Electrocardiogram Changes Research Articles

Assessment of cardiac parameters after the administration of nicorandil before primary percutaneous coronary intervention.

To assess cardiac troponin I and creatine kinase-myocardial band levels, electrocardiogram changes and major adverse cardiac events after treatment with nicorandil before primary percutaneous coronary intervention. The comparative, analytical study was conducted from October to November 2022 at the Pharmacology Department of Army Medical College, National University of Medical Sciences, Rawalpindi, Pakistan, in collaboration with the Rawalpindi Institute of Cardiology, Rawalpindi. The sample comprised ST-elevated myocardial infarction patients of either gender aged at least 30 years with an ejection fraction of at least 35% undergoing primary percutaneous coronary intervention. Participants were selected based on the above-mentioned inclusion and informed consent was taken before their enrolment in this research study. The sample was randomised into control group A receiving conventional acute coronary syndrome treatment, and intervention group B receiving nicorandil in addition to the conventional treatment. Cardiac troponin I and creatine kinase-myocardial band levels, electrocardiogram changes, and major adverse cardiac events noted and compared. Data was analysed using SPSS 26. Of the 140 patients, 70(50%) were in each of the 2 groups. In group B, 60(85.7%) patients achieved a completely settled ST segment on electrocardiogram compared to 25(35.7%) in group A (p=0.001). There was a significant inter-group difference with respect to cardiac troponin I value 6 hours after percutaneous coronary intervention and major adverse cardiac events (p<0.05), but creatine kinase-myocardial band level was no significantly different between the groups (p=0.761). Prophylactic use of nicorandil in ST-elevated myocardial infarction patients decreased the incidence of reperfusion injury.

Semaglutide attenuates pathological electrophysiological remodeling in diabetic cardiomyopathy via restoring Cx43 expression.

Semaglutide is a relatively new anti-hyperglycemic agent that was shown to carry cardioprotective potentials. However, the exact effects of semaglutide on diabetic cardiomyopathy (DCM) and their underlining mechanism remain unclear. This study aimed to evaluate the effects of semaglutide on myocardium injury and cardiac function in DCM mice and its potential mechanisms, with emphasis on its effects on Cx43 and electrophysiological remodeling. C57BL/6 mice were randomly divided into four groups: control group, semaglutide group, diabetes group, and diabetes + semaglutide treatment group. Type 1 diabetes were induced by intraperitoneal injection of streptozotocin. Mice in the semaglutide intervention group were injected subcutaneously with semaglutide (0.15 mg/kg) every week for 8 weeks. The blood glucose, cardiac function, oxidative stress markers, apoptosis, expression of Sirt1, AMPK, Cx43, and electrocardiogram of mice in each group were evaluated. Treatment with semaglutide alleviated glucose metabolism disorders and improved cardiac dysfunction in diabetic mice. In addition, semaglutide ameliorated the increase in oxidative stress and apoptosis in diabetic heart. Sirt1/AMPK pathway was activated after semaglutide treatment. Furthermore, diabetic mice showed reduced expression of Cx43 in the myocardium, accompanied by changes in electrocardiogram, including significantly prolonged RR, QRS, QT and QTc interval. Semaglutide treatment restored Cx43 expression and reversed the above-mentioned ECG abnormalities. Our research results showed that semaglutide protected against oxidative stress and apoptosis in diabetic heart, thereby improving cardiac function and electrophysiological remodelling in DCM mice, which may attribute to activation of Sirt1/AMPK pathway and restore of Cx43 expression.

