Renal Infarction Research Articles

Can Radiological Renal Artery Parameters Predict Acute Kidney Injury in Infective Endocarditis Surgery?—From Imaging to Outcomes

Background: Infective endocarditis (IE) poses significant challenges in cardiovascular medicine, often necessitating valvular surgery to manage severe complications. Postoperative acute kidney injury (AKI) is a notable complication affecting patient outcomes. While clinical and procedural factors have been well studied, the role of radiological renal artery parameters in AKI risk remains underexplored. Methods: This retrospective study analyzed 80 patients with IE who underwent valvular surgery from 2013 to 2021, focusing on postoperative AKI as defined by the Kidney Disease: Improving Global Outcomes (KDIGO) criteria. Radiological parameters, including renal artery calcification, renal ostial calcification, the presence of renal infarctions, and additional arteries, were assessed using preoperative computed tomography (CT). Statistical analyses included binary logistic and linear regression models, Kaplan–Meier survival curves, and Cox proportional hazard regression to explore associations between these parameters and AKI incidence, creatinine levels, and mortality. Results: Out of 80 patients, 31 (38.8%) developed AKI. No significant differences were found in baseline characteristics or radiological parameters between the AKI+ and AKI− groups. Binary logistic and linear regression analyses revealed no substantial relationship between anatomical factors and AKI risk or creatinine levels. However, Cox regression identified “additional renal artery” as a significant predictor of 1-month mortality (HR: 1.747, 95% CI: 1.024–2.979, p = 0.041) but not for 6- or 12-month mortality. Conclusions: Radiological anatomical factors, including calcifications and additional arteries, did not significantly impact AKI risk in IE patients undergoing valvular surgery. However, the presence of additional arteries was associated with increased short-term mortality. These findings suggest the need for further research to elucidate factors contributing to AKI and mortality in this context.

Renal Infarction in a Newly Diagnosed Atrial Fibrillation Patient

Renal Infarction in a Newly Diagnosed Atrial Fibrillation Patient

Renal Infarction in a Kidney With Multiple Renal Arteries

Renal Infarction in a Kidney With Multiple Renal Arteries

Renal infarction by cannabis consumption

Renal infarction is a rare cause for an acute renal failure. At the time being, there is no sufficient correlation to the consumption of cannabis described. A 40-year-old male patient presented to our emergency room because of pain in the right renal bed. The duplex ultrasound showed no ectasia, but the computed tomography confirmed a renal infraction on the right side. The further diagnostics gave no indication of a classical pathogenesis, but there was a constant consumption of cannabis documented. We decided for a conservative treatment with analgesia, diagnostic laboratory controls and anticoagulants because of the prolonged process. The complaints decreased. The correlation between thrombo-embolic events and the consumption of cannabis has to be more explored because of its recent legalization in Germany. It should be considered as a cardiovascular risk factor. Until today there are no recommendations for the anticoagulants.

Nationwide analysis of in-hospital mortality and renal infarction trends following cardiac output assist device placement from 2017 to 2020

Abstract Background Cardiac output assist devices (COAD) have become a crucial therapeutic option for advanced heart failure patients. However, the clinical outcomes and complications associated with cardiac output device placement, especially in relation to renal health, remain a subject of concern. Purpose We aimed to examine temporal trends of in-hospital mortality and renal infarct (RI) among heart failure in patients who underwent placement of cardiac output assist devices, including intra-aortic balloon pumps and impeller-based devices, between 2017 and 2020. Methods The National Inpatient Sample was queried from 2017 to 2020 to identify all adults who underwent COAD using the International Classification of Diseases 10th Revision codes. The Cochran-Armitage test was used to assess the linear trend of in-hospital RI among patients with COAD. Multivariate and univariate regression analysis was conducted to assess the yearly association of COAD with in-hospital mortality and RI with COAD. The Elixhauser comorbidity index was used to adjust for confounders. Linear logistic results are represented as adjusted odds ratios (ORs) with their respective 95% Confidence Intervals (CI). Results Of the 176,225 patients who underwent COAD, 385 (0.2%) experienced RI, predominantly male (72%) with a mean age of 58. Trend analysis showed an upward trend in RI (trend: 0.21%, p < 0.001) associated with COAD from 2017 to 2020. In 2018, 0.19% of patients had RI (OR = 3, 95% CI 2.1-6.1, p < 0.001), 0.23% in 2019 (OR = 4.6, 95% CI 2.5-7, p < 0.001), and 0.29% in 2020 (OR = 3.6, 95% CI 2.3-5.9, p < 0.001), compared to 0.17% in 2017 (OR = 2.3, 95% CI 1.1-4.7) demonstrated in Figure 1. Mortality among RI and COAD patients was 40% in 2017 (OR 3, 95% CI 1.2-8.9, p = 0.04), decreased to 24% in 2018 (OR 1.2, p = 0.69), but increased to 43% in 2019 (OR 3.2, 95% CI 1.2-7.9, p = 0.01) and remained high at 42% in 2020 (OR 2.9, 95% CI 1.3-6.9, p = 0.019) as illustrated in Table 1. Overall, in-hospital mortality was 38% (OR 2.5, 95% CI 1.5-4, p < 0.001). Conclusions Our study identified a rising trend in in-hospital RI rates among patients with cardiac output assist devices from 2017 to 2020, accompanied by a significant risk of in-hospital mortality. Despite these complications occurring in a small percentage of individuals, they highlight the critical need for vigilant monitoring and proactive management in this patient population.Figure 1

