Results 281 to 290 of about 4,359,782 (346)

The Cardiac Sarcomere and Cell Cycle

Current Cardiology Reports, 2022
The lack of adult human cardiomyocyte proliferative capacity impairs cardiac regeneration such as after myocardial injury. The sarcomere, a specialized actin cytoskeletal structure that is essential for twitch contraction in cardiomyocytes, has been considered a critical factor limiting adult human cardiomyocyte proliferation through incompletely ...
Anthony M. Pettinato, Feria A. Ladha, J. Travis Hinson   +2 more
openaire   +2 more sources

A Cardiac‐Targeted Nanozyme Interrupts the Inflammation‐Free Radical Cycle in Myocardial Infarction

Advances in Materials, 2023
Severe systemic inflammation following myocardial infarction (MI) is a major cause of patient mortality. MI‐induced inflammation can trigger the production of free radicals, which in turn ultimately leads to increased inflammation in cardiac lesions (i.e.
Xue-ying Liu, Binghua Che, Jingqi Chen, Xuan Wang, Xinfeng Dai, Yuqing Li, Huayuan Zhou, Lianming Wu, Zhuang Liu, Yu Yang   +9 more
semanticscholar   +1 more source

The phases of the cardiac cycle

American Heart Journal, 1972
Abstract The events of the cardiac cycle are re-evaluated on the basis of newer ideas of inertial states, compliance, and similar hemodynamic principles by the use of more precise, modern recording equipment. While these events generally agree with classic schemes, certain discrepancies which tend to cause inaccurate measurement are presented.
Aldo A. Luisada, Donald M. Maccanon
openaire   +2 more sources

The cardiac cycle—a model

Journal of Biological Education, 1985
This easy-to-construct model makes use of the redundant kymograph and illustrates dramatically the cardiac ...
N. Ross, L. A. Morgan
openaire   +2 more sources

Oscillations of cAMP with the cardiac cycle

Biochemical and Biophysical Research Communications, 1983
Oscillations of cAMP with the cardiac cycle were demonstrated in the rat heart using a stimulator-triggered rapid freeze-clamp to decrease the temperature of the heart from 37 degrees C to -80 degrees C in 5 msec (20,000 degrees/sec) at a predetermined phase of the cardiac cycle. The nucleotide, cAMP, oscillated 60% with the cardiac cycle during normal
Robert J. Coffelt, Joan Wikman-Coffelt, Richard E. Sievers, William W. Parmley   +3 more
openaire   +3 more sources

Robust Segmentation of Intima–Media Borders With Different Morphologies and Dynamics During the Cardiac Cycle

IEEE journal of biomedical and health informatics, 2018
Segmentation of carotid intima-media (IM) borders from ultrasound sequences is challenging because of unknown image noise and varying IM border morphologies and/or dynamics. In this paper, we have developed a state-space framework to sequentially segment
Shen Zhao, Z. Gao, Heye Zhang, Yaoqin Xie, Jianwen Luo, D. Ghista, Zhanghong Wei, Xiaojun Bi, H. Xiong, Chenchu Xu, S. Li   +10 more
semanticscholar   +1 more source

HFSCCD: A Hybrid Neural Network for Fetal Standard Cardiac Cycle Detection in Ultrasound Videos

IEEE journal of biomedical and health informatics
In the fetal cardiac ultrasound examination, standard cardiac cycle (SCC) recognition is the essential foundation for diagnosing congenital heart disease.
Bin Pu, Kenli Li, Jianguo Chen, Yuhuan Lu, Q. Zeng, Jiewen Yang, Shengli Li   +6 more
semanticscholar   +1 more source

Cardiac Cycle

Basic Physiology for Anaesthetists, 2019
• Every single beat of the heart involves three major stages: cardiac diastole, when chambers are relaxed and filling passively; atrial systole when the atria contract leading to ventricular filling; and ventricular systole when blood is ejected into ...

semanticscholar   +2 more sources

The cardiac cycle

Anaesthesia & Intensive Care Medicine, 2012
Abstract The heart consists of four chambers that are connected in such a way that contraction of them causes the heart to act as a pump, the right half of the heart passing blood from the venae cavae to the pulmonary circulation for oxygenation and the left half of the heart pumping oxygenated blood from the pulmonary veins into the aorta and ...
openaire   +2 more sources

An analytic model of the cardiac cycle

2008 IEEE Nuclear Science Symposium Conference Record, 2008
This paper analyzes the volume curves of the cardiac chambers in the cardiac cycle. Volume curves were measured from the cardiac CT test case reconstructed at 6 different phases. The ventricular and atrial volume curves were then interpolated and applied to an anthropomorphic analytical model human heart.
Freederic Noo, Stanislav Zabicc, Dominic J. Heuscher   +2 more
openaire   +2 more sources