Digital precision medicine in rhythmology : Risk prediction of recurrences, sudden cardiac death, and outcome

Digital precision medicine is gaining increasing importance in rhythmology, especially in the treatment of cardiac arrhythmias. This trend is driven by the advancing digitization in healthcare and the availability of large amounts of data from various sources such as electrocardiograms (ECGs), implants like pacemakers and implantable cardioverter-defibrillators (ICDs), as well as wearables like smartwatches and fitness trackers. Through the analysis of this data, physicians can develop more precise and individualized diagnoses and treatment strategies for patients with cardiac arrhythmias. For example, subtle changes in ECGs can be identified, indicating potentially dangerous arrhythmias. Genetic analyses and resulting large datasets also play an increasingly significant role, especially in hereditary ion channel disorders such as long QT syndrome (LQTS) and Brugada syndrome (BrS), as well as in lone atrial fibrillation (AF). Precision medicine enables the development of individualized treatment approaches tailored to the specific needs and risk factors of each patient. This can help improve screening strategies, reduce adverse events, and ultimately enhance the quality of life for patients. Technological advancements such as big data, artificial intelligence, machine learning, and predictive analytics play acrucial role in predicting the risk of arrhythmias and sudden cardiac death. These concepts enable more precise and personalized predictions and support physicians in the treatment and monitoring of their patients.

Factors Influencing Electrocardiogram Pattern in Children and Adolescents: A Systematic Review for Future Research

An electrocardiogram (ECG) is a diagnostic tool that can identify heart conditions and offer valuable information about electrical activity and age-related changes. Our primary concern is studying ECG changes related to age, gender, and body mass index (BMI) for the benefit of researchers and clinicians. A comprehensive search for relevant literature was conducted in the PubMed, Embase, and Scopus databases. The selection criteria were limited to original papers published between January 1, 2015, and December 31, 2022, that were deemed eligible. We executed a meticulous selection process that involved eliminating duplicates, screening abstracts and full texts, and manually adding some articles. During the full-text screening process, we excluded articles that were not relevant to our study. Ultimately, we included only nine observational studies that fulfilled our eligibility criteria. Our primary objective was to determine the factors that influence the ECG pattern in children and adolescents. This review systematically highlights the significance of identifying ECG patterns that could be correlated to factors such as age, gender, and BMI. Identifying such patterns may play a crucial role in improving the diagnostic accuracy of ECG. Physicians who fail to recognize these patterns may mistakenly endanger their patients’ lives.

Using explainable AI to investigate electrocardiogram changes during healthy aging-From expert features to raw signals.

Cardiovascular diseases remain the leading global cause of mortality. Age is an important covariate whose effect is most easily investigated in a healthy cohort to properly distinguish the former from disease-related changes. Traditionally, most of such insights have been drawn from the analysis of electrocardiogram (ECG) feature changes in individuals as they age. However, these features, while informative, may potentially obscure underlying data relationships. In this paper we present the following contributions: (1) We employ a deep-learning model and a tree-based model to analyze ECG data from a robust dataset of healthy individuals across varying ages in both raw signals and ECG feature format. (2) We use explainable AI methods to identify the most discriminative ECG features across age groups.(3) Our analysis with tree-based classifiers reveals age-related declines in inferred breathing rates and identifies notably high SDANN values as indicative of elderly individuals, distinguishing them from younger adults. (4) Furthermore, the deep-learning model underscores the pivotal role of the P-wave in age predictions across all age groups, suggesting potential changes in the distribution of different P-wave types with age. These findings shed new light on age-related ECG changes, offering insights that transcend traditional feature-based approaches.

Comparison of nebulisation 0.75% ropivacaine with 2% lignocaine for attenuation of haemodynamic response due to intubation: A prospective randomised study.

Laryngoscopy and intubation are associated with the reflex response of hypertension, tachycardia and other intraoperative complications. Nebulised route drug administration and entropy-guided induction enable optimal intubating conditions. To compare pre-induction nebulisation between 0.75% ropivacaine and 2% lignocaine in blunting the nasotracheal intubation response. A total of 100 patients undergoing elective faciomaxillary surgeries were prospectively randomised to receive pre-induction nebulisation: 5mL of 2% lignocaine (100mg) (Group L) or 5mL of 0.75% ropivacaine (37.5mg) (Group R). Patients were induced and intubated (nasotracheal) with entropy monitoring. Observed parameters included systolic blood pressure, diastolic blood pressure, mean arterial pressure, heart rate, entropy at baseline, induction, intubation, post-intubation one, three and five minutes, propofol induction dose, electrocardiogram changes and peri-intubation cough reflex. Ropivacaine aerosol proved significantly better than lignocaine aerosol on haemodynamics (systolic blood pressure, diastolic blood pressure, mean arterial pressure, heart rate) and cough reflex (p < 0.05). Both groups experienced similar entropy changes and propofol induction dose requirements and no fresh electrocardiogram changes (compared with the baseline). Pre-induction nebulised ropivacaine offers superior intubating conditions than lignocaine regarding haemodynamic response and cough reflex for faciomaxillary surgeries.

