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Introduction: Coexistence of chronic kidney disease (CKD) in the case of acute coronary syndromes (ACS) significantly worsens the outcomes., Aim: The aim of our study was to assess renal function impact on mortality among patients with ACS., Materials and Methods: The study was based on records of 21,985 patients hospitalized in the Medical University of Bialystok in 2009-2015. Inclusion criteria were ACS. Exclusion criteria were: death within 24 h of admission, eGFR <15 ml/min/1.73 m 2 , hemodialysis. Mean observation time was 2296 days., Results: Criteria were met by 2213 patients. CKD occurred in 24.1% ( N  = 533) and more often affected those with NSTEMI (26.2 (337) vs. 21.2 (196), p  = .006). STEMI patients had higher incidence of post-contrast acute kidney injury (PC-AKI) (5 (46) vs. 4.1 (53), p  < .001). During the study, 705 people died (31.9%), more often with NSTEMI (33.2% (428) vs. 29.95% (277), p  < .001). However, from a group of patients suffering from PC-AKI 57.6% died. The risk of PC-AKI increased with creatinine concentration (RR: 2.990, 95%CI: 1.567-5.721, p  < .001), occurrence of diabetes mellitus (RR: 2.143, 95%CI: 1.029-4.463, p  = .042), atrial fibrillation (RR: 2.289, 95%CI: 1.056-4.959, p  = .036). Risk of death was greater with an increase in postprocedural creatinine concentration (RR: 2.254, 95%CI: 1.481-3.424, p  < .001)., Conclusion: PC-AKI is a major complication in patients with ACS, occurs more frequently in STEMI and may be a prognostic marker of long-term mortality in patients undergoing percutaneous coronary intervention (PCI). More attention should be given to the prevention and diagnosis of PC-AKI but necessary PCI should not be withheld in fear of PC-AKI.

Introduction: In the elderly, impairment of kidney function occurs. Renal diseases overlap with anatomic and functional changes related to age-related involutionary processes. Mortality among patients with acute renal injury is approximately 50%, despite advances in treatment and diagnosis of AKI., The Aim: To assess the incidence of acute kidney injury in elderly patients and to analyze the causes of acute renal failure depending on age., Material and Methods: A retrospective analysis included medical documentation of patients hospitalized in the Nephrology Clinic during the 6-month period. During this period 452 patients were hospitalized in the clinic. A group of 77 patients with acute renal failure as a reason for hospitalization was included in the study., Results: The prerenal form was the most common cause of AKI in both age groups. In both age groups, the most common cause was dehydration; in the group of patients up to 65 years of age, dehydration was 29.17%; in the group of people over 65 years - 43.39%. Renal replacement therapy in patients with AKI was used in 14.29% of patients. In the group of patients up to 65 years of age hemodialysis was 16.67% and above 65 years of age. -13.21% of patients. The average creatinine level in the group of younger patients at admission was 5.16 ± 3.71 mg / dl, in the group of older patients 3.14 ± 1.63 mg / dl. The size of glomerular filtration GFR in the group of younger patients at admission was 21.14 ± 19.54 ml / min, in the group of older patients 23.34 ± 13.33 ml / min., Conclusions: The main cause of acute kidney injury regardless of the age group was dehydration. Due to the high percentage of AKI in the elderly, this group requires more preventive action, not only in the hospital but also at home.

Acute respiratory distress together with hypoxia could be an indication for admission to intensive care unit. It may also lead to acute kidney injury. In addition, mechanical ventilation may be an additional factor for development of acute kidney injury. The aim of the work was to assess the prevalence of acute kidney injury, including the need for renal replacement therapy in patients with acute respiratory distress treated in intensive care unit. In addition, the effect of acute kidney injury on outcome of patients with acute respiratory distress was evaluated. The studies were performed on 100 patients with acute respiratory distress treated in intensive care unit of the regional hospital. Patients were divided into 2 groups in respect to the presence or absence of acute kidney injury. Acute kidney injury was diagnosed in 22% of patients with acute respiratory distress, while 12% required renal replacement therapy, it was more often observed in patients with estimated GFR < 60 ml/min/1.73m2. Length of stay was similar irrespective of kidney function, however, the mortality was significantly higher in patients with eGFR < 60 ml/min/1.73 m2, particularly in those on hemodialyses. In addition, mortality was associated with older age and sepsis.

Atrial fibrillation (AF) symptoms may mimic coronary artery disease (CAD) which reflects the difficulties in qualifying AF patients for invasive diagnostics. A substantial number of coronary angiographies may be unnecessary or even put patients at risk of post-contrast acute kidney injury (PC-AKI), especially patients with chronic kidney disease (CKD). We aimed to investigate the hypothesis indicating higher prevalence of PC-AKI in patients with AF scheduled for coronary angiography. The study population comprised of 8026 patients referred for elective coronarography including 1621 with AF. In the comparison of prevalence of PC-AKI in distinguished groups we can see that kidney impairment was twice more frequent in patients with AF in both groups with CKD (CKD (+)/AF (+) 6.24% vs. CKD (+)/AF (−) 3.04%) and without CKD (CKD (−)/AF (+) 2.32% vs. CKD (−)/AF (−) 1.22%). In our study, post-contrast acute kidney disease is twice more frequent in patients with AF, especially in subgroup with chronic kidney disease scheduled for coronary angiography. Additionally, having in mind results of previous studies stating that AF is associated with non-obstructive coronary lesions on angiography, patients with AF and CKD may be unnecessarily exposed to contrast agent and possible complications. [ABSTRACT FROM AUTHOR]