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The fabrication of three-dimensional (3D) cardiac tissue using human induced pluripotent stem cell-derived cardiomyocytes (iPSC-CMs) is useful not only for regenerative medicine, but also for drug discovery. Here, we report a bio-3D printer that can fabricate tubular cardiac constructs using only human iPSC-CMs. Protocols to evaluate the contractile force and response to electrical stimulation in the cardiac constructs are described. We confirmed that the constructs can be applied for transplantation or drug response testing. In the near future, we expect that the constructs will be used as alternatives for heart transplantation and in animal experiments for new drug development.
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http://dx.doi.org/10.1007/978-1-0716-1484-6_6 | DOI Listing |
Stem Cell Rev Rep
September 2025
Department of Medical Genetics and Prenatal Diagnostics, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
The emergence of organoid models has significantly bridged the gap between traditional cell cultures/animal models and authentic human disease states, particularly for genetic disorders, where their inherent genetic fidelity enables more biologically relevant research directions and enhances translational validity. This review systematically analyzes established organoid models of genetic diseases across organs (e.g.
View Article and Find Full Text PDFBackground: During left bundle branch area pacing (LBBAP), several markers of electrical synchrony, (V6 R-wave peak time (RWPT), aVL-RWPT, and the V6-V1 interpeak interval), are commonly used to assess left bundle branch (LBB) capture. Nevertheless, the relationship between these electrocardiographic (ECG) measurements and mechanical synchrony remains poorly understood.
Objective: We aimed to analyze the association between electrical parameters from the paced QRS complex and mechanical performance assessed through 2D strain and myocardial work (MW) indices, following LBBAP implantation.
J Am Soc Echocardiogr
September 2025
Department of Cardiology and Vascular Medicine, Universitas Indonesia, Indonesia. Electronic address:
Nearly 30% of patients with cardiac resynchronization therapy (CRT) are non- responders. Speckle tracking echocardiography (STE) parameters are able to evaluate electromechanical dyssynchrony that could improve outcomes. We aim to examine the association between various STE parameters with CRT response and clinical outcomes in heart failure patients.
View Article and Find Full Text PDFAm Heart J
September 2025
Institute of Sports Medicine and Science, National Italian Olympic Committee, Largo Piero Gabrielli, 1 - 00197 Rome, Italy.
Background: Athlete's heart, characterized by cardiac chambers adaptations to exercise has some diagnostic overlaps with dilated cardiomyopathy (DCM). In the setting of differential diagnosis, myocardial work indexes (MWI), afterload-independent tool, could be helpful to identify early subclinical alterations. The aim of our study was to assess the utility of MWI in athletes with mildly reduced left ventricular ejection fraction (LVEF).
View Article and Find Full Text PDFTraffic Inj Prev
September 2025
Chongqing Jianzhu College, Chongqing, P.R. China.
Purpose: The monotonous lighting environment in extra-long tunnels often induces mind-wandering in drivers. To address this issue, this study explores effective strategies to optimize tunnel lighting environments by configuring various background colors and special lighting zones to enhance the alertness of young drivers and ensure driving safety.
Methods: A virtual driving simulator was utilized to carry out the experiment.