Comparison of Baseline and Post-Nitrate Exercise Testing in Patients with Angina but Non-Obstructed Coronary Arteries with Different Acetylcholine Test Results.

Background: Intracoronary acetylcholine testing may induce epicardial coronary artery spasm (CAS) or coronary microvascular spasm (CMVS) in patients with angina syndromes but non-obstructive coronary artery disease, but their causal role in individual patients is not always clear. In this prospective, observational single-center study, we aimed to assess whether (1) the induction of myocardial ischemia/angina by electrocardiogram (ECG) exercise stress test (EST) differs between patients showing different results in response to acetylcholine testing (i.e., CAS, CMVS, or no spasm); (2) the preventive administration of short-acting nitrates has any different effects on the EST of those patients who showed a positive basal EST. We expected that if exercise-induced angina and/or ischemic ECG changes are related to CAS, they should improve after nitrates administration, whereas they should not significantly improve if they are caused by CMVS. Methods: We enrolled 81 patients with angina syndromes and non-obstructive coronary artery disease, who were divided into three groups according to acetylcholine testing: 40 patients with CAS (CAS-group), 14 with CMVS (CMVS-groups), and 27 with a negative test (NEG-group). All patients underwent a basal EST (B-EST). Patients with a positive B-EST repeated the test 24-48 h later, 5 min after the administration of short-acting nitrates (N-EST). Results: There were no significant differences among the groups in terms of the B-EST results. B-EST was positive in eight (20%) patients in the CAS-group, seven (50%) in the CMVS-group, and six (22%) in the NEG-group (p = 0.076). N-EST, performed in eight, six, and five of these patients, also showed similar results in the three groups. Furthermore, the N-EST results also did not significantly differ compared to B-EST in any group, remaining positive in seven (87.5%), four (66.7%), and four (80%) patients in the CAS-group, CMVS-group, and NEG-group, respectively (p = 0.78). Conclusions: Our data show that patients with angina and non-obstructive coronary artery disease show largely comparable results of the ECG exercise stress test and similar poor effects of short-acting nitrates on abnormal ECG exercise stress test results. On the whole, our findings suggest caution in attributing to the results of Ach testing a definite causal role for the clinical syndrome in individual patients.

Early Post-operative ECG Changes as a Predictor of Post-pericardiotomy Syndrome Following Atrial Septal Defect Repair

To identify risk factors associated with post-pericardiotomy syndrome (PPS) in patients undergoing surgical repair of atrial septal defects (ASD). A single-center retrospective study. Tertiary academic hospital. Included were patients of all ages who underwent surgical ASD repair, while exclusion criteria included the absence of post-operative electrocardiogram (ECG), lack of follow-up post-discharge and factors hindering ECG interpretation. Demographic and clinical data, including ECG changes indicative of pericardial inflammation, were collected. The primary outcome measure was the development of PPS, determined based on the standardized European Society of Cardiology (ESC) criteria. Among 190 patients who underwent surgical ASD repair, 154 (81%) met the inclusion criteria. Of these, 25 (16%)in total developed PPS, of which 60% were ≥ 18 years of age and 56% female. Significant associations relating both early ECG changes and pre-discharge pericardial effusion with subsequent occurrence of PPS were found in both univariate and multivariate analyses. The study establishes correlations of both early post-operative ECG changes indicative of inflammation and pre-discharge pericardial effusion with subsequent occurrence of PPS in patients undergoing surgical ASD repair. Both utilizing the standardized ESC definition of PPS and incorporating a physician-validated ECG evaluation strengthened the methodologic approach in establishing these relationships. The results also highlight the importance of considering age as a potential risk factor for PPS. Further research is needed to validate these findings and explore additional risk factors predicting early identification and management of patients at high risk for PPS following surgical ASD repairs.

