Navigation Links
Influence Of Heart Rate On Myocardial Oxygen Tension

The influence of heart rate on cardiac output, oxygen consumption, and myocardial activity has been widely investigated.// However, the influence of heart rate on myocardial oxygen tension (pO2) remains unclear. Since the introduction of flexible pO2 micro catheters to measure partial oxygen tension in a working muscle, it is possible to investigate the influence of heart rate on myocardial oxygen tension.

In a recent study, researchers from Germany examined the effect of a changing heart rate on myocardial oxygen tension. The study was done also to evaluate a possible threshold value for an ideal heart rate at which myocardial oxygen tension (pO2) is optimal. Furthermore, the time frame of response of pO2 to a change in heart rate was analyzed. These questions were addressed in an animal model using flexible pO2 probes.

For the study, to be published in the journal Microvascular Research, intraoperatively, a flexible pO2 micro catheter was positioned in the mid-myocardium of 8 male farm pigs. The heart rate was varied via an external pacer from base rate up to fibrillation and the corresponding myocardial pO2 was measured.

The researchers found that within 2 min, the myocardial pO2 adjusted to a change in heart rate. In this animal model, an optimal myocardial pO2 was observed at 109 bpm. A further increase in heart rate led to a decrease in myocardial pO2. Each change in heart rate resulted in a corresponding change of pO2 within roughly 2 min. When the heart rate was reaching the level of a fibrillation, pO2 dropped to zero.

Left ventricular ischemia with subsequent necrosis of myocardium is the most important factor for postoperative myocardial insufficiency leading to death or myocardial dysfunction after open-heart surgery. Myocardial oxygen tension is depending on several factors such as coronary perfusion pressure, metabolic need, heart rate, and tenacity of the coronary vessels. An increasing heart rate starting from a
'"/>




Page: 1 2

Related medicine news :

1. Diet Can Influence Allergic Skin Reactions
2. Influence of diet on allergic Reactions
3. Alcoholism Influenced By Both Genetics & Family Environment
4. Hunger Found To Influence Taste
5. Body Weight Found To Influence PSA Levels
6. Depressed Mothers Found To Influence Their Child’s Behavio
7. Childhood Obesity May Influence The Their Quality Of Life
8. Elevated Insulin Levels To Influence Levels Of Inflammatory Markers
9. Vitamins Found To Influence Birth Weight
10. Influence of Celebrities on Breast Cancer Awareness
11. Genetic Expressions Can Influence The Process Of Aging
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Influence Heart Rate Myocardial Oxygen Tension

