scholarly journals Epidemiology, risk factors, and clinical impact of early post-transplant infection in older kidney transplant recipients: the Korean organ transplantation registry study

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Jin Sug Kim ◽  
◽  
Kyung Hwan Jeong ◽  
Dong Won Lee ◽  
Sam Yeol Lee ◽  
...  
Keyword(s):  
Risk Factors ◽  
Organ Transplantation ◽  
Graft Loss ◽  
Infectious Complications ◽  
Kidney Transplant Recipients ◽  
Cardiac Events ◽  
Post Transplant ◽  
Kidney Recipients ◽  
All Cause Mortality ◽  
Older Recipients

Abstract Background As in younger recipients, post-transplant infection is a frequent and devastating complication after kidney transplantation (KT) in older recipients. However, few studies have analyzed characteristics of post-transplant infection in older kidney recipients. In this study of a nation-wide cohort of older kidney recipients, we investigated the current epidemiology, risk factors, and clinical impacts of early post-transplant infection, which was defined as infectious complications requiring hospitalization within the first 6 months after KT. Methods Three thousand seven hundred thirty-eight kidney recipients registered in the Korean Organ Transplantation Registry between 2014 and 2017 were enrolled. Recipients were divided into two groups, younger (n = 3081) and older (n = 657), with a cutoff age of 60 years. We observed characteristics of early post-transplant infection, and investigated risk factors for the development of infection. We also analyzed the association of early post-transplant infection with clinical outcomes including cardiac events, rejection, graft loss, and all-cause mortality. Results The incidence of early post-transplant infection was more frequent in older recipients (16.9% in younger group and 22.7% in older group). Bacteria were the most common causative pathogens of early post-transplant infection, and the most frequent site of infection was the urinary tract in both older and younger recipients. Older recipients experienced more mycobacterial infections, co-infections, and multiple site infections compared with younger recipients. In older recipients, female sex (HR 1.398, 95% CI 1.199–1.631), older donor age (HR 1.010, 95% CI 1.004–1.016), longer hospitalization after KT (HR 1.010, 95% CI 1.006–1.014), and experience of acute rejection (HR 2.907, 95% CI 2.471–3.419) were independent risk factors for the development of early post-transplant infection. Experiencing infection significantly increases the incidence of rejection, graft loss, and all-cause mortality. Conclusion Our results illustrate current trends, risk factors, and clinical impacts of early post-transplant infection after KT in older recipients. Considering the poor outcomes associated with early post-transplant infection, careful screening of recipients at high risk for infection and monitoring of recipients who experience infection are advised. In addition, since older recipients exhibit different clinical characteristics than younger recipients, further studies are needed to establish effective strategies for treating older recipients.

scholarly journals Post-Transplant Diabetes Mellitus in Kidney Transplant Recipients: A Multi-Center Study

Kidney360 ◽  
2021 ◽  
pp. 10.34067/KID.0000862021
Author(s):  
Rubab F. Malik ◽  
Yaqi Jia ◽  
Sherry G. Mansour ◽  
Peter P. Reese ◽  
Isaac E. Hall ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Risk Factors ◽  
Kidney Transplant ◽  
Graft Failure ◽  
De Novo ◽  
Kidney Transplant Recipients ◽  
Post Transplant ◽  
Kidney Recipients ◽  
Recipient Age

