Results 11 to 20 of about 66,989 (314)

Need for Speed: The Importance of Physiological Strain Rates in Determining Myocardial Stiffness

Frontiers in Physiology, 2021
The heart is viscoelastic, meaning its compliance is inversely proportional to the speed at which it stretches. During diastolic filling, the left ventricle rapidly expands at rates where viscoelastic forces impact ventricular compliance.
Matthew A. Caporizzo, Benjamin L. Prosser   +1 more
doaj   +1 more source

Inorganic phosphate accelerates cardiac myofilament relaxation in response to lengthening

Frontiers in Physiology, 2022
Myocardial relaxation in late systole is enhanced by increasing velocities of lengthening. Given that inorganic phosphate (Pi) can rebind to the force-producing myosin enzyme prior to MgADP release and hasten crossbridge detachment, we hypothesized that ...
Jane I. Wakefield, Stephen P. Bell, Bradley M. Palmer   +2 more
doaj   +1 more source

Color Flow Doppler Echocardiography in Healthy Racing Pigeons (Columba livia f. domestica) and the Evidence of Physiological Blood Flow Vortex Formations

Veterinary Sciences, 2020
In avian medicine, Doppler sonographic techniques are used to visualize and estimate blood flow in the heart. In the literature there is a lack of standardized studies of the use of color Doppler flow on healthy avian species.
Marko Legler, Lajos Koy, Norbert Kummerfeld, Michael Fehr   +3 more
doaj   +1 more source

Influence of manual thrombus aspiration on left ventricular diastolic function in patients with ST-segment elevation myocardial infarction treated with primary percutaneous coronary intervention [PDF]

Srpski Arhiv za Celokupno Lekarstvo, 2016
Introduction. Data on effects of thrombus aspiration on left ventricular diastolic function in ST-elevation myocardial infarction (STEMI) population are scarce. Objective.
Ilić Ivan, Stanković Ivan, Vidaković Radosav, Janićijević Aleksandra, Cerović Milivoje, Jovanović Vladimir, Aleksić Aleksandar, Obradović Gojko, Nikolajević Ivica, Kafedžić Srđan, Miličević Dušan, Kušić Jovana, Putniković Biljana, Nešković Aleksandar N.   +13 more
doaj   +1 more source

Left ventricular T1-mapping in diastole versus systole in patients with mitral regurgitation [PDF]

, 2022
Cardiovascular magnetic resonance T1-mapping enables myocardial tissue characterisation, and is capable of quantifying both intracellular and extracellular volume. T1-mapping is conventionally performed in diastole, however, we hypothesised that systolic
Liu, Boyang, Su Khin, Kyaw, Sharma, Harish, Hothi, Sandeep S., Wesolowski, Roman, Steeds, Richard P., Steeds, Richard P, Hothi, Sandeep S, Myerson, Saul G, Myerson, Saul G.   +9 more
core   +1 more source

Structure-based finite strain modelling of the human left ventricle in diastole [PDF]

, 2013
Finite strain analyses of the left ventricle provide important information on heart function and have the potential to provide insights into the biomechanics of myocardial contractility in health and disease. Systolic dysfunction is the most common cause
Ogden, R.W., Wang, T J, Luo, X.Y., Gao, H, Ogden, R W, Luo, X Y, Wang, T.J., Berry, C, Berry, C., Griffith, B.E., Griffith, B E, Wang, H.M., Gao, H., Wang, H M   +13 more
core   +1 more source

Comparison of diastolic function in children with transfusion dependent beta thalassemia major by tissue and conventional doppler imaging indices and its correlation with serum ferritin levels

The Turkish Journal of Pediatrics, 2019
Regular blood transfusions for children with beta thalassemia major (β- TM) results in iron overload cardiomyopathy/cardiac failure. Mortality in these children is most often because of heart failure.
Chetan Kumar Nanjegowda, Sowmini Padmanabh Kamath, Padmanabh Kamath, Tejas Dushyantbhai Shah, Vaman Kulkarni, Harsha Prasada Lashkari, Bantwal Shantharam Baliga   +6 more
doaj   +1 more source

EFFECT OF MODIFIED ULTRAFILTRATION ON HEMODYNAMICS IN PEDIATRIC CARDIAC SURGERY AT ARMED FORCES INSTITUTE OF CARDIOLOGY/ NATIONAL INSTITUTE OF HEART DISEASES (AFIC/NIHD)

Pakistan Armed Forces Medical Journal, 2020
Objective: To observe the effect of modified ultrafiltration on hemodynamics of pediatric patients. Study Design: A descriptive cross-sectional study. Place and Duration of Study: Pediatric Cardiac Surgery department, AFIC/NIHD Rawalpindi, from Jun
Muneeb Ur Rehman, Tariq Rao, Naila Niaz, Shahid Nafees, Naseem Azad, Muhammad Shoaib Umar   +5 more
doaj   +1 more source

Numerical study of hemodynamics after stent implantation during the cardiac cycle

Journal of Mechanical Engineering and Sciences, 2021
The descending aortic aneurysm is one of the most catastrophic cardiovascular emergencies resulting in high mortality worldwide. Clinical observations have pointed out that stent implantation in the sick aorta should probably allow stabilization of the ...
Abdelhakem Belaghit, B. Aour, M. Larabi, A. A. Tadjeddine, S. Mebarki   +4 more
doaj   +1 more source

Effects of omecamtiv mecarbil on failing human ventricular trabeculae and interaction with (−)‐noradrenaline

Pharmacology Research & Perspectives, 2021
Omecamtiv mecarbil (OM) is a novel medicine for systolic heart failure, targeting myosin to enhance cardiomyocyte performance. To assist translation to clinical practice we investigated OMs effect on explanted human failing hearts, specifically ...
Alexander Dashwood, Elizabeth Cheesman, Yee Weng Wong, Haris Haqqani, Nicole Beard, Karen Hay, Melanie Spratt, Wandy Chan, Peter Molenaar   +8 more
doaj   +1 more source