Results 291 to 300 of about 4,585,967 (340)

mmECG: Monitoring Human Cardiac Cycle in Driving Environments Leveraging Millimeter Wave

IEEE Conference on Computer Communications, 2022
The continuously increasing time spent on car trips in recent years brings growing attention to the physical and mental health of drivers on roads. As one of the key vital signs, the heartbeat is a critical indicator of drivers' health states.
Xiangyu Xu, Jiadi Yu, Chengguang Ma, Yanzhi Ren, Hongzhi Liu, Yanmin Zhu, Yi-Chao Chen, Feilong Tang   +7 more
semanticscholar   +1 more source

Cardiac cycle timing and contractility following acute sport-related concussion

Research in Sports Medicine: An International Journal, 2022
Cardiac sequelae following sport-related concussion are not well understood. This study describes changes in the cardiac cycle timing intervals and contractility parameters during the acute phase of concussion. Twelve athletes (21 ± 2 years, height = 182
Jyotpal Singh, Chase J. Ellingson, Cody A. Ellingson, Parker Scott, J. Neary   +4 more
semanticscholar   +1 more source

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

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