The “Spiked Helmet Sign”, a Mimic of ST-Elevation Myocardial Infarction in Post-Nephrectomy Ileus

There are many causes of ST-elevation on electrocardiogram (ECG). ECG changes in the setting of intra-abdominal pathology is a rare and under characterised and includes the “spiked helmet sign”. We report a rare case of the “spiked helmet sign” that presented with ST-elevation in the precordial leads due to post-operative ileus.

Effect of loperamide on heart rhythm: Randomized, double-blind, controlled study in healthy adults

BackgroundExcessively high doses of loperamide (of up to 792 mg/day) have recently been associated with reports of cardiac events. However, no data currently demonstrate a direct effect of high doses of loperamide on the occurrence of cardiovascular abnormalities. ObjectivesThis study aimed to assess the effects of loperamide on QT/corrected QT (QTc) intervals, electrocardiogram (ECG) morphology, and overall safety and tolerability at therapeutic and supratherapeutic exposures in healthy adults. MethodsThis randomized, double-blind, 4-way-crossover study enrolled 65 healthy adults to receive loperamide 8 mg (therapeutic dose), loperamide 48 mg (supratherapeutic dose), moxifloxacin 400 mg (positive control), and placebo. Least square (LS) mean difference in change from baseline in Fridericia-corrected QT (ΔQTcF) intervals between loperamide (8 mg and 48 mg) and placebo with the 2-sided 90% CI was calculated for each time point. A noninferiority criterion of mean difference in ΔQTcF of 10 ms evaluated whether loperamide was noninferior to placebo. Treatment safety was assessed throughout the study. ResultsMost participants were female (66.2%) and white (95.4%). The age was 36.4 years (SD 9.77). The highest upper limit of the 2-sided 90% CI for LS mean difference in ΔQTcF between loperamide and placebo was 3.39 ms for the therapeutic dose and 9.28 ms for the supratherapeutic dose of loperamide, which were below the 10 ms threshold, thereby demonstrating noninferiority of loperamide to placebo. There were no statistically significant morphologic ECG changes after loperamide administration. There were no deaths, serious adverse events, or severe treatment-emergent adverse events. ConclusionSingle-dose loperamide at therapeutic (8 mg) and supratherapeutic (48 mg) doses do not show evidence of QTc prolongation of clinical concern in healthy participants. No new safety findings were identified.

Electrocardiographic characteristics in chronic obstructive pulmonary disease patients: An observational study

Abstract Background: Chronic obstructive pulmonary disease (COPD) is the fourth leading cause of death worldwide. It causes alteration in the cardiac performance that can be recorded by electrocardiogram (ECG) and echocardiography noninvasively. Methods: In this observational study, we studied ECG changes and their relation with the disease severity and disease duration amongst 100 COPD patients. Results: Their mean age was 58.1 ± 12.0 years, and the mean disease duration was 7.9 ± 4.1 years. ECG was found normal in 31% and abnormal in 69% of subjects. Right axis deviation (RAD), right ventricular hypertrophy, right bundle branch block and P-pulmonale were noted in 38%, 28%, 20% and 17% of study subjects, respectively. Left bundle branch block, ventricular premature contractions (VPC) and second and third-degree block were seen in none of the subjects. ECG was found abnormal in 78% of patients with Stage 4 COPD, whereas only 17% of patients with Stage 1 COPD had their ECGs abnormal (P &lt; 0.01). ECG was abnormal in 91% of patients with a disease duration of more than 10 years and 39% of patients with a disease duration of &lt;5 years (P &lt; 0.001). Conclusions: RAD appeared to be the most common ECG finding in patients with COPD. Patients with advanced disease and longer disease duration have a high risk for ECG to be abnormal.

