditions were divided into 5 types: the true lumen type (renal artery opening completely from the true lumen), false lumen type (renal artery opening completely from the false lumen), double lumen type (renal artery opening from the true and false double lumen), compression type (renal artery opening connected with the true lumen, but the renal artery opening was extremely squeezed by the inner membrane), open type (renal artery opening with intimal tear). There were seven types of bilateral renal artery involvement: true-true type (true lumen-true lumen type), true and false type (true lumen-false lumen type), true-double type (true lumen-double lumen type), true-opening type (true lumen-opening type), false-false type (false lumen-false lumen type), false-compression type (false lumen-compression type), double-double type (double lumen-double lumen type). The primary observation index of this study was the comparison of postoperative renal function and the incidence of clinical adverse events of different types of renal artery involvement. One-way ANOVA test, Kruskal-Wallis H test and paired sample rank sum test were used to compare postoperative renal function between different types of bilateral renal artery involvement. The Chi-square test or Fisher's exact probability test were used to compare the near and long term adverse events between different types of bilateral renal artery involvement. Kaplan-Meier method was used to compare the all-cause mortality of patients with severe renal functional injury and non-severe renal functional injury before surgery. Results: The average age of the patients included in this study was (53±11) years, including 276 males (83.6%) and 54 females (16.4%). There were statistical difference in the level of serum creatinine (preoperative:H=18.686, P=0.005, postoperative:H=18.101, P=0.006) and cystatin C (preoperative:H=17.566, P=0.007, postoperative:H=10.433, P=0.016), pre-and post-operative, between the seven groups of TBAD patients with different renal artery involvement types (P<0.05), and the false-false type group shown the worst kidney function. However, no statistically significant differences were shown when comparing their pre- and post-operative change values (P>0.05). The 30-day follow-up result showed that there were statistically significant differences in the incidence of postoperative acute kidney injury (χ2=15.623, P=0.007), aorta-related adverse events (χ2=15.523, P=0.010), and intraoperative endoleak (χ2=17.935, P=0.004) among the seven groups, and the false-false group was the highest (2/9, 5/9 and 5/9, respectively). In terms of long-term follow-up results, there were statistically significant differences in all-cause death (χ2=14.772, P=0.011) and non-aortic death (χ2=15.589,P=0.008) among the seven groups. Kaplan-Meier survival analysis showed that patients with worse pre-operative renal function showed higher long-term all cause death (17.7% vs. 4.8%, P=0.009). Conclusions: For TBAD patients with renal artery involvement, there were differences in renal function among different types, and TEVAR showed no significant effect on renal function in TBAD patients. The long-term all cause death was higher in patients with worse renal function pre-operative.

Percutaneous Transluminal Renal Angioplasty for Fibromuscular Dysplasia and Prognostic Risk Factors: A Retrospective Chinese Cohort Study

Fibromuscular dysplasia (FMD) is a non-atherosclerotic, non-inflammatory vascular disease involving small-to-medium-sized arteries. The characteristics of Chinese patients with FMD remain unclear. We retrospectively analyzed the data of patients with renal FMD who underwent percutaneous transluminal renal angioplasty (PTRA) for the first time at Fuwai Hospital between 2010 and 2021. The variables were selected through least absolute shrinkage and selection operator regression (LASSO), and logistic regression models were constructed to identify independent risk factors. A total of 116 patients (52 males, median age at diagnosis, 25.0 years) were enrolled. Elevated blood pressure was the leading complaint. After a median follow-up period of 18.0 months (interquartile range: 6.0-48.0 months), hypertension recurred in 34 patients and restenosis in nine patients, among whom four patients underwent secondary intervention and one patient underwent surgical revascularization. Bilateral renal artery involvement (odds ratio [OR]: 2.61, 95% confidence interval [CI]: 1.11-6.15; p = 0.028) and age at hypertension onset (OR: 0.93, 95% CI: 0.88-0.99; p = 0.018) were independent prognostic factors for adverse outcomes. The results indicate that patients with bilateral renal artery involvement and younger age at hypertension onset are more likely to have poorer clinical outcomes after PTRA, and should be more closely monitored.