Background: De novo post-transplant diabetes mellitus (PTDM) is a common complication after kidney transplant (KT). Most recent studies are single-center with various approaches to outcome ascertainment. Methods: In a multi-center longitudinal cohort of 632 non-diabetic adult kidney recipients transplanted in 2010-2013, we ascertained outcomes through detailed chart review at 13 centers. We hypothesized that donor characteristics such as sex, HCV infection, and kidney donor profile index (KDPI) and recipient characteristics such as age, race, BMI, and increased HLA mismatches would affect the development of PTDM among KT recipients. We defined PTDM as hemoglobin A1c ≥6.5%, pharmacological treatment for diabetes, or documentation of diabetes in electronic medical records. We assessed PTDM risk factors and evaluated for an independent time-updated association between PTDM and graft failure using regression. Results: Mean recipient age was 52±14 years, 59% were male, 49% were Black. Cumulative PTDM incidence 5 years post-KT was 29% (186). Independent baseline PTDM risk factors included older recipient age (p<0.001) and higher BMI (p=0.006). PTDM was not associated with all-cause graft failure [adjusted Hazard Ratio (aHR) 1.10 (95% CI: 0.78-1.55)], death-censored graft failure [aHR 0.85 (0.53-1.37)], or death [aHR 1.31 (0.84-2.05)] at median follow-up of 6 (4.0,6.9) years post-KT. Induction and maintenance immunosuppression were not different between patients who did and did not develop PTDM. Conclusions: PTDM occurred commonly, and higher baseline BMI was associated with PTDM. PTDM was not associated with graft failure or mortality during the 6-year follow-up, perhaps due to short follow-up.

scholarly journals Calcium and phosphate levels after kidney transplantation and long-term patient and allograft survival

2020 ◽  
Author(s):  
Julio Chevarria ◽  
Donal J Sexton ◽  
Susan L Murray ◽  
Chaudhry E Adeel ◽  
Patrick O’Kelly ◽  
...  
Keyword(s):  
Risk Factors ◽  
Renal Transplant ◽  
Graft Failure ◽  
Graft Function ◽  
Renal Transplant Recipients ◽  
Post Transplant ◽  
All Cause Mortality ◽  
Transplant Function ◽  
The Republic ◽  
The Impact

Abstract Background Non-traditional cardiovascular risk factors, including calcium and phosphate derangement, may play a role in mortality in renal transplant. The data regarding this effect are conflicting. Our aim was to assess the impact of calcium and phosphate derangements in the first 90 days post-transplant on allograft and recipient outcomes. Methods We performed a retrospective cohort review of all-adult, first renal transplants in the Republic of Ireland between 1999 and 2015. We divided patients into tertiles based on serum phosphate and calcium levels post-transplant. We assessed their effect on death-censored graft survival and all-cause mortality. We used Stata for statistical analysis and did survival analysis and spline curves to assess the association. Results We included 1525 renal transplant recipients. Of the total, 86.3% had hypophosphataemia and 36.1% hypercalcaemia. Patients in the lowest phosphate tertile were younger, more likely female, had lower weight, more time on dialysis, received a kidney from a younger donor, had less delayed graft function and better transplant function compared with other tertiles. Patients in the highest calcium tertile were younger, more likely male, had higher body mass index, more time on dialysis and better transplant function. Adjusting for differences between groups, we were unable to show any difference in death-censored graft failure [phosphate = 1.14, 95% confidence interval (CI) 0.92–1.41; calcium = 0.98, 95% CI 0.80–1.20] or all-cause mortality (phosphate = 1.10, 95% CI 0.91–1.32; calcium = 0.96, 95% CI 0.81–1.13) based on tertiles of calcium or phosphate in the initial 90 days. Conclusions Hypophosphataemia and hypercalcaemia are common occurrences post-kidney transplant. We have identified different risk factors for these metabolic derangements. The calcium and phosphate levels exhibit no independent association with death-censored graft failure and mortality.

Time-Varying Proteinuria and the Risk of Cardiovascular Disease and Graft Failure in Kidney Transplant Recipients

2021 ◽  
Vol 31 (4) ◽  
pp. 288-297
Author(s):  
Tanya Kuper ◽  
Olusegun Famure ◽  
Jamie Greenfield ◽  
Yanhong Li ◽  
Syed Ibrahim ◽  
...  
Keyword(s):  
Kidney Transplant ◽  
Graft Failure ◽  
Graft Loss ◽  
Major Adverse Cardiac Events ◽  
Transplant Recipients ◽  
Kidney Transplant Recipients ◽  
Cardiac Events ◽  
Urine Protein ◽  
Hazard Ratios ◽  
Adverse Cardiac Events

