ESAIC focused guideline for the use of cardiac biomarkers in perioperative risk evaluation: Endorsement by the Scandinavian Society of Anaesthesiology and Intensive Care Medicine.

BACKGROUND: The Clinical Practice Committee of the Scandinavian Society of Anaesthesiology and Intensive Care Medicine endorses the clinical practice guideline "ESAIC focused guideline for the use of cardiac biomarkers in perioperative risk evaluation." The guideline can provide guidance to Nordic anaesthesiologists on the perioperative use of cardiac biomarkers in patients undergoing non-cardiac surgery.

Awake proning in patients with COVID-19-related hypoxemic acute respiratory failure: Endorsement by the Scandinavian Society of Anaesthesiology and Intensive Care Medicine.

BACKGROUND: Awake proning in spontaneously breathing patients with hypoxemic acute respiratory failure was applied during the coronavirus disease 2019 (COVID-19) pandemic to improve oxygenation while avoiding tracheal intubation. An updated systematic review and meta-analysis on the topic was published. METHODS: The Clinical practice committee (CPC) of the Scandinavian Society of Anaesthesiology and Intensive Care Medicine (SSAI) assessed the clinical practice guideline "Awake proning in patients with COVID-19-related hypoxemic acute respiratory failure: A rapid practice guideline" for possible endorsement. The Appraisal of Guidelines for REsearch and Evaluation (AGREE) II tool was used. RESULTS: Four out of six SSAI CPC members completed the appraisal. The individual domain totals were: Scope and Purpose 90%; Stakeholder Involvement 89%; Rigour of Development 74%; Clarity of Presentation 85%; Applicability 75%; Editorial Independence 98%; Overall Assessment 79%. CONCLUSION: The SSAI CPC endorses the clinical practice guideline "Awake proning in patients with COVID-19-related hypoxemic acute respiratory failure: A rapid practice guideline". This guideline serves as a useful decision aid for clinicians caring for critically ill patients with COVID-19-related acute hypoxemic respiratory failure and can be used to provide guidance on use of prone positioning in this group of patients.

Association between pre-operative prolonged corrected QT interval and all-cause mortality after non-cardiac surgery.

BACKGROUND: Prolonged corrected QT interval (QTc) has been linked to risk of arrhythmias and mortality in the general population. Pre-operative electrocardiography is often obtained for patient-and procedural cardiovascular risk assessment. The aim of this study was to investigate the association of pre-operative QTc and all-cause mortality in a non-cardiac surgical cohort. METHODS: A retrospective study of all patients over 18 years undergoing non-cardiac surgery at Landspitali-the National University Hospital in Iceland between 2 January 2005 to 31 December 2015, with follow-up through 20 May 2016. Patients were separated into five categories according to their pre-operative QTc interval ≤ 379, 380-439 (reference group), 440-479, 480-519 and ≥520 ms. Primary outcome was long-term mortality and secondary outcome was 30-day mortality. RESULTS: A total of 10,209 surgeries for 10,209 individuals were included. The median follow-up for mortality was 2691 days (interquartile range [IQR] 1620-3705 days). Patients with longer QTc interval had a higher comorbidity burden, were more likely to undergo emergency surgery and were often prescribed cardiac medications. After adjustment for confounding variables, the hazard ratio (HR) for long-term mortality compared with reference (QTc 380-439 ms) was 0.85 [CI: 0.66-1.09] for QTc ≤379, 1.08 [CI: 0.99-1.17] for QTc 440-479 ms, 1.26 [CI: 1.10-1.43] for QTc between 480 and 519 ms and 0.97 [CI: 0.78-1.21] for QTc ≥520 ms. When compared with reference, only patients with QTc interval between 480 and 519 ms had higher odds ratio for 30-day mortality as odds ratio for other groups were following; 1.12 [CI: 0.18-3.8] for ≤379 ms, 1.03 [CI: 0.70-1.51] for QTc 440-479 ms, 1.64 [CI: 1.02-2.60] for QTc 480-519 ms and 0.98 [0.44-2.06] for QTc ≥520 ms. CONCLUSION: Pre-operative QTc between 480 and 519 ms is associated with both higher long-term and 30-day mortality after non-cardiac surgery. The results suggest that this could reflect an underlying cardiovascular risk.

