Evaluation of electrocardiogram findings and inflammatory parameters in patients with benign paroxysmal positional vertigo.

OBJECTIVE: Benign Paroxysmal Positional Vertigo (BPPV) is a common vestibular disorder characterized by brief episodes of intense vertigo, often accompanied by nausea and nystagmus. The frontal QRS-T (fQRS-T) angle, a novel indicator of ventricular depolarization and repolarization heterogeneity, has garnered attention due to its potential to reveal insights into cardiac function. This study aimed to investigate the potential relationship between the fQRS-T angle and inflammation markers in individuals with BPPV. PATIENTS AND METHODS: The study encompassed 49 BPPV patients and 51 healthy individuals as a control group. Laboratory assessments were conducted to measure inflammation parameters. Electrocardiogram (ECG) data was analyzed, focusing on conduction parameters including fQRS-T angle, QRS duration, QT interval, and corrected QT interval. RESULTS: The study revealed that the fQRS-T angle was significantly higher in BPPV patients compared to the control group (p<.001). Moreover, inflammation markers such as the neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), monocyte-to-lymphocyte ratio (MLR), and C-reactive protein-to-albumin ratio (CAR) were notably elevated in BPPV patients (p<.001, for all). The findings of the correlation analysis demonstrated a strong association between NLR and the fQRS-T angle (r=.718, p<.001). Additionally, the results of the linear regression analysis indicated that NLR positively predicted the fQRS-T angle (p<.001). CONCLUSIONS: The study's outcomes have underscored a significant increase in the fQRS-T angle among BPPV patients, suggesting altered ventricular repolarization dynamics. The strong correlation between NLR and the fQRS-T angle raises intriguing possibilities of inflammation's potential role in influencing cardiac electrophysiology. The study contributes to the growing body of evidence suggesting that BPPV might have implications beyond its immediate vestibular manifestations.

Evaluation of index of cardiac electrophysiological balance in COVID-19 patients.

AIM: The aim of the current study was to evaluate the index of Cardiac Electrophysiological Balance (iCEB) in hospitalized COVID-19 patients receiving Hydroxychloroquine / azithromycin (HCQ / AZ) combination therapy to determine the susceptibility to ventricular arrhythmia among these patients. METHOD: Sixty-seven COVID-19 patients admitted to the ward were included in the study. Electrocardiograms (ECGs) were obtained from all patients before the initiation of treatment and on treatment day 5. QT/QRS (iCEB) and QTc/QRS (iCEBc) ratios were calculated. RESULTS: QRS, QT and QTc intervals were significantly prolonged on day 5 measurements compared to pre-treatment period (p <0.05). Overall, mean iCEB was 3.6±0.4 before treatment and 3.8±0.4 on day 5 in the study population (p <0.001). Considering the iCEBc values, a significant increase was observed in patients receiving HCQ/AZ treatment compared to pre-treatment period (4.1±0.5 vs 4.4±0.6; p <0.001). CONCLUSIONS: To the best of our knowledge, this was the first study to investigate iCEB and iCEBc parameters in patients with COVID-19 on HCQ/AZ therapy. In this study, we demonstrated significantly increased iCEB and iCEBc values following HCQ/AZ treatment in COVID-19 patients. iCEB and iCEBc may serve as a noninvasive, simple, and novel biomarker for detecting increased pro-arrhythmia risk in COVID-19 patients (Tab. 3, Fig. 3, Ref. 36).

The relationship between electrocardiographic findings and left ventricular apical thrombus.

OBJECTIVE: Persistent ST segment elevation, fragmented QRS (fQRS), and prominent R wave in lead aVR (Goldberger sign) are the parameters associated with ventricular aneurysm. The goal of this report was to examine the association with electrocardiographic findings (persistent ST elevation, QRS duration, LBBB, and Fragmented QRS [fQRS]) and LV apical thrombus in subjects following anterior MI. PATIENTS AND METHODS: The study was a prospective and cross-sectional analysis that comprised of 220 consecutive subjects diagnosed after anterior MI. The echocardiographic features of patients were evaluated at least 6 weeks after anterior MI. A 12-point ECG was collected on all subjects admitted to the hospital. LBBB, persistent ST elevation, QRS duration and fQRS were evaluated in these patients. RESULTS: The LV ejection fraction (LVEF) was lower in the thrombus group compared to the non-thrombus group (27.2 ± 7.1/33.2 ± 10.0, p=0.008).  In patients with LV apical thrombus (LVAT); LBBB, persistent ST elevation, QRS duration and fQRS were higher compared to those without LVAT (p<0.05). CONCLUSIONS: We demonstrated that the electrocardiographic findings (persistent ST elevation, QRS duration, LBBB, and fQRS) were closely associated with LVAT, and these findings were used as indicators of LV thrombi in anterior MI patients.

Procalcitonin is a predictor of disseminated intravascular coagulation in patients with fatal COVID-19.

OBJECTIVE: The coagulopathies that present with COVID-19 are thrombotic microangiopathy and disseminated intravascular coagulopathy (DIC). Procalcitonin (PCT) levels have been shown to be significantly increased in COVID-19 patients in comparison with healthy subjects/asymptomatic coronavirus-positive patients. In this report, our aim was to assess the associations of the PCT level with DIC and the severity of COVID-19 infection. PATIENTS AND METHODS: In this cross-sectional, retrospective study, 71 consecutive patients with severe COVID-19 (21 with DIC and 50 without DIC) were enrolled in the study. The PCT level was obtained from hospital records. RESULTS: The PCT level was significantly higher in the patients with DIC than in those without DIC [1.9 (0.6-14.5) vs. 0.3 (0.2-0.4) (ng/mL), p<0.01]. The PCT level showed a positive and significant correlation with DIC (r=0.382, p=0.001) and was an independent predictor of DIC in patients with severe COVID-19 (OR: 6.685, CI: 1.857-24.063, p<0.01). CONCLUSIONS: In summary, the PCT level was increased in severe COVID-19 patients with DIC compared with those without DIC. An increased PCT level might suggest the presence of DIC and may help in predicting COVID-19 severity.

Predictors of major adverse cardiovascular events; results of population based MELEN study with prospective follow-up.

OBJECTIVE: In healthy persons, cardiovascular risk is the result of multiple interacting risk associates including demographic, clinical, genetic and environmental factors. Several non-invasive tools such as echocardiography, ultrasonography and electrocardiography as well as new biochemical markers were shown to be applicable to predict cardiovascular events. However, implementation of all of these tools has not been tested before. The aim of the study was to evaluate the independent predictors of major adverse cardiovascular events in a prospective population based study, with the use of bioempedance analysis, echocardiography, ultrasonography and ECG. PATIENTS AND METHODS: The baseline measurements were conducted on 2230 participants (1427 women, 803 men with a mean age of 49 ± 15). The follow-up was done 36 months after the baseline admission via telephone call. Major adverse event was defined as mortality or myocardial infarction or stroke. RESULTS: Follow-up data was possible in 1495 participants (65%). During the follow-up of 36 months (4485 patient years), 42 major adverse events occurred (0.03%). Among them, 16 were death (1 stroke, 2 cancer, 13 cardiac related), 12 were stroke and 14 were myocardial infarction. Age, body mass index and atrial fibrillation were independent predictors of major adverse events; AF being the most powerful (Odds ratio 10.46; 95% confidence interval [1.73-63.14]; p = 0.010). CONCLUSIONS: Age, lower body mass index and atrial fibrillation were independent predictors of major cardiovascular events in our cohort.