Introduction: Proteinuria is recognized as an independent risk factor for cardiovascular disease in kidney transplant recipients, but previous studies have not considered the impact of changes in urine protein over time. Research Question and Design: We used time-dependent, multivariable Cox proportional hazards models in this observational cohort study of adult kidney transplant recipients to evaluate whether proteinuria measured by dipstick on random spot urine samples starting from 1-month post-transplant was associated with the risk of major adverse cardiac events and graft loss. Results: A total of 144 major adverse cardiac events, defined as acute myocardial infarction, cerebrovascular accident, revascularization, or all-cause mortality, were observed in 1106 patients over 5728.7 person-years. Any level of proteinuria greater or equal to trace resulted in a two-fold increase in the risk of major adverse cardiac events (hazard ratio 2.00 [95% confidence interval 1.41, 2.84]). This relationship was not found to be dose-dependent (hazard ratios of 2.98, 1.76, 1.63, and 1.54 for trace, 1+, 2+, and 3+ urine protein, respectively). There was an increased risk of graft failure with greater urine protein concentration (hazard ratios 2.22, 2.85, 6.41, and 19.71 for trace, 1+, 2+, and 3+, respectively). Conclusion: Urine protein is associated with major adverse cardiac events and graft loss in kidney transplant recipients. The role of interventions to reduce proteinuria on decreasing the risk of adverse cardiovascular and graft outcomes in kidney transplant recipients requires further study.

scholarly journals Cardiovascular risk assessment by Framingham score pre and post kidney transplant

2016 ◽  
Vol 19 (2) ◽  
pp. 13-17
Author(s):  
Marcos Vinicius de Sousa ◽  
Nayara Tenório ◽  
Carla Feitosa do Valle ◽  
Marilda Mazzali
Keyword(s):  
Risk Factors ◽  
Total Cholesterol ◽  
Kidney Transplant ◽  
Risk Score ◽  
Graft Loss ◽  
Left Ventricular ◽  
Inclusion Criteria ◽  
Kidney Transplants ◽  
Post Transplant ◽  
Significant Difference

Cardiovascular mortality is the main cause for graft loss after a successful kidney transplant. Purpose: To analyze the risk for cardiovascular events by the Framinghan risk score, pre and 1-year after kidney transplant. Methods: Retrospective study analyzing the transplant Unit database of kidney transplants performed from January 2010 to January 2012. Inclusion criteria: age >18 years old, functioning graft 12 months post-transplant. Exclusion criteria: patient death or graft loss within the first year after transplant. Demographic and laboratory data were collected pre and 12 months post-transplant; the Framinghan risk score was calculated at those points. Pre-transplant echocardiogram was also analyzed. Results: From 230 kidney transplants performed during the studied period, 167 fulfilled the inclusion criteria. Sixty-three were excluded due to death or graft loss (n=29) or insufficient data for analysis. In the majority, the studied group was male (64.6%), mean age of 47.9+11.1 years old and recipients from deceased donor (97%). Echocardiogram showed a 67.5 +6.6% ejection fraction, left ventricular hypertrophy in 98%, with a low incidence of valvar calcification (2.5%). Framinghan score was similar pre and after transplant (16.4+14.9 vs. 18.3 +17.2, p=ns). However, analysis of isolated parameters showed a significant difference pre and after transplant. While pre-transplant risk factors were high blood pressure, lower HDL cholesterol, and active smoking, post-transplant risk factors were the occurrence of diabetes, higher total cholesterol that required anti-hypertensive therapy. Conclusion: the early after transplant results, recovery of renal function, hematocrit and nutritional levels in the body weight gain usually along with impaired metabolic parameters, mainly total cholesterol, triglyceryde and uric acid maintained a similar Framinghan risk score as pre-transplant levels.