Saudi Critical Care Society clinical practice guidelines on the prevention of venous thromboembolism in adults with trauma: Endorsement by the Scandinavian Society of Anaesthesiology and Intensive Care Medicine.

The Clinical Practice Committee of the Scandinavian Society of Anaesthesiology and Intensive Care Medicine endorses the clinical practice guideline Saudi Critical Care Society clinical practice guidelines on the prevention of venous thromboembolism in adults with trauma: reviewed for evidence-based integrity and endorsed by the Scandinavian Society of Anaesthesiology and Intensive Care Medicine. This clinical practice guideline serves as a useful decision aid for Nordic anaesthesiologists managing adult trauma patients in the operating room and in the intensive care unit.

ISTH guidelines for antithrombotic treatment in COVID-19: Endorsement by the Scandinavian Society of Anaesthesiology and Intensive Care Medicine.

The Clinical Practice Committee of the Scandinavian Society of Anaesthesiology and Intensive Care Medicine endorses the ISTH guidelines for antithrombotic treatment in COVID-19. This evidence-based guideline serves as a useful decision aid for Nordic anaesthesiologists caring for patients with COVID-19.

New-onset atrial fibrillation in critically ill adult patients-an SSAI clinical practice guideline.

BACKGROUND: Acute or new-onset atrial fibrillation (NOAF) is the most common cardiac arrhythmia in critically ill adult patients, and observational data suggests that NOAF is associated to adverse outcomes. METHODS: We prepared this guideline according to the Grading of Recommendations Assessment, Development and Evaluation methodology. We posed the following clinical questions: (1) what is the better first-line pharmacological agent for the treatment of NOAF in critically ill adult patients?, (2) should we use direct current (DC) cardioversion in critically ill adult patients with NOAF and hemodynamic instability caused by atrial fibrillation?, (3) should we use anticoagulant therapy in critically ill adult patients with NOAF?, and (4) should critically ill adult patients with NOAF receive follow-up after discharge from hospital? We assessed patient-important outcomes, including mortality, thromboembolic events, and adverse events. Patients and relatives were part of the guideline panel. RESULTS: The quantity and quality of evidence on the management of NOAF in critically ill adults was very limited, and we did not identify any relevant direct or indirect evidence from randomized clinical trials for the prespecified PICO questions. We were able to propose one weak recommendation against routine use of therapeutic dose anticoagulant therapy, and one best practice statement for routine follow-up by a cardiologist after hospital discharge. We were not able to propose any recommendations on the better first-line pharmacological agent or whether to use DC cardioversion in critically ill patients with hemodynamic instability induced by NOAF. An electronic version of this guideline in layered and interactive format is available in MAGIC: https://app.magicapp.org/#/guideline/7197. CONCLUSIONS: The body of evidence on the management of NOAF in critically ill adults is very limited and not informed by direct evidence from randomized clinical trials. Practice variation appears considerable.

The Nordic perioperative and intensive care registries-Collaboration and research possibilities.

BACKGROUND: The Nordic perioperative and intensive care registries have been built up during the last 25 years to improve quality in intensive and perioperative care. We aimed to describe the Nordic perioperative and intensive care registries and to highlight possibilities and challenges in future research collaboration between these registries. MATERIAL AND METHOD: We present an overview of the following Nordic registries: Swedish Perioperative Registry (SPOR), the Danish Anesthesia Database (DAD), the Finnish Perioperative Database (FIN-AN), the Icelandic Anesthesia Database (IS-AN), the Danish Intensive Care Database (DID), the Swedish Intensive Care Registry (SIR), the Finnish Intensive Care Consortium, the Norwegian Intensive Care and Pandemic Registry (NIPaR), and the Icelandic Intensive Care Registry (IS-ICU). RESULTS: Health care systems and patient populations are similar in the Nordic countries. Despite certain differences in data structure and clinical variables, the perioperative and intensive care registries have enough in common to enable research collaboration. In the future, even a common Nordic registry could be possible. CONCLUSION: Collaboration between the Nordic perioperative and intensive care registries is both possible and likely to produce research of high quality. Research collaboration between registries may have several add-on effects and stimulate international standardization regarding definitions, scoring systems, and benchmarks, thereby improving overall quality of care.

