Background: Natriuretic peptides are released by the heart in response to wall stress.
Objective: The NT-Pro-BNP concentrations in slow coronary flow (SCF) patients were assessed before and after the exercise test and compared with the values of healthy controls.
Methods: The study population was 34 patients with SCF [22 males (64.7%), aged 51.0 ± 6.2 years], and 34 normal subjects with normal coronary arteries [21 males (61.8%), aged 53.2 ± 6.6 years]. Coronary flow rates of all patients and control subjects were documented as Thrombolysis in Myocardial Infarction (TIMI) frame count. Blood samples were drawn at rest and after the exercise testing.
Results: The baseline NT-Pro-BNP concentrations of the SCF patients were higher than those of the control subjects (NT-Pro-BNP: 49.7 ± 14.2 pg/mL vs. 25.3 ± 4.6 pg/mL p<0.0001, respectively), and this difference increased after exercise test between the groups (NT-Pro-BNP: 69.5 ± 18.6 pg/mL vs. 30.9 ± 6.4 pg/mL p<0.0001). In SCF group after exercise, NT-Pro-BNP concentration in 15 patients with angina was higher than those without angina (76.8 ± 17.8 pg/mL vs. 63.8 ± 17.5 pg/mL p=0.041). NT-Pro-BNP concentration in 11 patients with ST depression was also higher than those without ST depression (82.4 ± 17.3 pg/mL vs. 63.3 ± 16.1 pg/mL p=0.004). Median post-exercise increases in NT-Pro-BNP (Δ NT-Pro-BNP) were higher in the SCF group than in the control group (Δ NT-Pro-BNP: 19.8 ± 7.7 pg/mL vs. 5.7 ± 4.5 pg/mL p<0.0001).
Conclusion: The results of this study suggest that there may be an important pathophysiologic link between the severity of SCF (microvascular or epicardial coronary artery dysfunction) and the level of circulating NT-Pro-BNP in SCF patients.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Parametric Search for Optimal Channel Shape for Swirling Blood Flow in the Heart and Main Vessels.
Dokl Biochem Biophys
January 2025
Bakulev National Medical Research Center for Cardiovascular Surgery, Moscow, Russia.
The study presents a numerical parametric investigation of flow structures in channels with a longitudinal-radial profile zR = Const and a spherical dome at the base. The goal of the study was to examine the flow structures in these channels depending on the exponent N of the profile and the height of the dome, to determine the conditions that provide optimal centripetal swirling flow, analogous to blood flow in the heart chambers and major vessels. The investigation was conducted using a comparative analysis of flow structures in channel configurations zR = Const, carried out in two stages.
View Article and Find Full Text PDFCardiac Lymph Flow Features and New Opportunities for Their Experimental Visualization.
Dokl Biochem Biophys
January 2025
Laboratory of Microangiopathic Mechanisms of Atherogenesis, St. Petersburg State University, St. Petersburg, Russia.
The aim of this study was to describe the features of myocardial lymph flow using a new combined method of visualization of the lymphatic system. The study was performed on pig hearts harvested from a local slaughterhouse. The original dye, consisting of lipid-soluble chlorophyll and lipiodol, was injected stepwise into the lymphatic vessels.
View Article and Find Full Text PDFCentral or Peripheral Venoarterial Extracorporeal Membrane Oxygenation for Pediatric Sepsis: Outcomes Comparison in the Extracorporeal Life Support Organization Dataset, 2000-2021.
Pediatr Crit Care Med
January 2025
Department of Pediatrics, Division of Pediatric Critical Care, Vanderbilt University Medical Center, Nashville, TN.
Objectives: Small studies of extracorporeal membrane oxygenation (ECMO) support for children with refractory septic shock (RSS) suggest that high-flow (≥ 150 mL/kg/min) venoarterial ECMO and a central cannulation strategy may be associated with lower odds of mortality. We therefore aimed to examine a large, international dataset of venoarterial ECMO patients for pediatric sepsis to identify outcomes associated with flow and cannulation site.
Design: Retrospective analysis of the Extracorporeal Life Support Organization (ELSO) database from January 1, 2000, to December 31, 2021.
The effect of increased vascular afterload measures on flow rate and survival in severe aortic stenosis.
Eur Heart J Cardiovasc Imaging
January 2025
Faculty of Health and Medicine, Wallace Wurth Building (C27), Cnr High St & Botany St, UNSW Sydney, Kensington, NSW 2033, Australia.
Aims: Although an association between the systemic circulation and transaortic flow rate (TFR) is frequently hypothesized in patients with aortic stenosis (AS), it has not been demonstrated previously. We sought to explore the relationship between blood pressure (BP), vascular afterload measures, clinical history of hypertension, TFR, and survival in patients with severe AS (aortic valve area ≤ 1 cm²).
Methods And Results: We studied 323 patients ≥ 65 years (110 prospective, 213 registry analysis) who underwent transcatheter aortic valve replacement over a 5-year period.
Association between the Tpeak-Tend interval on admission and coronary microvascular dysfunction in Takotsubo syndrome.
ESC Heart Fail
January 2025
Division of Cardiology, Department of Medicine, Kindai University Faculty of Medicine, Osaka, Japan.
Aims: The Tpeak-Tend interval on electrocardiogram may be a predictor of worse outcomes in Takotsubo syndrome (TTS), but the mechanisms have not been fully determined. This study aimed to investigate the relationships between the corrected Tpeak-Tend (cTp-e) interval and coronary microvascular-dysfunction (CMD) assessed by the angiography-derived index of microvascular resistance (Angio-IMR) and the in-hospital prognosis in patients with TTS.
Methods And Results: We retrospectively evaluated 111 consecutive patients admitted for TTS who underwent coronary angiography at Kindai University Hospital from October 2009 to July 2023.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!