Circulation, Volume 150, Issue Suppl_1, Page A4145321-A4145321, November 12, 2024. Introduction:Pulmonary dysfunction is a risk factor for increased mortality in patients with acute coronary syndromes (ACS). The purpose of this study was to investigate the association between thrombogenicity and pulmonary function test abnormalities in patients with ACS.Methods:We included ACS patients who underwent successful percutaneous coronary intervention (PCI). Pulmonary function was assessed by spirometry based on the forced expiratory volume in one second (FEV1%pred) after PCI. Thrombogenicity was evaluated with the thromboelastography and conventional hemostatic measures.Results:Among 323 patients, 90 patients (28.8%) had pulmonary dysfunction (moderate or severe spirometric abnormality, FEV1%pred
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Abstract 4140796: Association Between the Severity of Coronary Artery Stenosis with the Minimum Responsive Dose of Intracoronary Acetylcholine Provocation Test
Circulation, Volume 150, Issue Suppl_1, Page A4140796-A4140796, November 12, 2024. BACKGROUND:Coronary artery spasm (CAS) is a cause of variant angina and is typically diagnosed by intracoronary acetylcholine (ACH) provocation test. Investigations regarding association between the severity of coronary artery stenosis and the minimum responsive dose of ACH required for provocation is limited.METHODS:In this study, 3,915 patients who underwent the acetylcholine (ACH) provocation test and showed CAS between October 2004 and December 2022 were enrolled. Significant CAS was defined as temporary narrowing of ≥70% during the ACH test. Patients were divided into three groups, based on the minimum responsive dose of ACH: A1 group (20ug, n=227), A2 group (50ug, n=1,366) and A3 group (100ug, n=2,322).RESULTS:In patients who were documented with positive intracoronary ACH provocation test, 5.8% responded at the lowest dose (20ug), 34.9% responded at the medium doses (50ug) and 59.3% responded only at the highest dose of ACH (100ug). The baseline characteristics of the patients among the 3 groups were similar, demonstrating no significant difference in the prevalence of hypertension, diabetes mellitus, and dyslipidemia. However, patients who responded at lower dose showed higher proportion of smokers (A1 37.9% vs. A2 35.7% vs. A3 31.0%, p=0.004). A1 group demonstrated the highest proportion of severe stenosis (63.0%), followed by A2 group (60.1%) and A3 group (47.4%) (Figure 1).CONCLUSION:In patients with chest pain with positive intracoronary ACH provocation test, severe stenotic lesions were found to be more frequent and more susceptible in patients who responded at lower doses of ACH.
Abstract 4146883: Analysis of Near-Infrared Spectroscopy Vascular Occlusion Test as a Complement to Ankle-Brachial Index and 6-Minute Walk Test in Patients Diagnosed with Peripheral Artery Disease
Circulation, Volume 150, Issue Suppl_1, Page A4146883-A4146883, November 12, 2024. Introduction:Peripheral arterial disease (PAD) is caused by a lack of blood flow to the musculature relative to its metabolism which results in pain. PAD impacts up to 20% of patients around the world. PAD involves macrovascular and microvascular dysfunction. Near-infrared spectroscopy (NIRS) measures muscle oxygenation levels and assesses microvascular function. The standard of care for diagnosing PAD is the ankle-brachial index (ABI), which assesses macrovascular disease, and the 6-minute walk test (6MWT), which measures gait speed and claudication. NIRS has the potential to monitor progression of PAD.Hypothesis:NIRS measurement of muscle oxygenation, during a standard test of vascular occlusion and post-occlusive hyperemia, the vascular occlusion test (VOT), is predictive of PAD severity as determined by ABI and 6MWT.Methods:We studied 24 patients diagnosed with PAD. The mean age of the patients was 71.3 years, including 54% (n=13) males and 46% (n=11) females. The VOT consisted of rest, occlusion, and reperfusion phases each lasting 5 min (15 min total). Muscle oxygen saturation levels were recorded at 2 hertz. For every patient, 6 features were extracted from the VOT data using computational methods. The VOT features from 15 patients were used to train function-fitting neural network models to predict ABI and 6MWT Continuous Distance. The models were then used to predict ABI and 6MWT Continuous Distance from the VOT features of 9 test patients not used in the training,Results:For patients in the test set, the ABI and 6MWT Continuous Distance predicted by the models differed from the actual measurements by 14%±13% and 15%±17%, respectively (Figure 1). For patients in the training set, the ABI and 6MWT Continuous Distance predicted by the models differed from the actual measurements by 0±0% and 12%±11%, respectively (Figure 1).Conclusion:The VOT has the potential to predict the ABI and 6MWT Continuous Distance of patients diagnosed with PAD, suggesting that the VOT can be automated and used to monitor the severity of PAD. With more data from both healthy patients and PAD patients, and improvement of the model, we anticipate that the VOT will complement ABI and 6MWT in the diagnosis and monitoring of PAD.