Relationship Between Renal Function and Renal Artery Involvement in Acute Debakey Type I Aortic Dissection.

The aim of this study was to analyse the differences in renal function among various types of renal artery involvement in acute Debakey Type I aortic dissection. From January 2016 to January 2018, 304 consecutive patients with acute Debakey type I aortic dissection with renal artery involvement were included. According to computed tomography angiography (CTA) findings, renal artery involvement on one side can be classified into four types: type A, in which a large intimal tear is near the renal artery orifice; type B, the orifice of the renal artery originates entirely from the false lumen; type C, the orifice of the renal artery originates entirely from the true lumen; and type D, a renal artery dissection is observed. All patients underwent aortic repair. The average age was 46.98±10.64 years. The types of bilateral renal artery involvement were as follows: AB type, four patients (1.32%); AC type, 38 patients (12.50%); AD type, three patients (0.99%); BB type, 13 patients (4.28%); BC type, 140 patients (46.05%); BD type, four patients (1.32%); CC type, 76 patients (25.00%); and CD type, 26 patients (8.55%). One-way ANOVA showed that there was no significant difference in serum creatinine (P = .57) and creatinine clearance rate (P = .08) between the groups. A statistically significant difference in age, gender, body mass index, hypertension history and aortic dissection onset time also was not observed (P > .05). The overall incidence of KDIGO acute kidney injury (AKI) was 49.67%. There was no significant difference in AKI incidence between different types of renal artery involvement after aortic surgery (P = .39). For patients needing renal replacement therapy, CTA showed that enhancement of renal cortex in the arterial phase was low and the boundary between the cortex and medulla was unclear in bilateral kidneys. The types of renal artery involvement did not affect renal function in the acute phase.

Characteristics and Medium-term Outcomes of Takayasu Arteritis-related Renal Artery Stenosis: Analysis of a Large Chinese Cohort.

To investigate the characteristics of patients with Takayasu arteritis (TA)-related renal artery stenosis and identify the predictors of medium-term adverse outcomes. Data for 567 patients registered in the East China Takayasu arteritis cohort, a large prospective observational cohort, up to April 30, 2019, were retrospectively analyzed. Renal artery stenosis was confirmed in 172/567 (30.34%) patients, with left renal artery involvement seen in 73/172 (42.44%) patients. Renal insufficiency at presentation (HR 2.37, 95% CI 1.76-15.83, P = 0.03), bilateral renal artery involvement (HR 6.95, 95% CI 1.18-21.55, P = 0.01), and severe stenosis (> 75%; HR 4.75, 95% CI 1.08-11.33, P = 0.05) were predictors of adverse outcomes. A matrix model constructed using 3 variables (renal function, stenosis severity, and bilateral renal artery involvement) could identify 3 risk groups. Revascularization was performed for 46 out of 172 (26.74%) patients. Patients without preoperative treatment had higher rate of restenosis (41.46% vs 16.67%, P < 0.01) and worsening hypertension (25.93% vs. 10.53%, P < 0.01) after the procedure. Nonreceipt of preoperative treatment (HR 6.5, 95% CI 1.77-32.98, P = 0.04) and active disease at revascularization (HR 4.21, 95% CI 2.01-21.44, P = 0.04) were independent predictors of adverse outcomes after revascularization. Patients with TA-associated renal artery stenosis and uncontrolled or worsening hypertension or/and renal function may benefit from revascularization. Those who have received preoperative treatment may have more favorable revascularization outcomes. Prognosis appears to be poorer for patients with renal insufficiency at presentation, bilateral artery involvement, and severe stenosis.

Long-term outcomes of patients with Takayasu arteritis and renal artery involvement: a cohort study.

