Ventricle in Biological News

Three Dimensional Visualization of Right Ventricle Provides Important Information for Treatment of Patients with Tetralogy of Fallot, According to a Study in The American Journal of Cardiology

... -- Three dimensional visualization of the right ventricle provides important shape and volumetric ... developing levels of obstruction from the right ventricle to the lungs known as pulmonary stenosis. ... and 15 patients with repaired TOF. "Right ventricle measurement is a critical component in ...

Eat less or exercise more? Either way leads to more youthful hearts

... of heart health. "During filling, the left ventricle is a suction pump," Kovcs explains. "Think of the ... the body during contraction (systole), the left ventricle springs back to draw in new blood (diastole). ... analysis showed that in both groups, the left ventricle gained an increased capacity to expand to ...

New data shows benefits of MitraClip for patients with mitral regurgitation

... from significantly improved function of the left ventricle (commonly known as reverse remodeling), according ... Significant Reverse Remodeling of the Left ventricle 12 months after a successful MitraClip procedure, significant reverse remodeling of the left ventricle was demonstrated. Reverse remodeling was assessed ...

Plasminogen activator inhibitor type-1 -- a potential link between heart failure and diabetes

... segmental function, and greater transmitral E-wave amplitude. In summary, overexpression of PAI-1 in the heart altered the response of the left ventricle to myocardial infarction. It led to increased expression of PAI-1 late after coronary occlusion accompanied by increased fibrosis and functional ...

Safe new therapy for genetic heart disease

... group will extend this pilot trial to more patients to confirm the current findings and to identify the mechanism by which candesartan improves left ventricle thickening. ...

Second Life a first for UH department of health and human performance

... how obesity impacts the heart, I can make a 3-D model of a healthy heart and a diseased heart and allow the students to view the inside of the left ventricle to demonstrate how blood flow is altered by disease," McFarlin said. "I want to be mindful of what students want. It's about them and trying to ...

'Healthy' sterols may pose health risk

... accumulate in heart valves and lead to stenosis. Aortic valve stenosis (AS) results from cholesterol accumulation in the valve between the left ventricle and aorta; this impedes the flow of blood and puts extra pressure on the heart. About 2% of individuals over 65 (and over 5% of those over 85) have ...

Carbon monoxide may cause long-lasting heart damage

... exposed to a combination of CO and oxygen, which best simulates the environmental conditions of CO poisoning. The pressure generated in the left ventricle of the heart was used as an indicator of heart function. Left ventricular-generated pressure was decreased in both the nitrogren control and CO ...

Genetic contributions to human brain morphology and intelligence

... white matter areas surrounding the lateral ventricles (up to 0.50). This finding coincides with the significant environmental influences on lateral ventricle volume [common (0.58) and unique (0.42) with no significant contributions of genes] that was reported previously in this twin sample [Baar et al., ...

A step toward tissue-engineered heart structures for children

... September 11, they describe making pulmonary valves through tissue engineering. These valves, which provide one-way blood flow from the hearts right ventricle into the pulmonary artery, are often malformed in congenital heart disease, putting an extra burden on the heart. The heart valve is a complex ...

Geron Demonstrates hESC-derived cardiomyocytes improve heart function after myocardial infarction

... Gerons president and chief executive officer. Our cardiomyocytes are the first human cardiac cells shown to survive after injection into an infarcted ventricle and to produce significant improvement in heart function. hESCs are the only cell type shown definitively to form cardiomyocytes. Approximately ....

Hearts of male and female rainbow trout are different

... a larger outermost (epicardial) layer of the ventricle vs. the inner endocardium layer. The trout heart ... and function. Methodology Uniform ventricle strips or transverse rings were cut from 10-12 ... ways: (1) incubated without stimulation (i.e., ventricle strips were incubated in a respiration cell ...

Mechanical 'artificial hearts' can remove need for heart transplant by returning heart to normal

... not awaiting transplants. LVADs work by being connected to the left ventricle of the heart, either directly or by a tube. They remove oxygen rich blood from the left ventricle and take the blood to a mechanical pump. The mechanical pump then pumps ...

Potential heart benefit found in stem cells

... younger and stronger stem cells." Effect of Stem Cells on Left ventricle Wall Thickness and Capillary Density in Pigs Following Myocardial ... animals were euthanized and the hearts were removed to measure the left ventricle wall thickness and the density of the corresponding capillaries in four ...

Percutaneous aortic valve replacement safe, successful in high-risk patients

... surgery because of other health problems. In severe narrowing, or stenosis, of the aortic valve, the heart has difficulty pumping blood from the left ventricle to the rest of the body. The result is a back-up of fluid into the lungs and severe shortness of breath with even minimal activity. With the ...

