The left ventricles of 8 sibling dwarf pigs were stressed by banding the aorta ascendens for 7 to 49 days. There was no developmental retardation. Neither light nor electron microscopic controls showed signs of insufficiency. 3.7 X 10(7) Bq/kg (1 mCi/kg) body weight (3 H-)methyl thymidine had been applied as pulse at the end of the experiment. The 3 H-index (LI) of the left ventricular wall increases with the pressure registered (r = 0.95). At the same time the values for the right ventricular wall and the left atrium showed an inverse tendency corresponding to the fact that all indices decrease during normal growth. The relation of the indices is two to one for each atrium and its corresponding ventricle, as well as for the stressed left ventricular wall to the right one. The 3 H marked cells are found in groups with constant distances (75-85 microns). High LI are the consequences of the enlargement of these groups. There is no detectable relation to an anatomic structure. Some rare mitoses could be seen, especially in the left ventricular wall. Signs of a high biochemical activity are accumulations of mitochondria, high number of polysomes and large Golgi areas as well as laminas of ergastoplasm. The nuclei are extremely invaginated.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/S0344-0338(11)80790-9 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The Effects of Endurance Training and High-Intensity Resistance Training on Pulse Wave Velocity and QT Dispersion.
Healthcare (Basel)
January 2025
Faculty of Medicine, Physical Medicine and Rehabilitation, Ondokuz Mayis University, 55270 Samsun, Turkey.
This study aimed to examine the effects of endurance and high-intensity resistance training on arterial stiffness and ventricular repolarization in elite athletes. A total of 50 male athletes from different sports disciplines (volleyball, football, judo, and wrestling) and a sedentary group of 30 males participated in this study. Data collected from all participants included age, height, body weight, cardiovascular hemodynamic parameters, arterial stiffness parameters, and ECG measurements.
View Article and Find Full Text PDFMaternal exposure to bisphenol A induces congenital heart disease through mitochondrial dysfunction.
FASEB J
January 2025
Key Laboratory of Birth Defects and Related Diseases of Women and Children of MOE, Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China.
Congenital heart disease (CHD) represents a major birth defect associated with substantial morbidity and mortality. Although environmental factors are acknowledged as potential contributors to CHD, the underlying mechanisms remain poorly understood. Bisphenol A (BPA), a common endocrine disruptor, has attracted significant attention due to its widespread use and associated health risks.
View Article and Find Full Text PDFPulmonary Embolism in the Elderly: From Symptoms to Speckle Tracking Echocardiography.
J Cardiovasc Dev Dis
December 2024
First Department of Cardiology, University Hospital of Ioannina, 455 00 Ioannina, Greece.
(1) Background: There are little data about the differences in clinical and echocardiographic characteristics between elderly (aged ≥ 65 years) and younger patients with acute pulmonary embolism (PE). (2) Methods: Consecutive patients diagnosed with PE in a tertiary hospital were identified. Clinical characteristics, biomarkers and transthoracic echocardiography indices including right ventricular free wall longitudinal strain (RV-FWLS) were recorded.
View Article and Find Full Text PDFProlonged pain-to-balloon time still impairs midterm left ventricular function following STEMI.
BMC Cardiovasc Disord
January 2025
Department of Cardiology, Ulm University Heart Center, Albert-Einstein-Allee 23, 89081, Ulm, Germany.
Background: ST-elevation myocardial infarction (STEMI) demands near-time reperfusion to reduce the risk of long-term heart failure. This study evaluates the proportion of impaired left ventricular ejection fraction (LVEF) following STEMI in the context of current healthcare settings at a tertiary care center equipped with the most advanced and up-to-date standards of care.
Methods: Patients experiencing STEMI as their first manifestation of coronary artery disease were analyzed, as these individuals had no prior experience with heart-related chest pain.
Association with Outcome of the Regurgitant-Volume Adjusted Right Ventricular Ejection Fraction in Secondary Tricuspid Regurgitation.
J Am Soc Echocardiogr
January 2025
Department of Medicine and Surgery, University of Milano-Bicocca, Milan, Italy; Department of Cardiology, Istituto Auxologico Italiano, IRCCS, Milan, Italy.
Background: In patients with secondary tricuspid regurgitation (STR), right ventricular ejection fraction (RVEF) may not accurately reflect the actual RV systolic performance since a considerable amount of the RV stroke volume (SV) is regurgitated back into the right atrium. To overcome this limitation, we explored the association with the outcome of the effective RVEF (eRVEF), which accounts for the tricuspid regurgitant volume (RegVol).
Methods: 513 patients with STR (mean age 75±13 years, 39% atrial STR, 58% severe) underwent complete two-, three-dimensional, and Doppler echocardiography.
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!