Abstract 4136654: Urine Output Response to a Furosemide Infusion is Associated with Acute Kidney Injury in Infants Following Cardiac Surgery
Circulation, Volume 150, Issue Suppl_1, Page A4136654-A4136654, November 12, 2024. Background:Acute kidney injury (AKI) following cardiac surgery in infants is common and associated with longer mechanical ventilation times and length of stay. Prior studies have shown that a lack of responsiveness to bolus dose furosemide has been associated with increased incidence of AKI. However, these studies have excluded patients on continuous furosemide infusions who are often younger, more hemodynamically unstable, and at higher risk for AKI.Hypothesis:Decreased urine output after initiation of a furosemide infusion predicts development of AKI.Methods:A retrospective cohort study of infants (
Abstract 4143506: Inflammation but not Coronary Atherosclerotic Burden Is Related to Oxygen Uptake On-Kinetics in the 6-Minute Walk Test
Circulation, Volume 150, Issue Suppl_1, Page A4143506-A4143506, November 12, 2024. Background:Anatomic burden of coronary artery disease (CAD) has been considered a consistent prognostic marker. Inflammation also increases the cardiovascular risk and plays a significant role in the evolution of atherosclerosis. The progression of CAD impacts the responses to exercise, reducing functional capacity. Despite this knowledge, the specific interplay between inflammation and atherosclerotic burden in influencing submaximal exercise capacity, particularly oxygen uptake (VO2) kinetics, remains underexplored in CAD. This study aims to investigate how these factors correlate with VO2on-kinetics in the Six-minute Walk Test (6MWT) in patients with CAD.METHODS:Patients with obstructive CAD, confirmed by coronary angiography, underwent a 6MWT using a mobile telemetric cardiopulmonary monitoring to assess functional capacity and the VO2on-kinetics through the mean response time corrected by work (wMRT). Inflammatory markers were analyzed by dosage of high-sensitivity C-reactive protein, interferon-gama, tumor necrosis factor alpha and interleukins (IL), IL-6, IL-8 and IL-10. Coronary atherosclerotic burden was evaluated by the Grading Scale for Anatomic Burden of Disease from COURAGE Trial. Correlation analyses were performed according to the symmetric distribution of data, using Pearson’s (r) or Spearman’s rank correlation coefficients(rs).RESULTS:A total of thirty-four patients aged between 60.3±8.0 years were enrolled, presenting body mass index of 26.0±3.7kg/cm2, left ventricular ejection fraction of 0.50±0.14, walking distance of 443±66m, VO2at steady-state (VO2SS) of 896±240ml/min and wMRT of 1.64×10-3± 1.00×10-3min2/ml. Although correlated with distance and VO2SS(r=-0.472;p=0.002 and r=-0.434;p=0.015, respectively), atherosclerotic burden was not associated with wMRT (p=0.17). High-sensitivity C-reactive protein and IL-8 were negatively associated with both distance and VO2SS(rs=-0.428;p=0.001/ rs=-0.543;p=0.001 and rs=-0.438;p=0.014/ rs=-0.407;p=0.019) and positively correlated with wMRT (rs=0.412;p=0.022/ rs=0.505;p=0.003).CONCLUSION:In contrast to anatomic burden, inflammatory markers were associated with both walking intensity and VO2kinetics. Therefore, inflammation may be more crucial to exercise response mechanisms than coronary stenosis, suggesting a paradigm shift in our understanding of clinical repercussions of obstructive CAD. Actions able to attenuate the inflammatory profile may improve exercise capacity and prognosis.
Abstract 4142557: Relationship between levels of nitric oxide (NO) concentration and flow-mediated vasodilatation test (FMD) in endothelial dysfunction development in overweight pregnant women with chronic hypertension.
Circulation, Volume 150, Issue Suppl_1, Page A4142557-A4142557, November 12, 2024. Background:In Central Asia, hypertension accounts for 14.5% of all maternal deathsThe problem of assessing endothelial dysfunction in women with hypertensive disorders during pregnancy are one of the early predictors of cardiovascular events.Objective:to determine the relationship between endothelial dysfunction and levels of nitric oxide (NO) concentration and flow-mediated vasodilatation (FMD) in overweight pregnant women with CHT.Methods:The study included 55 pregnant women of the I-II gestation period, divided into 2 groups. First group (n=34) included healthy pregnant women (healthy group). Second group (n=24) consisted of pregnant women with chronic hypertension/CHT. A physical examination was performed, heart rate was assessed, blood pressure was measured according to Korotkov method, body mass index (BMI) was calculated. Endothelial function was analyzed using a flow-mediated dilation (FMD) test by using ultrasound system Simens Acuson X700 and the level of nitric oxide (NO) concentration. NO level, which was determined by amount the main stable metabolites NO2 – and NO3 – were assessed by P.P. Golikov method. Results are presented as mean±SD. Statistical processing was carried out using the Statistica 13.0 program. P < 0.05 was considered statistically significant.Results:It was revealed that there was no significant difference in the age of women (27±3.4 in 1 group vs 29±4.5 in 2 group, P = 0.0658) and number of pregnancies between groups (3.3±1.2 in 1 group vs 3.2±1.6 in 2 group, P = 0.7920). The average level of blood pressure in the group with CHT amounted to systolic blood pressure (SBP) of 153.83±16.43 mmHg. vs 102.72±10.42 mmHg in group 1 (P
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[Articles] The performance of a point-of-care test for the diagnosis of Neurocysticercosis in a resource-poor community setting in Zambia – a diagnostic accuracy study
The TS POC CC had a promising sensitivity for diagnosis of participants with active NCC lesions within a community-based setting. Accuracy for NCC at any stage was limited for all tests (TS POC, rT24H-EITB and antigen ELISA). With further development the TS POC CC may enable a better detection and faster referral of NCC patients who may benefit from antiparasitic treatment.