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BIOL242Chap18HeartOCT2012
BIOL242Chap18HeartOCT2012

... Figure 20–14b ...
Chapter 18 Heart
Chapter 18 Heart

... – Ventricular cells -90 mV. Threshold = -75mV – Atrial cells: -80 mV ...
Management options for severe aortic stenosis in non
Management options for severe aortic stenosis in non

... from retrospective studies, a randomised controlled trial studying the efficacy of Atorvastatin 80mg in moderate to severe AS (with average AVA of 1.01cm2) showed no significant reduction in disease progression.4 A major trial looking at combined Simvastatin and Ezetimibe also did not demonstrate mu ...
Traumatic ventricular septal defect and tricuspid - Heart
Traumatic ventricular septal defect and tricuspid - Heart

... elevated and showed prominent V waves with accentuated Y descent. The precordium revealed prominent pulsations with a systolic thrill. He was found to have a 4/6 harsh systolic murmur radiating across the sternum. Chest x ray showed cardiomegaly (cardiothoracic ratio of 0.62) with right atrial enlar ...
Chapter 18 Heart
Chapter 18 Heart

... Figure 20–6a ...
Thread-like strand from right atrium into right ventricle - Heart
Thread-like strand from right atrium into right ventricle - Heart

... failure. At necropsy a long fibrous strand was seen extending from the right atrium into the right ventricle, with a ball thrombus freely moving along the strand. In the right atrium there was a small thrombus at the base of this fibrous strand. The myocardium was hypertrophied and there were short ...
THE CARDIAC CYCLE
THE CARDIAC CYCLE

... At the end of this phase the semilunar (aortic and pulmonary) valves close. After the peak in ventricular and arterial pressures (red and green), blood flow out of the ventricles decreases and ventricular volume decreases more slowly (white). When the pressure in the ventricles falls below the press ...
A2-Cardiac Anatomy
A2-Cardiac Anatomy

... repolarization, and extends from the end of the QRS interval to the beginning of the T wave • Elevation or depression may indicate heart damage such as myocardial infarction (MI) • QT interval represents the total time required for depolarization and repolarization of the ventricles, and extends fro ...
CARDIOVASCULAR PHYSIOLOGY PART 1. HEART
CARDIOVASCULAR PHYSIOLOGY PART 1. HEART

... lasts no more than 0.1 seconds but has a large amplitude (variable to 1.3mV). This is followed by the S-T segment (0.12 sec) during which time the ventricles are reaching their maximum contraction but are not generating any electrical activity. Finally comes the T wave which represents the electrica ...
Mitral Stenosis Etiology
Mitral Stenosis Etiology

... Patients with MS typically present more than 20 years after an episode of rheumatic fever. It is  unclear if it is the initial infection combined with continued turbulent flow over the valve or if  there is a smoldering rheumatic process that continues.  Progressive thickening, scarring, and  calcif ...
Gross Anatomy of the Heart
Gross Anatomy of the Heart

... – Fluid dynamics depend on pressure & resistance – Pressure is measured here in mmHg = Torr by the sphygmomanometer ...
SALADIN CHAPTER 19 Cardiovascular System/Heart
SALADIN CHAPTER 19 Cardiovascular System/Heart

... – Fluid dynamics depend on pressure & resistance – Pressure is measured here in mmHg = Torr by the sphygmomanometer ...
Use of the mitraclip device in practice
Use of the mitraclip device in practice

... Despite the elevated risk scores documented with logistic EuroSCORE and STS scores plus additional comorbidities, which were not adequately focused on in these mortality estimations (ie, therapeutic radiation exposure, neoplasm, age older than 90 years, and frailty), the in-hospital mortality rate w ...
Transcatheter Aortic Valve Replacement
Transcatheter Aortic Valve Replacement

... Ongoing UVM Research: CoreValve® SURTAVI Trial Revised Enrollment: 3% or higher risk per CT surgeon. • Evaluate the safety and efficacy of TAVI in Subjects with severe, symptomatic AS at intermediate surgical risk by randomizing Subjects to either SAVR or TAVI with the ...
New diagnostic and technical aspects of fetal phonocardiography
New diagnostic and technical aspects of fetal phonocardiography