Acute Pericarditis Manifesting as Persistent Chest Pain Following Primary Percutaneous Coronary Intervention: A Missed Diagnosis

Percutaneous coronary intervention (PCI) is a very rare cause of acute pericarditis. It usually develops after a latent period but can present early in case of procedural complications. A high degree of suspicion is required for diagnosis as most cases can be easily missed. Here, we highlight a case of 54-year-old admitted as a case of non-ST elevated myocardial infarction who in view of ongoing chest pain underwent urgent coronary angiography, followed by the primary PCI to left anterior descending artery after which the patient became pain-free. However, 12 h after the procedure, the patient developed severe persistent chest pain with positional and respiratory variation. He was suspected to have reinfarction and treated accordingly but had no symptomatic improvement and was planned for check angiography. However, based on dynamic electrocardiogram (ECG) changes, new echocardiographic findings aided laboratory parameters, he was diagnosed with acute pericarditis. He was treated with nonsteroidal anti-inflammatory drugs following which his pain resolved and ECG returned to baseline after 4 days. His follow-up echocardiography showed complete resolution of pericardial effusion. This case highlights the importance of keeping acute pericarditis as a differential diagnosis of chest pain in PCI patients. A high degree of suspicion is required, as most cases are easily missed to diagnose.

The impact of early gastroscopy examination on cardiovascular event-related indices in elderly patients with acute upper gastrointestinal bleeding.

To observe the effects of early gastroscopy examination on cardiovascular event-related indicators such as heart rate (HR), blood pressure, and electrocardiogram (ECG) in elderly patients with acute upper gastrointestinal bleeding. Sixty patients with upper gastrointestinal bleeding admitted from July 2022 to December 2022 were selected. Patients with relevant contraindications were excluded. All patients underwent early gastroscopy examination. Among them, 30 patients were aged 60 or above (elderly group) and 30 patients were aged below 60 (non-elderly group). Dynamic blood pressure and ECG recordings were obtained before, during, and after gastroscopy examination to assess changes in HR, blood pressure, and ECG. The HR and blood pressure levels of the elderly group were significantly lower than those of the non-elderly group before, during, and after gastroscopy examination (P < .05). In the elderly group, blood pressure and HR were higher during gastroscopy examination compared to before, but lower than during the examination afterward, with statistically significant differences (P < .05). The diastolic blood pressure was lower after the examination compared to before, with statistical significance, while the systolic blood pressure was lower, and the HR was higher after the examination, but without statistical significance (P > .05). In the non-elderly group, systolic blood pressure and HR were higher during gastroscopy examination compared to before, with statistically significant differences (P < .05), while diastolic blood pressure was higher but without statistical significance (P > .05). Blood pressure and HR were lower after the examination compared to during, with statistically significant differences (P < .05). The occurrence rates of ECG changes were 70% in the elderly group and 30% in the non-elderly group, with a statistically significant difference (χ2 = 5.45, P = .02 < .05). Early gastroscopy examination in elderly patients with gastrointestinal bleeding did not result in severe cardiovascular adverse events and was relatively safe. However, special attention should be given to the occurrence of cardiac arrhythmias.

Pre-Excited Atrial Fibrillation in Wolff-Parkinson-White (WPW) Syndrome: A Case Report and a Review of the Literature.

