This letter discusses the possibility of Takotsubo cardiomyopathy (TTC) as an alternative diagnosis in a recently reported case of acute myocardial infarction following a hump-nosed viper bite. The patient's presentation, including delayed chest tightness, elevated troponin, ECG changes, and normal coronary arteries, coupled with complete recovery within 3 months, strongly suggests TTC. Multiple case reports have documented the association between snakebites and TTC, with proposed pathophysiological mechanisms including sympathetic surge from pain and stress, direct cardiotoxic effects of venom, and inflammatory mediators during envenomation. The excessive catecholamine response may trigger transient cardiac dysfunction characteristic of TTC. Recognizing TTC as a potential complication of snakebites has important clinical implications, as its management and prognosis differ from acute coronary syndrome. Understanding this association may enhance diagnostic approaches and treatment strategies in similar cases, particularly when normal coronary arteries and complete cardiac recovery are observed.
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http://dx.doi.org/10.1186/s41182-025-00709-5 | DOI Listing |
Circ J
March 2025
Department of Cardiovascular Medicine, Shinshu University School of Medicine.
Background: The EMPA-REG OUTCOME trial confirmed empagliflozin reduced mortality and heart failure hospitalization risk. These findings raised the possibility that empagliflozin may modulate cardiac autonomic function in patients with type 2 diabetes (T2D).
Methods And Results: The EMPYREAN study was a prospective randomized open-label assessor-blinded multicenter investigation of patients with T2D without prior antidiabetic therapy with sodium-glucose cotransporter 2 or dipeptidyl peptidase 4 inhibitors.
Semin Thromb Hemost
March 2025
Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark.
Coronary artery disease (CAD) is a leading cause of morbidity and mortality worldwide, with platelet reactivity playing a central role in its pathogenesis. Recent research has identified microRNAs (miRNAs; miRs) as potential biomarkers for CAD, due to their ability to regulate platelet function and reactivity. This review focuses on four key miRNAs-miR-223, miR-126, miR-21, and miR-150-known to influence platelet reactivity and their implications in CAD.
View Article and Find Full Text PDFJ Control Release
March 2025
Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan; Premium Research Institute for Human Metaverse Medicine (WPI-PRIMe), Osaka University, Osaka, Japan. Electronic address:
Messenger RNA (mRNA) has great potential to provide innovative medical solutions in the treatment of heart failure. Although lipid nanoparticles (LNPs) are an established mRNA delivery system, effectively delivering LNPs to the heart remains a significant challenge. Here, we evaluated the efficacy of transcatheter intracoronary (IC) administration compared to intravenous (IV) and intramyocardial (IM) administration in normal and ischemia-reperfusion (I/R) model rabbit hearts using LNPs encapsulating Firefly Luciferase (FLuc) mRNA.
View Article and Find Full Text PDFJ Mol Cell Cardiol
March 2025
Voiland School of Chemical and Bioengineering, Washington State University, Pullman, WA 99163-1062, USA; Department of Integrative Physiology and Neuroscience, Washington State University, Pullman, WA 99163-1062, USA. Electronic address:
Sarcomere length-dependent activation (LDA) is essential to engaging the Frank-Starling mechanism in the beat-to-beat regulation of cardiac output. Through LDA, the heart increases the Ca sensitivity of myocardial contraction at a longer sarcomere length, leading to an enhanced maximal force at the same level of Ca. Despite its importance in both normal and pathological states, the molecular mechanism underlying LDA, especially the origin of the sarcomere length (SL) induced increase in myofilament Casensitivity, remains elusive.
View Article and Find Full Text PDFJ Biomech
March 2025
Department of Computational Physiology, Simula Research Laboratory, Kristian Augusts gate 23, 0164 Oslo, Norway. Electronic address:
Medical image-based computational fluid dynamics (CFD) is a valuable tool for studying cardiovascular hemodynamics and its role in vascular pathologies. However, patient-specific flow rate measurements are rare. As a remedy, individual flow rates are typically estimated using anatomical features.
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