Prevalence of modifiable risk factors in primary elective arthroplasty and their association with infections.

BACKGROUND AND PURPOSE: The aim of this study was to identify the prevalence of modifiable risk factors of surgical site infections (SSI) in patients undergoing primary elective total joint arthroplasty (TJA) receiving conventional preoperative preparation, and to explore their association with infectious outcomes. PATIENTS AND METHODS: Information regarding modifiable risk factors (anemia, diabetes, obesity, nutritional status, smoking, physical activity) was prospectively gathered in patients undergoing primary TJA of hip or knee in 2018-2020 at a single institution with 6 weeks' follow-up time. RESULTS: 738 patients (median age 68 years [IQR 61-73], women 57%) underwent TJA (knee 64%, hip 36%). Anemia was detected in 8%, diabetes was present in 9%, an additional 2% had undiagnosed diabetes (HbA1c > 47 mmol/mol), and 8% dysglycemia (HbA1c 42-47 mmol/mol). Obesity (BMI ≥ 30) was observed in 52%. Serum albumin, total lymphocyte count, and vitamin D below normal limits was identified in 0.1%, 18%, and 16%, respectively. Current smokers were 7%. Surgical site complications occurred in 116 (16%), superficial SSI in 57 (8%), progressing to periprosthetic joint infection in 7 cases. Univariate analysis identified higher odds of superficial SSI for BMI ≥ 30 (OR 2.1, 95%CI 1.2-3.8) and HbA1c ≥ 42 mmol/mol (OR 2.2, CI 1.1-4.2), but no association was found with other factors. CONCLUSION: In a general population undergoing primary TJA an association was found between obesity (52%) and dysglycemia/diabetes (19%) and superficial SSI (8%), which progressed to PJI in 12% of cases, generating a 1% total rate of PJI. Modification of these risk factors might mitigate infectious adverse outcomes.

[The incidence of postoperative and persistent usage of proton pump inhibitors following surgery].

INTRODUCTION: The use of proton pump inhibitors (PPI) has increased over the past decades. Some patients use the medication without an indication. It is possible that new use will start following surgery. The study aimed to examine the incidence of postoperative use of PPI following surgeries and the ratio of new persistent users over three months postoperatively as well as patient- and procedural variables associated with new use and new persistent use. METHODS: Data of surgeries among adults that had undergone surgeries at the National University Hospital of Iceland from 2006 to 2018. The data were from the Icelandic perioperative database, containing information regarding medication usage preceding and following surgeries. The ratio of those who started using PPI within three months of surgery was assessed, and the ratio of persistent users. RESULTS: Altogether, 2886 out of 42.530 patients filled PPI prescription within three months after their first surgery. Annual incidence was 67 per 1.000 surgeries, and the ratio of persistent users was 54%, although both the varied between years. The use was more common among women, highest in age group 56-65 years old, patients with polypharmacy (5-9 medicines) and who underwent abdominal surgeries. CONCLUSIONS: New postoperative PPI use is common following surgery and half of the patients with new use develop new persistent use. The usage increased similar to the increased number of prescriptions and sales of PPI in other patient groups during the period. The results indicate the need for further monitoring of patients with PPI prescriptions following surgeries in Iceland.

A nationwide study on characteristics and outcome of cancer patients with sepsis requiring intensive care.