Therapeutic role found for carbon monoxide

... BIDMC and Associate Professor of Surgery at Harvard Medical School. Pulmonary arteries ?the blood vessels that carry blood from the heart's right ventricle to the small arteries in the lungs -- are made up primarily of endothelial cells and smooth muscle cells. PAH develops when, for unknown reasons, the ...

Reversing 'hibernating' heart muscle focus of UB researchers

... research has shown that, while restoring blood flow to these "hibernating" regions improves function and a patient's prognosis, cells in the left ventricle (the heart's main pumping chamber) often remain chronically dysfunctional and do not return to normal. The reasons for this remain unclear, ...

New study shows antibiotic may protect the heart

... reperfusion injury, and possibly long-term prevention of ventricular remodeling ?the changes in size, shape and function that may occur to the left ventricle of the heart," said Rakesh C. Kukreja, Ph.D., professor of medicine and Eric Lipman Chair of Cardiology at VCU. Kukreja is lead author of the study. ...

Viagra improves high altitude exercise performance up to 45% for some

... by 15% compared to placebo trials at altitude. The cyclists also significantly improved stroke volume (the volume of blood moved out of one ventricle of the heart per beat) and cardiac output (stroke volume times heart rate) compared to the placebo trial. Sildenafil also minimized the decline of ...

An elephant tail

... following a heart attack) over a 6-month period would decrease vascular stiffness and improve ejection fraction (a measure of how much blood the left ventricle of the heart pumps out with each contraction). The randomized, double-blind, placebo-controlled trial included 153 STEMI patients; 77 were 60 ...

Little known DNA repair enzyme may be a tumor suppressor gene

... following a heart attack) over a 6-month period would decrease vascular stiffness and improve ejection fraction (a measure of how much blood the left ventricle of the heart pumps out with each contraction). The randomized, double-blind, placebo-controlled trial included 153 STEMI patients; 77 were 60 ...

Use of amino acid supplement following a heart attack provides no benefit, may be harmful

... following a heart attack) over a 6-month period would decrease vascular stiffness and improve ejection fraction (a measure of how much blood the left ventricle of the heart pumps out with each contraction). The randomized, double-blind, placebo-controlled trial included 153 STEMI patients; 77 were 60 ...

Mice with glowing hearts shed light on how hearts develop

... at around 9.5 days," said Kotlikoff. By day 10.5, there are only two chambers (rather than four chambers in an adult mammal): an atrium on top and a ventricle on the bottom. A delay in beats between the two gives the atrium time to contract and push blood through the heart, but the mechanism that controls ...

Carnegie Mellon develops non-invasive technique to detect transplant rejection at cellular level

... biopsies for the first year. Heart biopsies are invasive procedures that involve threading a catheter through the jugular vein to the heart's right ventricle and snipping out several tiny pieces of tissue. A pathologist then tests the tissue to identify the presence of immune cells (such as macrophages) as ...

Whole-genome study at Johns Hopkins reveals a new gene associated with abnormal heart rhythm

... and was not previously suspected to play a role in heart function. However, the research team found that the NOS1AP gene is turned on in the left ventricle of the human heart. And the "lub" part of the "lub-dub" heartbeat corresponds to ventricular contraction. So NOS1AP is active in the right place and ...

Implantable pumps extend lives of patients too sick for transplant

... by Duke University Medical Center cardiologists. The pumps, known as left ventricular assistant devices (LVADs), are employed when the heart's left ventricle ?the chamber of the heart that pumps blood throughout the body ?is too weak to pump enough blood to nourish the body's tissues. LVADs have been used ...

MicroRNA tweaks protein that controls early heart development

... critical to any organ's development," he said. "The Hand2 protein is a master regulator, and in its absence, you don't get any expansion of the heart ventricle at all. The finding that this microRNA controls Hand2, and probably several other proteins, is very significant." The UT Southwestern research ...

Spiders help scientists discover how muscles relax

... that arise from malfunctioning of the muscles' on/off switches. One such disease is hypertrophic cardiomyopathy, in which the wall of the left ventricle of the heart becomes enlarged, causing sudden death. It is caused by mutations in certain genes that encode several muscle proteins--some of which ...

Python a 'hearty' eater

... to seven days and was accompanied by a rapid remodeling of the ventricle--the lower portion of the blood-pumping organ. In experiments, the python's ventricle increased in mass by 40 percent within 48 hours. Unlike a human heart, which has two ventricles or pumping chambers, a reptile heart has only one. ...