A Case Report on Paradoxical Emboli

Venous Thromboembolism (VTE) is a major public health concern, affecting approximately 900,000 people annually in the United States. In rare cases, a Patent Foramen Ovale (PFO) may allow a venous thrombus to cross into the arterial circulation, causing a paradoxical embolism. This case report presents a 46-year-old male who developed left renal artery stenosis after a paradoxical embolism, likely triggered by a prolonged flight and binge alcohol consumption. The patient was found to have a moderate-sized PFO and renal infarction, confirmed by imaging studies. Despite initial anticoagulation therapy and a planned stenting procedure, intraoperative findings revealed only mild stenosis, leading to cancellation of the stent placement. The patient ultimately underwent PFO closure with an Amplatzer Talisman device. This case underscores the diagnostic challenges in managing paradoxical embolism and the need for individualized treatment, particularly concerning anticoagulation duration, the decision for PFO closure, and post-procedural antithrombotic therapy. Further research is required to establish optimal management strategies for cryptogenic embolic events.

Hemoperitoneum Due to Dissection and Rupture of the Superior Mesenteric Artery in a Patient With COL3A1 Mutation.

Introduction: Vascular Ehlers-Danlos syndrome (vEDS) is an autosomal dominant disorder that results from mutations in the collagen type III gene. It is a risk factor for medium-sized artery aneurysms, dissections, and ruptures. We report a case of hemoperitoneum due to medial dissection and rupture of the superior mesenteric artery related to vEDS. Methods: A full body CT scan and full three cavity autopsy was performed in a 47-year-old man with a history of an intermittent abdominal cramping for one week rand complex past medical history that included a sigmoid bowel perforation at age 20, and previous popliteal artery pseudoaneurysm rupture. Histology and genetic testing were performed. Results: The postmortem computed tomography and autopsy showed a significant hemoperitoneum due to a ruptured dissection of the superior mesenteric artery and branches, and multiple splanchnic artery dissections with renal and small bowel infarctions. Genetic testing revealed a heterozygous COL3A1 gene variant associated with Ehlers-Danlos syndrome. Death was attributed to hemoperitoneum due to medial dissection and rupture of the superior mesenteric artery due to arteriopathy. Discussion: The relatively young age and medical history correlate with the autopsy findings and genetic testing towards the conclusion of an arteriopathy consistent with vEDS.

Rare Presentation of Renal Infarction Due to Protein S Deficiency

Rare Presentation of Renal Infarction Due to Protein S Deficiency

Biatrial Thrombi on a Gore Septal Occluder Despite Early Epithelialization.

ASD and PFO device-related thrombus is an uncommon phenomenon that can be seen both early- and late-post-closure. Typical risk factors include atrial fibrillation, hypercoagulable diseases/states, and lack of device endothelialization. We present an interesting case of a 15-year-old female who underwent PFO device closure after a renal infarction and was found to have biatrial device thrombus 3-month post-closure. She initially was managed with anticoagulation and antiplatelet therapy with intermittent systemic tPA but subsequently developed a new left atrial thrombus after complete resolution. Her device was surgically removed and found to be fully endothelialized. Her case highlights the lack of current guidelines for ASD/PFO device-related thrombus.