BACKGROUND: Sepsis is the leading cause of admission to the intensive care unit (ICU) for cancer patients and survival rates have historically been low. The aims of this nationwide cohort study were to describe the characteristics and outcomes of cancer patients admitted to the ICU with sepsis compared with other sepsis patients requiring ICU admission. MATERIAL AND METHODS: This was a retrospective, observational study. All adult admissions to Icelandic ICUs during years 2006, 2008, 2010, 2012, 2014 and 2016 were screened for severe sepsis or septic shock by ACCP/SCCM criteria. Clinical characteristics and outcomes of sepsis patients with cancer were compared to those without cancer. RESULTS: In the study period, 235 of 971 (24%) patients admitted to Icelandic ICUs because of sepsis had cancer, most often a solid tumour (100), followed by metastatic tumours (69) and haematological malignancies (66). Infections were more often hospital-acquired in cancer patients (52%) than other sepsis patients (18%, p < 0.001) and sites of infections differed, with abdominal infections being most common in patients with solid and metastatic tumours but lungs and bloodstream infections in haematological malignancies. The length of stay in the ICU was shorter for sepsis patients with metastatic disease than other sepsis patients (2 vs. 4 days, p < 0.001) and they were more likely to have treatment limitations (52 vs. 19%, p < 0.05). Median survival of patients with metastatic disease was 19 days from ICU admission. The 28-day mortality (25%) of solid tumour patients was comparable to that of sepsis patients without cancer (20%, p < 0.001). CONCLUSIONS: Cancer is a common comorbidity in patients admitted to the ICU with sepsis. The clinical presentation and outcome differs between cancer types. Individuals with metastatic cancer were unlikely to receive prolonged invasive ICU care treatment. Comparable short-term outcome was found for patients with solid tumours and no cancer.

Circulating N-formylmethionine and metabolic shift in critical illness: a multicohort metabolomics study.

BACKGROUND: Cell stress promotes degradation of mitochondria which release danger-associated molecular patterns that are catabolized to N-formylmethionine. We hypothesized that in critically ill adults, the response to N-formylmethionine is associated with increases in metabolomic shift-related metabolites and increases in 28-day mortality. METHODS: We performed metabolomics analyses on plasma from the 428-subject Correction of Vitamin D Deficiency in Critically Ill Patients trial (VITdAL-ICU) cohort and the 90-subject Brigham and Women's Hospital Registry of Critical Illness (RoCI) cohort. In the VITdAL-ICU cohort, we analyzed 983 metabolites at Intensive Care Unit (ICU) admission, day 3, and 7. In the RoCI cohort, we analyzed 411 metabolites at ICU admission. The association between N-formylmethionine and mortality was determined by adjusted logistic regression. The relationship between individual metabolites and N-formylmethionine abundance was assessed with false discovery rate correction via linear regression, linear mixed-effects, and Gaussian graphical models. RESULTS: Patients with the top quartile of N-formylmethionine abundance at ICU admission had a significantly higher adjusted odds of 28-day mortality in the VITdAL-ICU (OR, 2.4; 95%CI 1.5-4.0; P = 0.001) and RoCI cohorts (OR, 5.1; 95%CI 1.4-18.7; P = 0.015). Adjusted linear regression shows that with increases in N-formylmethionine abundance at ICU admission, 55 metabolites have significant differences common to both the VITdAL-ICU and RoCI cohorts. With increased N-formylmethionine abundance, both cohorts had elevations in individual short-chain acylcarnitine, branched chain amino acid, kynurenine pathway, and pentose phosphate pathway metabolites. CONCLUSIONS: The results indicate that circulating N-formylmethionine promotes a metabolic shift with heightened mortality that involves incomplete mitochondrial fatty acid oxidation, increased branched chain amino acid metabolism, and activation of the pentose phosphate pathway.

Temporal trends in the epidemiology, management, and outcome of sepsis-A nationwide observational study.