ObjectiveTo describe the long-term outcomes of patients with Takayasu arteritis (TAK) and renal artery involvement (RAI).MethodsA retrospective review of 122 patients with TAK at three tertiary centres in Canada, Sweden and the UK. Data on demographics, laboratory and clinical parameters, medications and angiography findings were collected. Non-renal and renal parameters were compared at baseline and follow-up.ResultsA total of 37 patients (30%) with RAI were identified: 18 (49%) with unilateral and 19 (51%) with bilateral RAI. Patients were predominantly female (89%). The median age at diagnosis was 27 years [interquartile range (IQR) 16–38]. The median follow-up time was 7 years (IQR 2–12). Hypertension was seen in 27 patients (73%) at presentation and 25 (68%) at follow-up. The median estimated glomerular filtration (eGFR) at presentation was 94 and 98 ml/min/1.73 m2 in those with unilateral and bilateral RAI, respectively. The corresponding median eGFR at follow-up was 101.5 and 104 ml/min/1.73 m2, respectively. Three patients at presentation and two at follow-up had an eGFR of <60 ml/min/1.73 m2. Five underwent endovascular intervention and three required surgical interventions. Among the 33 patients with radiologic follow-up, 23 (69%) had persistent RAI and 10 (30%) had resolution of RAI. One (6%) patient with unilateral RAI developed bilateral RAI and three (19%) with bilateral RAI regressed to unilateral RAI. Over time, 23 (62%) patients had stable renal function, 7 (19%) had improvement and 4 had a decline in renal function; no patient developed end-stage renal disease (ESRD).ConclusionIn this series of TAK patients with RAI, long-term non-renal and renal outcomes were favourable. No patient experienced ESRD or died.

Longterm Outcomes of Renal Artery Involvement in Takayasu Arteritis.

Takayasu arteritis (TA) involving the renal artery can result in hypertension (HTN), renal dysfunction, and premature death. The aim of this study was to investigate the longterm outcomes and factors that predict outcomes in patients with TA with renal artery stenosis. The medical records of patients diagnosed with TA between January 1997 and December 2014 were reviewed retrospectively. Renal artery involvement was based on computed tomography and/or angiography findings. Poor outcome was defined as refractory HTN, chronic renal insufficiency, or death. Of the 62 TA patients with renal artery involvement, 11 (17.7%) underwent renal artery revascularization. Younger age, male sex, and more severe stenosis (> 70%) were associated with vascular intervention. After a median followup of 90.6 months, 11 (17.7%) of the 62 patients had refractory HTN and 6 (9.7%) had chronic renal insufficiency. Renal insufficiency [5/15 (33.3%) vs 3/47 (6.4%), p = 0.016] and bilateral involvement [12/15 (80.0%) vs 23/47 (48.9%), p = 0.041] were significantly more frequent in patients with poor than good outcomes. Multivariate Cox analysis revealed that renal insufficiency at presentation (HR 13.778, 95% CI 3.530-53.786, p < 0.001) and bilateral renal artery involvement (HR 5.053, 95% CI 1.179-21.661, p = 0.029) were significant risk factors for poor outcomes at followup, but performance of revascularization procedure was not (HR 0.663, 95% CI 0.176-2.498, p = 0.543). Bilateral lesions and renal functional impairment at presentation, but not implementation of revascularization procedures, were significant factors for outcomes in TA patients with renal artery involvement.

Predictors and in-hospital outcomes of preoperative acute kidney injury in patients with type A acute aortic dissection.