Wolff-Parkinson-White (WPW) syndrome is defined by specific electrocardiogram (ECG) changes resulting in ventricular pre-excitation (the so-called WPW pattern), related to the presence of an accessory pathway (AP), combined with recurrent tachyarrhythmias. WPW syndrome is characterized by different supraventricular tachyarrhythmias (SVT), including atrioventricular re-entry tachycardia (AVRT) and atrial fibrillation (AF) with rapid ventricular response, with AVRT being the most common arrhythmia associated with WPW, and AF occurring in up to 50% of patients with WPW. Several mechanisms might be responsible for AF development in the WPW syndrome, and a proper electrocardiographic interpretation is of pivotal importance since misdiagnosing pre-excited AF could lead to the administration of incorrect treatment, potentially inducing ventricular fibrillation (VF). Great awareness of pre-excited AF's common ECG characteristics as well as associated causes and its treatment is needed to increase diagnostic performance and improve patients' outcomes. In the present review, starting from a paradigmatic case, we discuss the characteristics of pre-excited AF in the emergency department and its management, focusing on the most common ECG abnormalities, pharmacological and invasive treatment of this rhythm disorder.

Defibrillator Lead Perforation Leading to Concerning Electrocardiogram Findings: Case Report.

Implantable cardioverter-defibrillator (ICD) lead perforation through the myocardium may result in chest pain and electrocardiogram (ECG) changes concerning for ST-segment elevation myocardial infarction. The clinical context of the ECG aids in appropriate management. We report the case of a 71-year-old woman experiencing chest pain after an ICD placement two weeks earlier. On presentation, she exhibited ST-segment elevation on her ECG. Computed tomography confirmed ICD lead migration. The patient's hemodynamics were normal, and she was discharged home after a five-day hospital stay following a lead revision. Although rare, ICD lead perforation is a potential cause of chest pain and ischemic ECG changes. Emergency physicians should consider lead perforation as a potential differential diagnosis when evaluating chest pain in patients with ICDs, taking into account the potential complications of coronary angiography.

The Association Between Components of Metabolic Syndrome and Abnormal Electrocardiograms in the Saudi Population: A Retrospective Study.

Saudi Arabia has a high metabolic syndrome (MetS) prevalence. Having MetS increases the risk of cardiovascular disease (CVD), CVD mortality, and myocardial infarction (MI). There is a lack of information regarding MetS and electrocardiogram (ECG) abnormalities in Saudi Arabian populations. Further, it is unclear to what extent MetS components are associated with abnormal ECGs in Saudi populations. We investigated whether ECG abnormalities and MetS are associated with Saudi adults. Furthermore, we assessed the relationship between ECG abnormalities and the components of MetS based on the age and gender of the individuals. Materials and methods: A retrospective study was conducted at Dr Soliman Fakeeh Hospital in Jeddah, Saudi Arabia, on 208 patients with MetS. Participants' clinical and laboratory data were examined. A detailed analysis of the ECG was performed. ECG abnormalities were divided into minor and major abnormalities based on Novacode criteria. In addition to ischemic ECG findings, the ECG showed prolonged PR intervals, prolonged P duration, prolonged QRS duration, and prolonged QTc intervals. Results: One hundred and thirty-seven participants (65.9%) had elevated fasting blood glucose (FBS), 129 had central obesity (62%), 93 had high blood pressure (BP) (44.7%), 74 had elevated triglycerides (35.6%), and 49 had low high-density lipoprotein (23.6%).An abnormal ECG was found in 86 (41.3%) participants. It consisted of ischemic ECGs, atrioventricular (AV) block (first and second degrees), bundle branch block (right bundle branch block [RBBB], left bundle branch block [LBBB], RBBB with left anterior hemiblock, RBBB with right anterior hemiblock), arrhythmias (premature ventricular contractions [PVCs], premature atrial complexes [PACs], atrial fibrillation [AF], sinus bradycardia, sinus arrhythmia), prolonged QTc, prolonged PR interval, and prolonged QRS duration. There were 29 (13.9%) cases with multiple ECG abnormalities, 57 (27.4%) had one abnormal ECG, 42 (20.2%) had minor abnormal ECGs, and 44 (21.2%) had major abnormal ECGs. Middle-aged and elderly males accounted for the majority of these ECG changes. In the central obesity group, 22 participants (10.6%) had ischemic ECGs, 18 (8.7%) had prolonged QTc, 10 (4.8%) had first-degreeAV block, 6 (2.9%) had sinus bradycardia, 7 (3.4%) had RBBB, 4 (1.9%) had LBBB, 3 (1.4%) had PVCs, 2 (1%) had ventricular preexcitation, and one (0.5%) had PACs. An elevated FBS group included 19 participants (9.1%) with an ischemic ECG, 18 (8.7%) with a prolonged QTc, 11 (5.3%) with a first-degreeAV block, 9 (4.3%) with sinus bradycardia, 6 (2.9%) with slight ST-T abnormality, 5 (2.4%) with RBBB, and 5 (2.4%) with LBBB. Finally, one (0.5%) of these patients had second-degreeAV block, RBBB with left anterior hemiblock, left anterior hemiblock, PVCs, AF, ventricular preexcitation, and sinus arrhythmia for each. Saudi Arabian populations with MetS were strongly associated with abnormal ECG findings, particularly ischemic ECG findings, AV block (firstand second degrees), and BBB (RBBB, LBBB). Middle-aged and elderly males accounted for the majority of these ECG changes. The most important factors contributing to ECG changes were elevated FBS and central obesity.

