Right-sided HF are recognized as the presence of one of normal periods (ankle lump) otherwise certain cues (jugular venous distention otherwise abdominojugular reflux) away from right HF
Fasting venous blood samples were drawn from the study participants and analyzed on the same day. Renal function was assessed using the estimated glomerular filtration rate (eGFR) https://datingranking.net/bisexual-dating/, calculated with the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) formula. Whole blood counts were determined using an automated blood cell counter. Anemia was defined as a hemoglobin level <12 g/dL in women and <13 g/dL in men. 14 Ferritin, vitamin B12, folic acid, and NT-proBNP levels were estimated by chemiluminescence using the Beckman Coulter Access Immunoassay Systems. Iron and iron binding capacity were measured with Roche Cobas C 702 System. Iron deficiency was defined as a serum ferritin level <100 ng/mL for absolute deficiency, and 100–299 ng/mL with a transferrin saturation <20% for functional iron deficiency. 4,5 The reference interval for vitamin B12 by the manufacturer was 180–914 pg/mL. Vitamin B12 deficiency was defined as <200 pg/mL, and folic acid deficiency was defined as <4.0 ng/mL. 15,16
Significant correlates regarding vitamin B12 were examined to your univariate linear regression model playing with every clinical, echocardiographic, and you can research variables because covariates
An endpoint of studies is actually the-end in mortality. Patients had been then followed-until of the outpatient visits or by the cellular phone contact whenever they were not able ahead getting check outs.
The analysis are approved by the organization remark panel of your Kocaeli School and you may was a student in accordance for the beliefs of your own Helsinki Statement. Written informed consent is taken from per patient before study range.
All analyses were performed using SPSS 20.0 statistical software package (IBM Corporation, Armonk, NY, USA). Continuous variables are presented as mean and standard deviation when normally distributed, and as median and 25th–75th percentiles when non-normally distributed. Categorical variables are given as percentages. Patient groups and controls were compared by Student’s t-test or Mann–Whitney U-test when appropriate. The chi-square test was used for the comparison of categorical variables. Variables with a significant univariable correlation (P<0.10) were entered in the multivariable linear regression model. Receiver operating characteristic curve (ROC) analysis was performed to assess the cut-off value of vitamin B12 for predicting all-cause mortality. The Kaplan–Meier method was used to determine cumulative probability of all-cause mortality according to serum vitamin B12 level, and the survival curves were compared by the log-rank test. Cox proportional hazard regression model, adjusted for age, gender, presence of right HF, coronary artery disease, angiotensin converting enzyme (ACE)-inhibitor/angiotensin receptor blocker, beta-blocker, mineralocorticoid receptor antagonist usage, atrial fibrillation, systolic blood pressure, sodium, eGFR, NT-proBNP, hs-CRP, direct bilirubin, serum B12, ejection fraction, left ventricular end-diastolic diameter, left atrial diameter, right ventricular diameter, and pulmonary artery systolic pressure, was used to determine the independent prognostic determinants of mortality. A two-sided P-value <0.05 was accepted as statistically significant.
Every article authors had full usage of all studies regarding the investigation, and you can grabbed responsibility towards stability of information and you can precision from analysis studies.
The study group consisted of 129 chronic stable HF patients and 50 healthy subjects. Baseline characteristics of the HF patients and controls are shown in Table 1. Mean NYHA functional class of the heart failure with reduced ejection fraction (HFrEF) patients was 2.7±0.4, and 71 of them (55%) had symptoms or signs of right HF. Anemia was present in 64 (49.6%) of the patients and in six (12%) of the controls (P<0.001). Most of the HFrEF patients had iron deficiency (108; 83.7%). Serum vitamin B12 deficiency was significantly less frequent in HFrEF patients compared to controls (35 patients [27%] vs 24 controls [48%] respectively; P=0.006), and folic acid deficiency was similar between the two groups (10 patients [8%] vs 1 control [2%]; P=0.184). A total of 43 patients (33%) had received an implantable cardioverter defibrillator and/or cardiac resynchronization therapy. Median B12 levels were not different between those who had and had not received a device therapy (245 pg/mL vs 272 pg/mL, respectively; P=0.680). On the contrary, B12 levels in HFrEF patients with and without right HF were significantly higher compared to controls (HFrEF with right HF: median 311 pg/mL [220–449], HFrEF without right HF: median 235 pg/mL [178–392]; P=0.022), and all five cases with a B12 level higher than 800 pg/mL were in the HFrEF group (Figure 1).