BackgroundAcute kidney injury (AKI) is common after surgery for acute aortic dissection (AAD) and increases in-hospital and long-term mortality. However, few data exist on the clinical and prognostic relevance of early preoperative AKI in patients with type A AAD. We aimed to determine the incidence and predictors of preoperative AKI and the impact of AKI on in-hospital outcomes in patients with type A AAD.MethodsFrom May 2009 to June 2014, we retrospectively enrolled 178 patients admitted to our hospital within 48 h from symptom onset and receiving open surgery for type A AAD. The patients were divided into no AKI and AKI groups and staged with AKI severity according to the KDIGO criteria before surgery.ResultsAKI occurred in 41 patients (23.0%). The incidence of in-hospital complications was significantly higher in patients with preoperative AKI compared to no AKI (41.5% vs. 9.5%, P < 0.001), including renal infarction (7.3% vs. 0, P = 0.012), and it increased with AKI severity (Ptrend < 0.001). Patients with AKI had higher in-hospital mortality compared with patients without AKI, although no significant difference was found (14.6% vs. 5.1%, P = 0.079). Multivariate analysis indicated that male gender, diastolic blood pressure on admission and bilateral renal artery involvement were independent predictors of preoperative AKI in patients with type A AAD.ConclusionsEarly AKI before surgery was common in patients with type A AAD, and was associated with increased in-hospital complications. Male gender, diastolic blood pressure on admission and bilateral renal artery involvement were major predictors for preoperative AKI.

Relationship between acute kidney injury before thoracic endovascular aneurysm repair and in-hospital outcomes in patients with type B acute aortic dissection.

ObjectiveAcute kidney injury (AKI) frequently occurs after catheter-based interventional procedures and increases mortality. However, the implications of AKI before thoracic endovascular aneurysm repair (TEVAR) of type B acute aortic dissection (AAD) remain unclear. This study evaluated the incidence, predictors, and in-hospital outcomes of AKI before TEVAR in patients with type B AAD.MethodsBetween 2009 and 2013, 76 patients were retrospectively evaluated who received TEVAR for type B AAD within 36 h from symptom onset. The patients were classified into no-AKI vs. AKI groups, and the severity of AKI was further staged according to kidney disease: improving global outcomes criteria before TEVAR.ResultsThe incidence of preoperative AKI was 36.8%. In-hospital complications was significantly higher in patients with preoperative AKI compared with no-AKI (50.0% vs. 4.2%, respectively; P < 0.001), including acute renal failure (21.4% vs. 0, respectively; P < 0.001), and they increased with severity of AKI (P < 0.001). The maximum levels of body temperature and white blood cell count were significantly related to maximum serum creatinine level before TEVAR. Multivariate analysis showed that systolic blood pressure on admission (OR: 1.023; 95% CI: 1.003–1.044; P = 0.0238) and bilateral renal artery involvement (OR: 19.076; 95% CI: 1.914–190.164; P = 0.0120) were strong predictors of preoperative AKI.ConclusionsPreoperative AKI frequently occurred in patients with type B AAD, and correlated with higher in-hospital complications and enhanced inflammatory reaction. Systolic blood pressure on admission and bilateral renal artery involvement were major risk factors for AKI before TEVAR.

Middle Aortic Syndrome with Superior Mesenteric and Bilateral Renal Artery Involvement: Unusual Type of Aortic Coarctation

Middle aortic syndrome (MAS) is very uncommon vascular pathology characterized by a long segmental narrowing or obstruction of the abdominal and/or distal thoracic aorta, commonly involving with the visceral and renal arteries. This syndrome may be presented with various physical signs of coarctation of the aorta, including resistant hypertension, renal insufficiency and/or mesenteric ischemia. Here, we report a case of a 64-year-old man with severe hypertension. He was diagnosed with MAS associated with stenosis of visceral and renal vessels by use of computed tomography and magnetic resonance angiography. (J Korean Soc Hypertens 2013;19(1):39-43)

Refractory Hypertension in a Young Woman

A 36-year-old woman was referred for the evaluation of refractory arterial hypertension with vasculorenal profile. Abdominal multislice computed tomography angiography (MSCT-angiography) was performed for further evaluation. Bilateral renal artery involvement was demonstrated with aneurysms, stenotic segments, and a string-of-beads-appearance in the right renal artery. We discuss the occurrence of fibromuscular dysplasia as a cause of refractory hypertension in young women and the increasing importance of MSCT studies for its diagnosis.