... of distinct events, such as the opening and closing of the heart valves. Consequently the diagnostic potential was restricted to parameters related to the heart rate and the cardiac time intervals. This restriction was exacerbated by the disastrous quality of the available phonotransducers. Conventi ...
HYBRID CARDIOVASCULAR SIMULATOR PERFORMANCE
HYBRID CARDIOVASCULAR SIMULATOR PERFORMANCE

... approximation of real entire system behavior. Although, is much better if rather than use a VAD model, we could connect a real device directly to the simulator. On the other hand, physical simulators has advantage in connecting real devices under evaluation, however if system modifications are neces ...
THE HUMAN HEART
THE HUMAN HEART

... The heart is one of the most important organs in the human body. All day and all night, cells take in nutrients and oxygen and excrete wastes. The cardiovascular system, which includes the heart, provides a transport system that keeps blood in continuous circulation to supply nutrients and remove ej ...
THE HUMAN HEART
THE HUMAN HEART

... The heart is one of the most important organs in the human body. All day and all night, cells take in nutrients and oxygen and excrete wastes. The cardiovascular system, which includes the heart, provides a transport system that keeps blood in continuous circulation to supply nutrients and remove ej ...
Mitral Valve Prolapse
Mitral Valve Prolapse

... Standing decreases venous return, reducing ventricular size, resulting in earlier and more marked prolapse of the redundant mitral leaflet, and hence earlier and more often louder clicks and murmur. Squatting, by increasing peripheral resistance and hence afterload, increases ventricular size, and t ...
Chapter 21 - heart - Fullfrontalanatomy.com
Chapter 21 - heart - Fullfrontalanatomy.com

... 70 trillion cells. Each of these cells are individual lives! They need food, water, vitamins, hormones and they excrete waste. Unicellular animals get all of that from their environment. Mulitcellular organisms need mechanisms which mimic an external environment. This is there the cardiovascular sys ...
heart - Greer Middle College
heart - Greer Middle College

... from control = slower heart beat • Slower heart beat can lead to fibrillation • Fibrillation = lack of blood flow to the heart • Tachycardia = more than 100 beats/min ...
Cardiovascular Anatomy Physiology
Cardiovascular Anatomy Physiology

... stroke volume times the heart rate.    Chemoreceptors: Are sensors that detect abnormal changes in oxygen, carbon dioxide and hydrogen ion concentration  in the blood stream.    Conductive Cells: Electrical cells that initiate electrical activity and conduct it through the heart.  Contracting Cells: ...
The ECG hypertrophy of the right atrium and the right ventricle, the
The ECG hypertrophy of the right atrium and the right ventricle, the

... closing the aortic valve and the pulmonary artery, as well as the tone of the opening of the mitral and tricuspid valves. ...
Visualization of blood flow with echocardiography: the future for
Visualization of blood flow with echocardiography: the future for

... When this geometric arrangement is broken, for example in dilated left ventricles, undesirable vortices develop and there is an increase in the dissipated energy [9] . In end-stage systolic HF, ventricular dilatation decreases the strength of the diastolic vortex [16] . ...
Assessment of the Morphologic Right Ventricular Function after the
Assessment of the Morphologic Right Ventricular Function after the

... Congenitally Corrected Transposition of the Great Arteries (CCTGA) is a rare cardiac anomaly with an incidence of less than 1% in patients with congenital heart disease. Most cases are associated with Ventricular Septal Defect (VSD) as the most common then surgical procedure is performed in childhoo ...
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Artificial heart valve



An artificial heart valve is a device implanted in the heart of a patient with valvular heart disease. When one of the four heart valves malfunctions, the medical choice may be to replace the natural valve with an artificial valve. This requires open-heart surgery.Valves are integral to the normal physiological functioning of the human heart. Natural heart valves are evolved to forms that perform the functional requirement of inducing unidirectional blood flow through the valve structure from one chamber of the heart to another. Natural heart valves become dysfunctional for a variety of pathological causes. Some pathologies may require complete surgical replacement of the natural heart valve with a heart valve prosthesis.
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