BACKGROUND: Registry-based studies have shown increasing incidence of sepsis and declining mortality rates in recent years, but are inherently at risk of bias. The objectives of this study were to describe 11-year trends in the incidence, treatment and outcome of sepsis using clinical criteria with chart review. METHODS: This was a retrospective, observational study. All adult admissions to Icelandic ICUs during years 2006, 2008, 2010, 2012, 2014, and 2016 were screened for severe sepsis or septic shock by ACCP/SCCM criteria (sepsis-2). Incidence, patient characteristics, treatment and outcome were compared across the study years. RESULTS: During the six study years, 9166 patients were admitted to Icelandic ICUs, 971 (10.6%) because of severe sepsis or septic shock. The crude incidence of sepsis requiring admission to ICU remained stable between 0.55 and 0.75 per 1000 inhabitants. No statistically significant trends were observed over time in median patient age (67 years), APACHE II score (21), SOFA score (8) or Charlson Comorbidity Index (4). The time to antibiotic administration (median 1.8 h) in the emergency departments was stable over the study period but the time to lactate measurements decreased from 4.1 h in 2006 to 1.2 h in 2016, p < .001. The 28-day mortality was 25% and 1-year mortality 41%, both with no observed change with time. CONCLUSIONS: In a nationwide cohort, diagnosed with clinical criteria, the incidence of sepsis requiring intensive care did not change over an 11-year period. Mortality remained stable and only minimal changes were observed in initial resuscitation in the emergency departments.

Regional anaesthesia in patients on antithrombotic drugs - a joint ESAIC/ESRA guideline: Endorsement by the Scandinavian Society of Anaesthesiology and Intensive Care Medicine.

The Clinical Practice Committee of the Scandinavian Society of Anaesthesiology and Intensive Care Medicine endorses the clinical practice guideline Regional anaesthesia in patients on antithrombotic drugs - a joint ESAIC/ESRA guideline. This clinical practice guideline serves as a useful decision aid for Nordic anaesthesiologists providing regional anaesthesia to adult patients on antithrombotic drugs.

Transfusion strategies in bleeding critically ill adults: A clinical practice guideline from the European Society of Intensive Care Medicine: Endorsement by the Scandinavian Society of Anaesthesiology and Intensive Care Medicine.

The Clinical Practice Committee of the Scandinavian Society of Anaesthesiology and Intensive Care Medicine endorses the clinical practice guideline Transfusion strategies in bleeding critically ill adults: a clinical practice guideline from the European Society of Intensive Care Medicine. This trustworthy clinical practice guideline serves as a useful decision aid for Nordic anaesthesiologists caring for critically ill patients with bleeding.

Changes in vitamin D metabolites at the time of critical illness and 6 months later-A prospective observational study.

BACKGROUND: Despite multiple studies suggesting that low 25(OH)D-vitamin levels are associated with worse outcomes in critically ill individuals, attempts to mitigate the outcomes by fixed dose enteral supplementation unguided by baseline or target blood levels have been unsuccessful. Since a single measurement of 25(OH)D may not optimally reflect an individual's vitamin D status, we studied the plasma concentration of different vitamin D metabolites and their recovery during and following resolution of acute critical illness. METHODS: A prospective observational study including patients 18 years and older admitted to a mixed medical-surgical ICU in Reykjavik, Iceland, located at a high-northern altitude (64° N). Vitamin D metabolites were measured at three timepoints; On admission (S1), 3-5 days following admission (S2) and after recovery from acute illness (median 178 days) (S3). Concentrations of total 25(OH)D-vitamin, cholecalciferol (D3 ), total 24,25(OH)D-vitamin, vitamin D binding protein (VDBP) were measured with LC-tandem mass spectrometry (LC-MS/MS) and free 25-(OH)D was measured with enzyme-linked immunosorbent assay. RESULTS: Most individuals were vitamin D deficient when assessed during critical illness, with 25(OH)D-vitamin levels under 30 ng/ml for 37/40 individuals at timepoint S1 and 34/38 at S2. After recovery, 18/30 patients were deficient at S3. Levels of all vitamin D metabolites measured were low during critical illness but rose substantially following resolution of acute illness. No strong correlation was found between markers of acute illness severity or duration and resolution of vitamin D metabolites in the interval between acute illness and recovery. CONCLUSIONS: In critically ill patients, levels of multiple vitamin D metabolites are low but substantial recovery occurs following resolution of acute illness. It is unclear whether a single metabolite is sufficient to assess vitamin D status of critically ill patients and guide potential supplementation.

[Acute myocardial infarction in young adults: incidence, risk factors and prognosis].