Thoracoabdominal aorta coarctation with bilateral renal artery involvement: diagnosis with multidetector CT angiography (MDCTA)

Atypical coarctation of the descending thoracic and abdominal aorta is a very uncommon vascular disease. Congenital, acquired, inflammatory, and infectious etiologies have been proposed. Patients typically presents with uncontrolled secondary hypertension in the upper half of the body or hypotension in the lower extremities in the first three decades of their lives. We report the case of a 20-year-old man with severe hypertension. Diffuse coarctation of thoracoabdominal aorta associated with bilateral renal artery stenosis was demonstrated clearly by multidetector CT angiography. This is the first case of atypical aortic coarctation diagnosed by MDCTA.

Report of a case with surprising etiology of renovascular hypertension

Takayasu arteritis is a chronic, idiopathic, inflammatory disease that primarily affects large vessels, such as the aorta and its main branches. Epidemiologically, it is found mostly in female patients and is more prevalent in Asian and Latin American countries. Disease may be heterogeneous in presentation. In this report, we present a different clinical expression of Takayasu arteritis in a young man who had hypertension as the sole manifestation of multiple critical arterial involvement with elevated inflammation markers but no other symptoms. A 28-year-old man was admitted with hypertension. There was no evidence for systemic vasculitis by history, serologic studies or other laboratory data. The acute-phase reactants were elevated with an erythrocyte sedimentation rate of 55 mm/h, and a C-reactive protein value of 22 mg/dl. Digital subtraction angiography showed multiple severe stenoses or occlusions of the branches of the abdominal aorta and arcus aortae together with bilateral renal artery involvement. The etiology of renovascular hypertension was found to be Takayasu arteritis with the presence of at least three criteria, as outlined by the American College of Rheumatology in 1990. Patients with Takayasu arteritis may have atypical clinical expression of the disease, and a diagnosis of Takayasu arteritis should be kept in mind in the differential diagnosis of renovascular hypertension in young subjects, even if they do not have associated symptoms of multiple arterial involvement.

Concomitant renal revascularization in patients undergoing aortic surgery.

Sixty-three patients who underwent renal revascularization at the time of aortic surgery were retrospectively reviewed. These patients had significant renal artery stenosis in addition to either severe aortoiliac occlusive disease or aortic aneurysmal disease. Fifty-eight patients were hypertensive, whereas five patients were normotensive and these renal lesions were treated prophylactically. The operative mortality rate was 3%. Despite lack of selectivity in these patients with diffuse atherosclerosis, 60% (35 of 58) of the patients with hypertension could be classified as either "cured" or "improved." Patients with bilateral renal artery involvement and moderate azotemia were noted to improve with respect to renal function postoperatively. No patient has required chronic dialysis at a mean follow-up period of 22.6 months. Simultaneous aortic and renal artery surgery may be performed with low morbidity and mortality rates and produce a gratifying improvement in hypertension. Renal functional improvement and perhaps preservation of renal mass may be anticipated in selected patients.

Concomitant renal revascularization in patients undergoing aortic surgery

Sixty-three patients who underwent renal revascularization at the time of aortic surgery were retrospectively reviewed. These patients had significant renal artery stenosis in addition to either severe aortoiliac occlusive disease or aortic aneurysmal disease. Fifty-eight patients were hypertensive, whereas five patients were normotensive and these renal lesions were treated prophylactically. The operative mortality rate was 3%. Despite lack of selectivity in these patients with diffuse atherosclerosis, 60% (35 of 58) of the patients with hypertension could be classified as either “cured” or “improved.” Patients with bilateral renal artery involvement and moderate azotemia were noted to improve with respect to renal function postoperatively. No patient has required chronic dialysis at a mean follow-up period of 22.6 months. Simultaneous aortic and renal artery surgery may be performed with low morbidity and mortality rates and produce a gratifying improvement in hypertension. Renal functional improvement and perhaps preservation of renal mass may be anticipated in selected patients.