Abstract P299: Alteration of Cardiac Autonomic Function Through Inhalation of Biogenic Volatile Organic Compounds

Background: There is an inverse relationship between exposure to greenspaces and prevalence of cardiovascular disease and cardiovascular disease risk factors. More specifically, green exposure is associated with electrocardiogram (ECG) changes, suggesting a potential alteration of cardiac autonomic balance. One proposed mechanism by which cardiac autonomic balance may be altered is a direct physiologic effect of inhalable plant derived compounds, or biogenic volatile organic compounds (bVOCs), including limonene, α- and β-pinene which are commonly released from vegetation. Therefore, we examined the relationship between acute exposure of isolated bVOCs and cardiac autonomic tone. Hypothesis: We hypothesize that controlled exposure to isolated individual bVOCs will decrease cardiac sympathetic tone. Methods: Under controlled conditions after a bVOC washout period, healthy adults ages 18-70 were exposed to limonene (n=32), α-pinene (n=24), β-pinene (n=17), and a control (room air, n=9). Exposure consisted of one inhalation every 30 seconds for a total of 5 minutes (10 inhalations total). Pre- and post-exposure measurements of supine heart rate variability (HRV) were conducted following a 10-minute rest period. HRV was analyzed using a clean, 5-minute epoch with &gt;95% effective data length. Statistical analysis was performed using paired t-tests to determine changes in HR and HRV. Significance level was set at p&lt;0.05, a priori . Results: Our population was primarily female (56%, 18 of 32), white (53%, 17 of 32), high income (47%, 15 of 32), and had an education higher than a 4-year degree (62.5%, 20 of 32). There were significant decreases in HR when exposed to limonene (pre: 64.87±9.86bpm vs. post: 63.26±9.10bpm, p&lt;.001) and α-pinene (pre: 63.98±9.32bpm vs. post: 61.64±9.72bpm, p=.008), along with trends seen in β-pinene (pre: 65.78±10.60bpm vs. post: 63.74±9.65bpm, p=.066). Control exposure showed no difference (pre: 65.40±8.38bpm vs. post: 64.14±9.35bpm, p=.301). Normalized low- (LF) and high-frequency (HF) HRV parameters showed no change across isolated bVOCs, however the LF/HF ratio scores decreased significantly following β-pinene exposure (pre: 1.62±1.69 vs. post: 0.96±0.96, p=.039). HRV time-domain parameters RMSSD and SDNN did not change following isolate exposure. Conclusions: Post-exposure decreases in HR and LFHF ratios indicate the potential for cardiovascular disease risk reduction from bVOC exposure leading to decreased sympathetic tone. Additional work is required to determine the mechanism of exposure-related changes.