Impact of pretransplant mitral annular calcification on the incidence of cardiac events after renal transplantation

2019 ◽  
Vol 35 (3) ◽  
pp. 526-533 ◽  
Author(s):  
Nadia El Hangouche ◽  
Javier Gomez ◽  
Addis Asfaw ◽  
Jayakumar Sreenivasan ◽  
Tauseef Akhtar ◽  
...  
Keyword(s):  
Risk Factors ◽  
Renal Transplantation ◽  
Single Photon ◽  
Photon Emission ◽  
Emission Computed Tomography ◽  
Cardiac Events ◽  
Mitral Annular Calcification ◽  
Post Transplant ◽  
Increased Risk ◽  
Annular Calcification

Abstract Background Mitral annular calcification (MAC) is associated with increased risk of major adverse cardiac events. We hypothesized that MAC, identified on a pretransplant transthoracic echocardiography (TTE), is predictive of cardiac events following renal transplantation (RT). Methods In a retrospective cohort of consecutive RT recipients, pretransplant MAC presence and severity were determined on TTE performed within 1 year prior to transplant. MAC severity was quantified based on the circumferential MAC extension relative to the mitral valve annulus. Post-transplant cardiac risk was assessed using the sum of risk factors (range: 0–8) set forth by the American Heart Association/American College of Cardiology Foundation consensus statement on the assessment of RT candidates. Subjects underwent pretransplant stress single-photon emission computed tomography myocardial perfusion imaging and followed for post-transplant composite outcome of cardiac death or myocardial infarction (CD/MI). Results Among 336 subjects (60.5% men; mean age 52 ± 12 years), MAC was present in 78 (23%) patients. During a mean follow-up of 3.1 ± 1.9 years, a total of 70 events were observed. Patients with MAC had a higher event rate compared with those without MAC (34.6% versus 17.8%, log-rank P = 0.001). There was a stepwise increase in CD/MI risk with increasing MAC severity (P for trend = 0.002). MAC-associated risk remained significant after adjusting for sex, duration of dialysis, sum of risk factors, ejection fraction and perfusion abnormality burden, providing an incremental prognostic value to these parameters (Δχ2 =4.63; P = 0.031). Conclusion Among RT recipients, the burden of pretransplant MAC is an independent predictor of post-transplant risk of CD/MI. MAC should be considered in the preoperative assessment of RT candidates.

scholarly journals Clinical Relevance of HLA Antibody Monitoring after Kidney Transplantation

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Christian Morath ◽  
Gerhard Opelz ◽  
Martin Zeier ◽  
Caner Süsal
Keyword(s):  
Risk Factors ◽  
Kidney Transplantation ◽  
Organ Transplantation ◽  
Clinical Relevance ◽  
De Novo ◽  
Graft Loss ◽  
Specific Antibodies ◽  
Graft Outcome ◽  
The Impact ◽  
Hla Antibody

In kidney transplantation, antibody-mediated allograft injury caused by donor HLA-specific antibodies (DSA) has recently been identified as one of the major causes of late graft loss. This paper gives a brief overview on the impact of DSA development on graft outcome in organ transplantation with a focus on risk factors forde novoalloantibody induction and recently published guidelines for monitoring of DSA during the posttransplant phase.

Cardiac Complications Following Allogeneic Bone Marrow Transplantation: Evaluation of Risk Factors, Outcomes and Enhanced Screening for At Risk Populations.

Blood ◽  
2012 ◽  
Vol 120 (21) ◽  
pp. 3070-3070
Author(s):  
Michael Henry ◽  
Rong Guo ◽  
Mala Parthasarathy ◽  
John Lopez ◽  
Patrick Stiff
Keyword(s):  
Risk Factors ◽  
Atrial Fibrillation ◽  
High Risk ◽  
Organ Transplant ◽  
Solid Organ Transplant ◽  
Low Risk ◽  
Solid Organ ◽  
Cardiac Events ◽  
Post Transplant ◽  
Risk Patients