INTRODUCTION: The incidence of acute myocardial infarction (AMI) might not be decreasing as much among young adults as in the general population in recent years. The goal of our study was to explore incidence, risk factors and prognosis of AMI among young patients in Iceland. MATERIAL AND METHODS: This was a retrospective case control study. The data was obtained from the SCAAR-SWEDEHEART database, medical records from Landspitali University Hospital and the death register from the Directorate of Health. The epidemiology of women ≤55 years and men ≤50 years diagnosed with AMI (STEMI/NSTEMI) in Iceland in 2014-2020 was compared with older patients. RESULTS: Of all the cases (2852), 344 patients (12%) were young. No change was demonstrated in the incidence of AMI in the young patients during the study period. The proportion of STEMI was higher among young patients (52% vs. 35%, p<0.001). Smoking (50% vs. 26%, p<0.001) and obesity (BMI>30 kg/m2)(47% vs. 36%, p<0.01) were more prevalent in younger patiens compared to the older. Older patients were more likely to die in the year following the AMI, both from all-cause (7% vs. 3%, p<0.05) and cardiovascular mortality (7% vs. 3%, p<0.05). A difference in recurrent AMI between the young and older patients was not demonstrated (2% vs. 3%, p=0.3). CONCLUSION: During the research period, a change in the incidence of AMI among young patients, was not demonstrated. Younger patients with AMI have different risk factors than older patients, they have lower mortality rate but the same risk of recurrent AMI.

[Short- and long-term outcomes following surgery for primary spontaneous pneumothorax in Iceland].

BACKGROUND: Primary spontaneous pneumothorax (PSP) is a common disease where surgery is indicated for persistant air leak or recurrent pneumothorax. We studied the outcomes of PSP-surgery over a 28 year period in a whole nation. MATERIALS AND METHODS: A retrospective study on 386 patients (median age 24 years, 78% males) that underwent 430 PSP surgeries at Landspitali University Hospital 1991-2018. Annual incidence of the procedure was calculated and previous medical history, indication and type of surgery, complications and length of hospital stay were registered. Patients in four 7 year periods were compared, recurrent pneumothoraces requiring reoperation (median follow-up 16 years) registered and predictors of reoperation identified with logistic regression. RESULTS: Annually 14.5 PSP surgeries (median, range 9-27) were performed; the incidence decreasing by 2.9% per year on average. Every other patient smoked and 77% of surgeries were performed with video assisted thoracocopic surgery (VATS). The most common early complications (p<30 days from surgery) were persistent airleak (17%), pneumonia (2%) and empyema (0,5%). No patient died within 30 days from surgery. Reoperation for recurrent pneumothorax was performed on 27 patients; 24 following VATS (7%), median time from the primary surgery being 16 months. Logistic regression showed that younger patients were more likely to require reoperation for recurrent pneumothorax. CONCLUSIONS: Surgical treament for PSP is safe and major early complications rare. The rate of recurrent pneumothorax requiring surgery was 6%, which is similar to other studies. For unknown reasons the incidence of PSP surgery declined, but future research has to answer if it is linked to decreased smoking in the Icelandic population.

[Management and revascularization of diabetics with coronary artery disease in Iceland].

BACKGROUND: The incidence of diabetes is growing, and diabetics have increased risk of atherosclerosis and diffuse coronary artery disease (CAD). Our aim was to assess the revascularization treatment of diabetics with CAD in Iceland from 2010-2020, changes in management and long-term survival of patients. METHODS: All patients in Iceland with diabetes and CAD on cardiac catheterization 2010-2020 were included in this retrospective, population-based study. We analyzed data from the SCAAR/SWEDEHEART database: patients' background information, findings of cardiac catheterization, planned treatment and results. The Kaplan-Meier method was used to estimate long-term survival and Cox-regression-analysis to adjust for predictor variables. RESULTS: Of 1905 cases (1485 patients), 1230 (65%) underwent PCI, 274 (14%) CABG and 401 (21%) had medical therapy only. The age distribution differed: The PCI group had the widest age bracket, the CABG group the narrowest, and the medical therapy group had the highest mean age. Most patients with STEMI or cardiogenic shock underwent PCI, while most patients with concomitant heart-valve disease underwent CABG. The proportion of patients undergoing CABG increased with more diffuse CAD. 41% of patients with left main- and three-vessel disease underwent CABG while only 2% of those with single-vessel disease. From 2010-2020 the proportion of patients that underwent PCI increased from 49% to 72%. There was no difference in survival between the PCI and CABG groups (p=1.00). CONCLUSION: Three quarters of patients with diabetes and obstructive CAD are now treated with PCI. The PCI and CABG groups had overall equal survival but the groups had different characteristics.

