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Echocardiography, Doppler, Color: Echocardiography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image.

Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction

1Division Woman and Child, Department Women, University Hospitals Leuven, 2The Ritchie Centre, Monash Institute of Medical Research, Department of Obstetrics and Gynaecology, Monash University, Victoria, Australia, 3Department of Cardiovascular Sciences, Katholieke Universiteit Leuven, 4Fetal and Perinatal Medicine Research Group, Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS), 5Maternal-Fetal Medicine Department, ICGON, Hospital Clínic, Universitat de Barcelona, Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER)

JoVE 50392


 Medicine

Quantification of Global Diastolic Function by Kinematic Modeling-based Analysis of Transmitral Flow via the Parametrized Diastolic Filling Formalism

1Department of Biomedical Engineering, Washington University in St. Louis, 2Department of Physics, Washington University in St. Louis, 3Division of Biology and Biomedical Sciences, Washington University in St. Louis, 4Department of Medicine, Cardiovascular Division, Washington University in St. Louis, 5Cardiovascular Biophysics Lab, Washington University in St. Louis

JoVE 51471


 Bioengineering

High-frequency High-resolution Echocardiography: First Evidence on Non-invasive Repeated Measure of Myocardial Strain, Contractility, and Mitral Regurgitation in the Ischemia-reperfused Murine Heart

1Department of Surgery, The Ohio State University, 2Heart and Lung Research Institute, The Ohio State University, 3Department of Cardiovascular Medicine, The Ohio State University

JoVE 1781


 Medicine

Primary Outcome Assessment in a Pig Model of Acute Myocardial Infarction

1Department of Experimental Cardiology, University Medical Center Utrecht, 2Department of Cardiology, University Medical Center Utrecht, 3Department of Clinical Chemistry and Hematology, University Medical Center Utrecht, 4Interuniversity Cardiology Institutes of the Netherlands (ICIN)

JoVE 54021


 Medicine

Increasing Pulmonary Artery Pulsatile Flow Improves Hypoxic Pulmonary Hypertension in Piglets

1Department of Medicine, Pulmonary Hypertension Research Group (CRIUCPQ), Laval University, 2Institut National de la Recherche Agronomique, 3Université Diderot Paris, Sorbonne Paris Cité, 4Hôpital Lariboisière, Physiologie clinique Explorations Fonctionnelles, 5INSERM U 965, 6Service de Cardiologie, Centre Hospitalier Universitaire Tours

JoVE 52571


 Medicine

Assessment of Pulmonary Capillary Blood Volume, Membrane Diffusing Capacity, and Intrapulmonary Arteriovenous Anastomoses During Exercise

1Division of Pulmonary Medicine, University of Alberta, 2Faculty of Physical Education and Recreation, University of Alberta, 3Divisions of Critical Care and Cardiology, University of Alberta, 4Faculty of Rehabilitation Medicine, University of Alberta, 5G.F. MacDonald Centre for Lung Health

JoVE 54949


 Medicine

An Experimental Protocol for Assessing the Performance of New Ultrasound Probes Based on CMUT Technology in Application to Brain Imaging

1Department of Electrical, Computer and Biomedical Engineering, University of Pavia, 2Department of Information Engineering, University of Florence, 3Department of Engineering, Roma Tre University, 4FTMTR&D/SPA, STMicroelectronics, 5Brain Connectivity Center, BCC, Istituto Neurologico Nazionale Fondazione C. Mondino I.R.C.C.S., 6Department of Molecular Medicine - Unit of Pathology, University of Pavia, Foundation IRCCS Policlinico San Matteo

JoVE 55798


 Bioengineering

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State of the Art Cranial Ultrasound Imaging in Neonates

1Department of Pediatrics, Division of Neonatology, Erasmus MC-Sophia Children's Hospital, 2Department of Radiology, Erasmus MC-Sophia Children's Hospital, 3Department of Pediatrics, Division of Neonatology, UZ Brussel, 4Department of Pediatrics, Division of Neonatology, Leiden University Medical Center, 5Department of Pediatrics, Division of Neonatology, Isala Hospital, 6Department of Pediatrics, Koningin Paola Children's Hospital

JoVE 52238


 Medicine

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Near-infrared Navigation System for Real-time Visualization of Blood Flow in Vascular Grafts

1Department of Radiology, University of Missouri, 2Office of Animal Resources, University of Missouri, 3Bioengineering, University of Missouri, 4Biomedical Science, University of Missouri, 5Surgery - Division of Cardiothoracic Surgery, University of Missouri, 6MU-iCATS, University of Missouri, 7Medical Pharmacology and Physiology, University of Missouri

Video Coming Soon

JoVE 54927


 JoVE In-Press

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Peripheral Vascular Exam Using a Continuous Wave Doppler

JoVE 10123

Source: Joseph Donroe, MD, Internal Medicine and Pediatrics, Yale School of Medicine, New Haven, CT

Peripheral vascular disease (PVD) is a common condition affecting older adults and includes disease of the peripheral arteries and veins. While the history and physical exam offer clues to its diagnosis, Doppler ultrasound has become a routine part of the bedside vascular examination. The video titled "The Peripheral Vascular Exam" gave a detailed review of the physical examination of the peripheral arterial and venous systems. This video specifically reviews the bedside assessment of peripheral arterial disease (PAD) and chronic venous insufficiency using a handheld continuous wave Doppler. The handheld Doppler (HHD) is a simple instrument that utilizes continuous transmission and reception of ultrasound (also referred to as continuous wave Doppler) to detect changes in blood velocity as it courses through a vessel. The Doppler probe contains a transmitting element that emits ultrasound and a receiving element that detects ultrasound waves (Figure 1). The emitted ultrasound is reflected off of moving blood and back to the probe at a frequency directly related to the velocity of blood flow. The reflected signal is detected and transduced to an audible sound with a frequen


 Physical Examinations I

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Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

1Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, 2Department of Echocardiography, Shanghai Institute of Medical imaging, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, 3Department of Cardiac surgery, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University

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JoVE 56439


 JoVE In-Press

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Sound Waves and Doppler Shift

JoVE 10411

Source: Arianna Brown, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA

Waves are disturbances that propagate through a material medium or empty space. Light waves can travel through a vacuum and some forms of matter, and are transverse in nature, which means that the oscillations are perpendicular to the direction of propagation. However, sound waves are pressure waves that travel through an elastic medium like air, and are longitudinal in nature, which means the oscillations are parallel to the direction of propagation. When sound is introduced to a medium by a vibrating object, like the vocal chords of a person or strings in a piano, the particles in the air experience forward and backward motion as the vibrating object moves forward and backward. This results in regions in the air where the air particles are compressed together, called compressions, and other regions where they are spread apart, called rarefactions. The energy created by a sound wave oscillates between the potential energy created by the compressions and the kinetic energy of the small movements and speeds of the particles of the medium. Compressions and rarefactions can be used to define the relationship be


 Physics II

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Shunt Surgery, Right Heart Catheterization, and Vascular Morphometry in a Rat Model for Flow-induced Pulmonary Arterial Hypertension

1Center for Congenital Heart Diseases, Department of Pediatric Cardiology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, 2Research and Development Facility, University Medical Center Groningen, University of Groningen

JoVE 55065


 Medicine

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