Abstract Abstract 3070 Life-threatening cardiac events following allogeneic bone marrow transplants (BMT) are not uncommon at 5–12.5% of patients. While BMT programs perform screening EKGs and ejection fraction measurements, solid organ transplant centers follow a risk stratification screening algorithm to assess for coronary artery disease (CAD) which includes stress tests and as indicated, angiography in those with 2 or more risk factors. It is currently unknown whether this algorithm should be applied in the BMT setting. Methods: We performed a retrospective review of 296 patients who underwent allogeneic BMT at Loyola University Medical Center 2007–2011, to assess cardiac events using the solid organ transplant advanced screening criteria: age over 60 or over 40 with peripheral vascular disease or diabetes and then divided patients into low risk (one CV risk factor) and high risk groups (greater than one CV risk factor). Risk factors included age, hypertension, diabetes, smoking, family history of CAD, and obesity according to the Framingham risk assessment score for CAD. Cardiac events during the first year post-transplant were recorded including CHF, myocardial infarction (MI), and symptomatic arrhythmias. One hundred day and 1-year Kaplan-Meier survival for high and low risk patients were determined and curves compared by log-rank tests. A multivariate analysis of the various prognostic factors was performed using the Cox regression model. Results: Of the 296 total allografts, 116 patients (39%) fit the solid organ transplant criteria for advanced screening; 62% were male (n = 72) and the mean age was 60.6 (range 40–72). Graft source was evenly distributed between siblings (42%), unrelated (39%) and cord blood (28%). Acute myeloid leukemia was the most common indication for BMT at 40%, followed by MDS (21%), non-Hodgkin lymphoma (16%), and CLL (10%). Of the 116, 21 were considered low risk (1 risk factor), while 95 were high risk (2+ risk factors). Low risk and high risk groups did not differ in disease type (p = 0.43), graft source (p = 0.81), or graft type (p = 0.54). Surprisingly, both high and low risk patients had a similar incidence of cardiac events of 36% and 48%, respectively. This correlated to comparable 100-day and 1 year survival rates. To determine the importance of cardiac complications on outcome and whether there were other risk factors for complications we analyzed those with a complication. Forty-four cardiac events occurred in the first year after transplant in 38 (33%) patients. Cardiac events included arrhythmias (n = 33), new onset CHF (n = 6), and MI (n = 5). Median time to event was 16 days post-transplant. Symptomatic arrhythmias included atrial fibrillation (n = 27, 82%), supraventricular tachycardia (n = 5, 15%) and sustained ventricular tachycardia (n =1, 3%). Median age for patients with cardiac events was 62.7 years, compared to 59.6 for patients who experienced no cardiac events (hazard ratio estimate: 1.076; p = 0.02). As compared to patients with no post-transplant cardiac events, both the 100 day and 1 year survival rates of patients with cardiac events were lower with one year survival of 21% vs. 63% (p < 0.0001). Evaluating risk factors, 3 were significant: donor source with MUD donors the highest hazard (p = 0.04); age, with cardiac events occurring at a rate twice as high in patients greater than age 60 (n = 27, 36.5% vs. n = 6, 19.4%), and with all five cases of myocardial infarction and 5/6 new CHF diagnoses occurring in patients aged 60 or greater; and patients with a history of atrial fibrillation demonstrated a higher probability of developing a cardiac event post-transplant (p = 0.02). Conclusions: In this analysis, we saw a much higher incidence of post-BMT cardiac events (33%) than previously reported, although we focused only on at risk patients using the solid organ screening algorithm (pts > 40 with significant risk factors or all pts > 60). As mortality rates at 100 day and 1 year are higher for patients who suffer a post-BMT cardiac event, and only graft source, age and prior atrial fibrillation marked patients at a very high risk, this data indicates that it is appropriate to investigate prospectively the solid organ transplant algorithm in all allogeneic BMT patients > age 40, with low cardiac risk or any patient > 60 with stress tests and as indicated, cardiac catheterization. Whether this will decrease events and thereby improve survival remains to be determined by prospective studies. Disclosures: No relevant conflicts of interest to declare.

Sign in / Sign up

Export Citation Format

Share Document