[Management of patients with left main stem stenosis in Iceland 2010-2020: PCI or CABG].

INTRODUCTION: Coronary artery bypass surgery (CABG) has been standard treatment for patients with left main coronary artery disease (LMCAD) but percutaneous coronary intervention (PCI) can be a good alternative. Our aim was to evaluate revascularization of LMCAD-patients in Iceland and treatment changes in recent years. We also assessed the impact of patient background factors on treatment choice and long-term survival. METHODS: This retrospective, population-based registry-study analyzed data from the SCAAR-SWEDEHEART database. Patients with significant LMCAD on coronary angiography in Iceland 2010-2020, without previous history of CABG or contraindication for surgery were enrolled. The Kaplan-Meier method was used to study long-term survival and COX-regression analysis to adjust for predictor variables. FINDINGS: Of 702 LMCAD patients, 195 were treated with PCI, 460 with CABG and 47 with medical therapy. The widest age-range was in the PCI group and the mean age was highest in the medical therapy group. Patients with LMCAD and concomitant three vessel disease or heart valve disese were mostly treated with CABG (76.1% and 84.4%). The majority of patients with LMCAD only were treated with PCI, as well as patients presenting with STEMI or in cardiogenic shock (67.1% and 70.0%). The proportion of patients treated with PCI increased from 19.8% in 2010-2015 to 42.7% in 2016-2020. There was no significant difference in survival between the PCI and CABG-groups (p=0.41). CONCLUSIONS: In patients with LMCAD the main factors determining treatment choice are age, anatomical complexity and acuteness. There has been a significant increase in LMCAD patients treated with PCI.

[Impact of renal dysfunction on early outcomes of coronary artery bypass grafting surgery].

INTRODUCTION: Impaired renal function as seen in chronic kidney disease (CKD) is a known risk factor for coronary artery diseases and has been linked to inferior outcome after myocardial revascularization. Studies on the outcome of coronary bypass grafting (CABG) in CKD-patients are scarce. We aimed to study this subgroup of patients following CABG in a well defined whole-nation cohort, focusing on short term complications and 30 day mortality. MATERIALS AND METHODS: A retrospective study on 2300 consecutive patients that underwent CABG at Landspítali University Hospital 2001-2020. Patients were divided into four groups according to preoperative estimated glomerular filtration rate (GFR), and the groups compared. GFR 45-59 mL/mín/1.73m2, GFR 30-44 mL/mín/1.73m2, GFR <30 mL/mín/1.73m2 and controls with normal GFR (≥60 mL/mín/1.73m2). Clinical information was gathered from medical records and logistic regression used to estimate risk factors of 30-day mortality. RESULTS: Altogether 429 (18.7%) patients had impaired kidney function; these patients being more than six years older, having more cardiac symptoms and a higher mean EuroSCORE II (5.0 vs. 1.9, p<0.001) compared to controls. Furthermore, their left ventricular ejection fraction was also lower, their median hospital stay extended by two days and major short-term complications more common, as was 30 day mortality (24.4% vs. 1.4%, p<0.001). In multivariate analysis advanced age, ejection fraction <30% and GFR <30 mL/min/1.73m2 were independent predictors of higher 30-day mortality (OR=10.4; 95% CI: 3.98-25.46). CONCLUSIONS: Patients with impaired renal function are older and more often have severe coronary artery disease. Early complications and 30-day mortality were much higher in these patients compared to controls and advanced renal failure and the strongest predictor of 30-day mortality.