Transport decisions: acute coronary syndrome and high-risk electrocardiograms

Patients experiencing a high-risk non-ST-elevation myocardial infarction are likely to benefit from prehospital medical contact, transport to a percutaneous coronary intervention (PCI) centre and early definitive treatment. They may be provisionally diagnosed through the identification of a high-risk electrocardiogram (ECG). Advances in ECG interpretation have led to the identification of a cohort of at-risk patients whose treatment may previously have been delayed. Patients with certain ECG changes are considered high risk and may be experiencing coronary occlusions. Early PCI and direct transport to a PCI-capable hospital are associated with a reduction in mortality and morbidity; this is associated with a lower financial burden on the health service. Early paramedic identification of these high-risk ECGs and appropriate transport decision-making can positively influence patient outcomes. High-risk ECGs include those that are positive for the modified Smith-Sgarbossa criteria, DeWinter T waves, Wellens syndrome, posterior acute myocardial infarction and aVR elevation. Continued education is correlated with more accurate ECG interpretation.

Application Value of Serum Cardiac Troponin T, Brain Natriuretic Peptide Levels and Electrocardiogram Changes in the Treatment and Prognosis Evaluation of Severe Pneumonia in Children.

To explore the application of serum cardiac troponin T (cTnT), brain natriuretic peptide (BNP) levels, and electrocardiogram changes in the treatment and prognosis evaluation of severe pneumonia in children. 120 children with severe pneumonia (severe group) admitted to our hospital from June 2020 to December 2022 were selected as the study subjects with prospective study. They were divided into survival group (n=78) and death group (n=42) based on their survival status; 120 children with mild pneumonia were selected as the control group. Compare the levels of serum cTnT and BNP, as well as the changes in electrocardiogram, to analyze their predictive value for the prognosis of pediatric patients and the influencing factors of prognosis. The proportion of children with cTnT, BNP, and abnormal electrocardiogram after treatment was lower than before treatment (P<0.05). The proportion of children with cTnT, BNP, and abnormal electrocardiogram in the severe group was higher than that in the mild group (P<0.05). The proportion of children with serum cTnT, BNP levels, and abnormal electrocardiogram in the death group after treatment was higher than that in the survival group (P<0.05). Bundle branch block, low or inverted T waves, cTnT, and BNP are prognostic factors for children with severe pneumonia (P<0.05). The combined prediction of serum cTnT and BNP for the prognosis of severe pneumonia in children is better than that of single prediction (Z combined detection - cTnT=2.474, Z combined detection - BNP=2.494, P=0.013, 0.013). The proportion of abnormal cTnT, BNP, and electrocardiogram is increased in patients with severe pneumonia, and those with high expression and abnormalities have poor prognosis. cTnT and BNP have high predictive value for the prognosis of children with severe pneumonia.

ECG pattern among adult patients on antipsychotic medications at the university of port Harcourt teaching hospital, River State, Nigeria

Background: Antipsychotic medications treat neuropsychiatric disorders like Schizophrenia and Bipolar disorder. Despite their symptom management benefits, they carry cardiovascular risks. Electrocardiogram (ECG) monitoring is crucial for detecting abnormalities. This research aims to identify and understand these risks, aiding healthcare professionals in implementing effective monitoring for better patient outcomes. Methods: A retrospective study on subjects who are patients on Antipsychotic medications from the University of Port Harcourt Teaching Hospital (UPTH). Results: In a study with 100 patients on antipsychotic medications, 68% displayed abnormal ECG changes during treatment, while 32% had normal patterns. Left Ventricular Hypertrophy (LVH) and Atrial Enlargements were common, affecting 30% and 26% respectively, while QT interval prolongation was rare (2%). Risperidone, Sodium Valproate, and Trihexyphenidyl showed the most abnormal ECG changes, whereas Olanzapine, Fluoxetine, and Escitalopram were relatively safer. Conclusion: ECG monitoring is an essential component of the management of patients on antipsychotic drugs. It enables the early detection of QT interval prolongation and other cardiac abnormalities, allowing for timely interventions and personalized treatment plans. Our study showed just 2% of the patient had QT interval prolongation, however Left Ventricular Hypertrophy was a common finding in the ECG of the patients, 30%.