Acute Renal Infarction: A 12-Year Retrospective Analysis

Introduction: Acute renal infarction (ARI) is a relatively rare and underdiagnosed condition. Presenting symptoms are nonspecific, and imaging is the mainstay for diagnosis. This study attempts to characterize the profile of patients with ARI and identify possible risk factors. Methods: All inpatients admitted with diagnosis of ARI between 2010 and 2022 were included in this single-center retrospective observational study. Patients with chronic renal infarction, iatrogenic causes, and without radiographic evidence of ARI were excluded. Clinical, laboratory, and radiological findings of patients were collected. Patients were grouped into three groups based on probable etiology: cardiovascular, hypercoagulable disorders, and idiopathic, and analyzed. Results: Eighty-five patients were included. Mean age of patients was 61.6 ± 17.54 years. Cardiovascular group had the highest number of patients (49.4%) of which atrial fibrillation was the most common etiology (59.5%). Malignancy was the most common etiology in the hypercoagulable disorder group (69.3%). Patients in the idiopathic group were significantly younger and had higher mean body mass index than the other 2 groups at presentation. Smokers had 9 times higher risk of renal infarction in cardiovascular group and 1.7 times higher risk in hypercoagulable when compared to the idiopathic group. 48.2% of patients developed renal infarction though they were on antiplatelets/anticoagulants. Conclusion: ARI is a rare and often underdiagnosed condition that can have residual renal dysfunction. It is important to consider ARI as a differential especially in young patients with risk factors even if they are on anticoagulation medication.

Spontaneous Renal Artery Dissection in Active Duty Male.

Spontaneous renal artery dissection is a rare condition with nonspecific symptoms that can be challenging to diagnose. We present the case of a 25-year-old male presenting with left flank pain, mild leukocytosis, and a benign urinalysis found to have renal artery dissection on computed tomography angiogram. The patient's condition improved following conservative management with anticoagulants. This case demonstrates that Spontaneous renal artery dissection may be a potential cause of renal artery infarction in young, previously healthy patients.

The Implications of Acute Anatomic Injury After Percutaneous Renal Intervention.

Percutaneous renal artery revascularization for hypertension and renal dysfunction remains common. The frequency, cause, and outcomes of anatomic injury associated with renal intervention are poorly delineated. This study aims to determine the frequency of acute anatomic renal injury after renal artery interventions, identify factors associated with anatomic renal injury, and determine whether anatomic renal injury related to renal intervention is associated with late adverse clinical events. A retrospective analysis of patients undergoing renal artery interventions for atherosclerotic renal artery disease between 2002 and 2022 was performed. Acute anatomic renal injury encompassed renal artery dissection, renal artery perforation, acute occlusion, renal parenchymal infarction, and renal parenchymal perforation. Freedom from renal-related morbidity (increase in persistent creatinine >20% of baseline, progression to hemodialysis, death from renal-related causes) and patient survival were measured. A total of 968 patients underwent 1309 renal artery interventions: 47% for hypertension, 25% for hypertension associated with chronic renal dysfunction, and 28% for chronic renal dysfunction. An acute anatomic renal injury occurred in 5.9% of the patients. The occurrence of an anatomic injury was associated with a significant decrement in freedom from renal-related morbidity (79±2% vs 55±8%, no-injury vs injury group, mean±standard error of the mean; p=0.003) and markedly decreased survival at 5 year follow-up (78±3% vs 48±8%; p=0.002). No factor was identified that predicted anatomic injury. In those patients with anatomic injury, perforation was associated with decreased survival, while estimated glomerular filtration rate <60, resistive index >0.8, and dissection were associated with a lack of retained renal benefit. Acute anatomic renal injury occurs in approximately 6% of patients undergoing percutaneous renal artery intervention and is a negative predictor of survival and is associated with subsequent renal failure, need for dialysis, and death from renal-related causes. Acute anatomic renal injury occurs in approximately 5% of patients undergoing percutaneous renal artery intervention. Modern endovascular interventions allow for the control and remediation of injuries in the majority of cases with an overall low mortality and morbidity. There is a significant early occlusion of renal arteries following the injury within 1 month. In the long term, the occurrence of injury is a negative predictor of survival and is associated with subsequent renal failure, the need for dialysis, and death from renal-related causes.