(Date:12/22/2014)... Petersburg, FL (PRWEB) December 22, 2014 Christmas ... Sublime Beauty® has a fast and easy solution that will ... gift cards can be purchased from from $25 up to ... "We offer 100% customer satisfaction and a wide array of ... have no fees and no expiration dates. , Gift ...
(Date:12/22/2014)... The NLN’s 2015 Leadership ... this month. Faculty have been selected through competitive ... fast-tracked for administrative leadership roles within their academic ... Simulation Educators, featuring a curriculum uniquely devised for ... , Twenty nurse educators were chosen for ...
(Date:12/21/2014)... 22, 2014 Recently, BambooFlooringChina.com, a famous ... woven bamboo flooring collection , and launched a bamboo ... promotion is valid until Jan. 30, 2015. , According ... is the hardest bamboo flooring available today; it has ... of traditional teak hardwoods. Strand woven bamboo is made ...
(Date:12/21/2014)... Gables, FL (PRWEB) December 21, 2014 When ... head lice, who do they call? The new answer is ... Blvd, Coral Gables FL 33134, their newest treatment center will ... this pest quickly, conveniently and without the use of harmful ... Opening is scheduled for January 1, 2015. Like the company’s ...
(Date:12/21/2014)... 2014 Recently, one of the best ... Prom Shop has introduced its new collection of ... big discounts on all its prom dresses & other ... insists on providing top quality dress products and great ... considered as one of the best prom dresses online ...
Breaking Medicine News(10 mins):Health News:NLN Leadership Institute Announces 2015 Cohorts 2Health News:NLN Leadership Institute Announces 2015 Cohorts 3Health News:BambooFlooringChina.com Announced Its Durable Strand Woven Bamboo Flooring Collection 2Health News:All-Natural Florida Lice Removal Company Opens New Lice Treatment Salon In South Florida 2Health News:New Prom Dresses From One Of The Best Prom Dresses Online Shops, LunaDress Prom Shop 2
... (AMS), which affects about half of those ascending to heights ... pulmonary or cerebral edema. ,The interest of the general ... past 25 years. This change is partly due to media ... In spite of these apparent changes, it is unknown whether ...
... deadly bird flu since it is still rampant in the region, ... ,"I think countries in this part of the world have ... it, the virus is still circulating," said Shigeru Omi, WHO's regional ... We remain concerned. We must avoid human transmission," he told reporters ...
... patients who have already gone blind in one eye ... and Therapeutics Bulletin (DTB). ,But that is ... (NICE), the body responsible for guiding the NHS on ... (Lucentis) and pegaptanib (Macugen) are licensed in the UK ...
... Biotechnology Co., Ltd. announced that a team led by ... completed a study to assess clinical efficacy, safety, ... for patients with peripheral vascular disease of the lower ... research and treatments for ataxia, cerebral palsy, spinal cord ...
... Those involved in biological weapons programs should be logically liable ... it seems to have happened in US and the Centers ... research laboratory at Texas A&M University to stop all work ... investigating reports of lab workers infected with the category B ...
... personnel involved in the Iraqi invasion of 2003 have ... published ahead of print in Occupational and Environmental Medicine. ... combat to pierce armoured vehicles, and spontaneously combusts on ... breathed in or eaten/drunk in contaminated food/water. ...
Cached Medicine News:Health News:Acute Mountain Sickness may Lead to Pulmonary or Cerebral Edema 2Health News:Bird Flu in Asia Still High Risk Says WHO Official 2Health News:Draft National Policy on Sight-saving Drugs unacceptable 2Health News:Adult Stem Cells Show Promise for Peripheral Vascular Disease 2Health News:Bio-defense Lab Ordered Shut Down as Researchers Get Infected 2Health News:Bio-defense Lab Ordered Shut Down as Researchers Get Infected 3Health News:Bio-defense Lab Ordered Shut Down as Researchers Get Infected 4
(Date:12/19/2014)... 2014  In the Friday, December 19 edition of ... Healthcare Information Technology (HIT) features Konica Minolta, the company announced today. ... with several leading healthcare organizations. In addition to ... markets, such as New York , ... , Minneapolis and San ...
(Date:12/19/2014)... , Dec. 19, 2014 Breckenridge Pharmaceutical, ... multi-product agreement with MSN Laboratories Pvt. Ltd. ( ... expect to commercialize several new ANDAs.  Under the terms ... the products exclusively to Breckenridge for the U.S. market, ... its label.  Breckenridge and MSN have agreed to develop ...
(Date:12/19/2014)... SAN DIEGO and CARDIFF-BY-THE-SEA, ... Therapeutics, Inc. (NASDAQ: SRNE ;  Sorrento), ... and associated pain, and Conkwest, Inc., a privately-held ... a Natural Killer (NK) cell-line based therapy, announced ... definitive agreement to jointly develop next generation CAR-TNK™ ...
Breaking Medicine Technology:USA Today Supplement Featuring Konica Minolta Focuses on Impact of Healthcare IT 2Breckenridge Pharmaceutical signs Multi-Product Generic Agreement with MSN Laboratories Pvt. Ltd. 2Sorrento and Conkwest Announce Exclusive Global Collaboration 2Sorrento and Conkwest Announce Exclusive Global Collaboration 3Sorrento and Conkwest Announce Exclusive Global Collaboration 4Sorrento and Conkwest Announce Exclusive Global Collaboration 5
... Inc. (Nasdaq: MYL ) today announced that ... a settlement agreement with Warner Chilcott resolving litigation related ... and Ethinyl Estradiol Tablets USP (Chewable), 0.4 mg/0.035 mg ... Regimen). This medication is an oral contraceptive. ...
... Inc. announced it has entered into a License and ... surgical adhesion barrier for the prevention of postoperative adhesions ... Michael Myers, President and CEO stated "This is an ... important and dynamic market for medical products and we ...
Cached Medicine Technology:Mylan Announces Femcon® Fe Settlement Agreement 2Innocoll Enters Partnership With Pioneer Pharma in China for the Distribution of CollaGUARD 2Innocoll Enters Partnership With Pioneer Pharma in China for the Distribution of CollaGUARD 3
McDavid® Patella Knee Support helps relieve the symptoms of chondromalacia patellar subluxation and patellar tendonitis. Features two medial and two lateral spring-steel stays. 3/16" thick neopre...
... Exotec® Dual Instabilities Lite Lightweight mechanical ... patients with ACL, MCL or LCL ... tibia movement and reduce load on ... or add-ons. Supports the injured or ...
... Orthosis Custom-fitted static-progressive orthosis ... Goniometer version has calibrated ... metal contacts skin. Includes ... bag. One size fits ...
... Polyamide Hinge Wraparound design can ... fit. Multilock polyamide hinge prevents ... extension can be set for ... level. Provides medial/lateral support during ...
Medicine Products: