Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Myocardial performance in the newborn lamb.

W Berman, J Musselman

    The American Journal of Physiology
    |July 11, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Newborn lambs exhibit robust myocardial performance, with cardiac output and contractility exceeding adult ewes. This indicates vigorous heart function in neonatal sheep during early life.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    Classification and diagnosis of epileptic seizures.

    Pediatric annals·2014
    Same author

    Transcatheter occlusion of large pulmonary arteriovenous fistula.

    Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions·2000
    Same author

    Significant pulmonary valve incompetence following oversize balloon pulmonary valveplasty in small infants: A long-term follow-up study.

    Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions·1999
    Same author

    Balloon disruption of pulmonary artery band in a child with congenital heart disease.

    Pediatric cardiology·1999
    Same author

    Vessel-sparing technique for coil occlusion of the very small patent ductus arteriosus.

    Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions·1999
    Same author

    Acute Budd-Chiari syndrome caused by percutaneous placement of a transhepatic inferior vena cava catheter.

    Journal of vascular and interventional radiology : JVIR·1997
    Same journal

    Blood coagulation in fish.

    The American journal of physiology·2011
    Same journal

    Renal tubular reabsorption, metabolic utilization and isomeric fractionation of lactic acid in the dog.

    The American journal of physiology·2010
    Same journal

    The inactivation of placental toxin by human serum.

    The American journal of physiology·2010
    Same journal

    Adrenal function following ovariectomy in the rat.

    The American journal of physiology·2010
    Same journal

    Capillary permeability; perfusion of frog and guinea pig hind limbs.

    The American journal of physiology·2010
    Same journal

    Evaluation of protective measures against sunburn.

    The American journal of physiology·2010
    See all related articles

    Area of Science:

    • Cardiology
    • Neonatal Physiology
    • Comparative Physiology

    Background:

    • The cardiovascular system undergoes significant adaptation during the neonatal period.
    • Understanding myocardial function in newborns is crucial for assessing physiological development.

    Purpose of the Study:

    • To compare myocardial performance in newborn lambs with adult ewes during the first three weeks of life.
    • To evaluate key indices of cardiac contractility and output in neonatal sheep.

    Main Methods:

    • Comparative analysis of cardiac function in newborn lambs and adult ewes.
    • Measurement of heart rate, left ventricular preejection period, left ventricular ejection time, cardiac output, stroke work, and left ventricular dP/dtmax.

    Main Results:

    Related Experiment Videos

    • Newborn lambs had a higher heart rate than ewes.
    • Cardiac output per kilogram body weight was substantially higher in lambs (397-274 ml/min/kg) compared to ewes (125 ml/min/kg).
    • Left ventricular dP/dtmax was significantly greater in lambs (3,723 mmHg/s) than in ewes (2,257 mmHg/s), indicating more vigorous myocardial contraction.

    Conclusions:

    • The myocardium of newborn sheep contracts vigorously in vivo.
    • Neonatal sheep heart function equals or exceeds that of adult sheep based on multiple myocardial function indices.
    • These findings highlight the advanced state of myocardial development and performance in newborn sheep.