Eosinophilic Granulomatosis With Polyangiitis Triggered by an Arthropod Bite and Complicated by Renal and Hepatic Infarction and Pulmonary Embolism: A Case Report.

Eosinophilic Granulomatosis With Polyangiitis Triggered by an Arthropod Bite and Complicated by Renal and Hepatic Infarction and Pulmonary Embolism: A Case Report.

Tripterygium drug-loaded liposome alleviates renal function by promoting vascularization and inhibiting fibrosis.

Introduction: Tripterygium species have been traditionally used in Chinese medicine for treating various conditions. The aim of the study was to construct a drug-modified renal infarction targeting liposome (rTor-LIP) containing Tripterygium in order to improve the therapeutic effect on renal injury. Methods: rTor-LIP was prepared using the extruder method containing Tripterygium solution. The preparation was characterized by transmission electron microscopy, Marvin laser particle size analyzer, and Western blotting. In vitro experiments were conducted to verify the biocompatibility of rTor-LIP, and in vivo experiments were conducted to verify the therapeutic effect of rTor- LIP on renal injury. Results and discussion: The surface of rTor-LIP was regular and oval. In vitro results showed that after co-incubation with rTor-LIP, endothelial cells did not show significant apoptosis, and there were no significant abnormalities in the mitochondrial metabolism. The in vivo results showed that the morphology of endothelial cells in the rTor-LIP group was uniform and the cytoplasmic striations were clear, but the local striations had disappeared. Thus, rTor-LIP nano-targeted liposomes can effectively target hypoxic kidney tissue, providing a new idea for the treatment of renal infarction.

Case Report: Intracranial Hemorrhage as Initial Manifestation of Metastatic Trophoblastic Disease

Background: Gestational trophoblastic disease is a heterogeneous group of epithelial tumors that arise in placental trophoblastic tissue following abnormal fertilization and are related to a pregnancy event (miscarriage, extrauterine or term/preterm pregnancy). Choriocarcinoma is the most aggressive histologic type, as it shows early vascular invasion and blood metastases. It can manifest itself through hemorrhages originating in the most frequent metastatic foci of choriocarcinoma, which are usually the lung (80%), vagina (30%), brain and liver (10%). Clinical Case: 22-year-old female patient, who presented to the emergency department secondary to neurological deterioration with initial evaluation Glasgow 3 points, with presentation of Fisher IV subarachnoid hemorrhage, which merited neurosurgical treatment (decompressive craniectomy), with diagnosis of choriocarcinoma, with result of chorionic gonadotropin beta fraction 91114 mIU/ml, uterine choriocarcinoma in posterior wall of uterus, metastasis to lung and splenic and right renal infarction. Conclusion: Choriocarcinoma is a highly aggressive trophoblast pathology, due to its great capacity for angioinvasion, which facilitates its dissemination and favours the development of pulmonary, cerebral, hepatic and other organ metastases. This increases mortality, since diagnosis and treatment is usually not carried out early, or is incomplete.

Endoscopic diagnosis of an obstructive fungal ball in the urethra of a dog

AbstractA 1‐year‐old, male, neutered German shepherd dog was presented for a chronic atraumatic non‐healing fracture of the right accessory carpal bone, stranguria and polyuria/polydipsia. Biochemistry and urinalysis showed azotaemia. Ultrasound and computed tomography of the abdomen both demonstrated bilateral renal infarcts with pyelectasia, bilateral ureteral dilation and bladder distension. Cystoscopy of the bladder identified a fungal ball obstructing the pelvic urethral sphincter, which was adhered to the bladder mucosa in the region of the ureterovesicular junction. The obstruction was traversed endoscopically, but could not be removed transurethrally. The combination of elevated serum galactomannan titres (6.4) and Aspergillus terreus cultured from urine, confirmed a diagnosis of disseminated aspergillosis. The dog was euthanased due to poor quality of life, guarded prognosis and lengthy timeframe before an expected medical response. This is the first case report describing Aspergillus fungal balls in a dog causing partial urethral and bilateral ureteral obstruction, identified using cystoscopy.

Factor V Leiden Heterozygous Mutation and Hyperhomocysteinemia Presenting with Vascular Rejection and Renal Allograft Infarction

Factor V Leiden Heterozygous Mutation and Hyperhomocysteinemia Presenting with Vascular Rejection and Renal Allograft Infarction

A Case of Acute Renal Infarct Secondary to Protein S Deficiency

Renal infarction is an underdiagnosed and underreported condition with multiple etiologies. A 45-year-old man presented with acute pain in the right lumbar region, CT scan showed a wedge shaped, non-enhancing, hypodense lesion in the cortex of the upper pole of the right kidney- suggestive of infarct. A pro-thrombotic workup revealed a protein S deficiency and a heterozygous mutation for MTHFR gene. Protein S is a vitamin-K dependent plasma glycoprotein, the deficiency of which is associated with a hypercoagulable state, which in turn led to renal infarction in this patient.

Non-Wilms renal tumors: Twenty years experience in a referral center

BackgroundNon-Wilms Renal Tumors (NWRT) constitute less than 10% of all renal tumors diagnosed in childhood. We studied our experience in the diagnosis and management of these tumors to compare our results with the current literature. Study designThis is a retrospective observational study which includes all patients aged 0-18 years with histopathological diagnosis of NWRT treated in our center during the period 2000-2022. ResultsWe identified 10 patients with diagnosis of: cystic nephroma(3), congenital mesoblastic nephroma(1), renal cell carcinoma(2), clear cell sarcoma of the kidney (2), renal Ewing's sarcoma(1) and malignant rhabdoid tumor of the kidney(1). Sixty percent (60%) were female. The median age at diagnosis was 3.25 years (IQR 1.5-10). Median age at diagnosis excluding CN was 6 years old (IQR 2.62-10.75). Molecular alterations were detected in 60% of the cases. Hematuria (40%) and palpable abdominal mass (40%) were the most frequent presenting symptoms. In total, 62.5% patients were misdiagnosed during the preoperative period as Wilms' tumor (WT), based on imaging data. A Radical nephroureterectomy was performed in all cases and staging lymphadenectomy in 70%. We recorded a major complication in one patient, who suffered a contralateral lower renal pole infarction due to section of a polar vessel during surgery. This patient had no preoperative vascular study. The recurrence-free survival rate was 90% with a median follow-up of 6.4 years (IQR 2-13.9). DiscussionRadiological imaging has fundamental importance in the diagnosis of renal tumors, especially to identify children who might benefit from initial surgical treatment or the indication of biopsy for preoperative histopathological confirmation before initiating cytotoxic treatment. However, there are no pathognomonic imaging findings that clearly differentiate between WT and other renal tumors, nor among the heterogeneous group of NWRT[3]. In our series, 62.5% of patients were misdiagnosed as WT based on imaging features.We found different molecular alterations in 60% of our patients (Table 1). None of them predispose to the development of bilateral tumors nor correlates with predisposing syndromes of metachronous tumors.Apart from its retrospective design, this study is limited by small number of cases and a long study period. ConclusionsCorrect differential diagnosis of NWRT is necessary for an adequate therapeutic approach. The molecular-genetic profile is an important step in the diagnosis of NWRT that allows for the use of targeted therapies in refractory patients. Detailed anatomical study by vascular mapping minimizes the risk of iatrogenic damage during tumor resection.

Fibromuscular Dysplasia: Renal Artery Dissection and Infarction in a Young Male

Fibromuscular dysplasia is an abnormal cell growth of the arterial wall that usually affects the renal and carotid arteries. It may lead to stenosis, tortuosity, aneurysm, or dissection of the artery and can potentially compromise the circulation from ensuing total occlusion and infarction of the recipient area. We report a case of a young male who presented with severe acute abdominal pain in the right side of the abdomen associated with nausea, vomiting, and constipation. Computed tomography of the abdomen with intravenous contrast showed acute renal infarction of a focal area at the lower pole of the right kidney, subsequent computed angiography showed dissection of a segmental branch of the right renal artery associated with fibromuscular dysplasia and beading appearance of the right renal artery. The renal function test and urinalysis were both normal. The patient was treated with unfractionated heparin infusion, with the resolution of abdominal pain, he was subsequently discharged home uneventfully on oral aspirin.