Modeling a Heart Pump
... Pressure is being built up in this phase, until the left ventricular pressure rises sufficiently above the aortic pressure to open the aortic valve. 2. Ejection phase, when the mitral valve is closed and the aortic valve is open. Blood flows out of the chamber into the aorta. 3. Isovolumic relaxatio ...
... Pressure is being built up in this phase, until the left ventricular pressure rises sufficiently above the aortic pressure to open the aortic valve. 2. Ejection phase, when the mitral valve is closed and the aortic valve is open. Blood flows out of the chamber into the aorta. 3. Isovolumic relaxatio ...
Surgical Management of Traumatic Aorta
... and colleagues [3]. In our case, the time interval between injury and complete repair was 4 years. All patients with traumatic aorta-right ventricular fistula combined with aortic insufficiency were operated on sooner or later, as reported in the review by Samuels and colleagues [4]. It has been con ...
... and colleagues [3]. In our case, the time interval between injury and complete repair was 4 years. All patients with traumatic aorta-right ventricular fistula combined with aortic insufficiency were operated on sooner or later, as reported in the review by Samuels and colleagues [4]. It has been con ...
Periodicities of cardiac mechanics
... of the contracting myocardium, such as the calcium flux (2, 3), whereasothers have suggestedthat oscillations of the venous return or the afterload are responsible for these mechanical periodicities (5,6,12,14,17,26). Because the mechanical action of the heart can be describedby its pressure-volumer ...
... of the contracting myocardium, such as the calcium flux (2, 3), whereasothers have suggestedthat oscillations of the venous return or the afterload are responsible for these mechanical periodicities (5,6,12,14,17,26). Because the mechanical action of the heart can be describedby its pressure-volumer ...
AS and A Level Biology Lesson Element - Cardiovascular
... © OCR 2016 - This resource may be freely copied and distributed, as long as the OCR logo and this message remain intact and OCR is acknowledged as the originator of this work. OCR acknowledges the use of the following content: n/a Please get in touch if you want to discuss the accessibility of resou ...
... © OCR 2016 - This resource may be freely copied and distributed, as long as the OCR logo and this message remain intact and OCR is acknowledged as the originator of this work. OCR acknowledges the use of the following content: n/a Please get in touch if you want to discuss the accessibility of resou ...
2 Hemodynamic Theory on SICP
... decrease in thoracic pressure does not occur. Rather, the force of the air INCREASES thoracic pressure • In this situation, there will be an increase in atrial a, v, and mean pressures with inhalation. • Only pressures recorded on end exhalation should be measured and used for calculations on a pati ...
... decrease in thoracic pressure does not occur. Rather, the force of the air INCREASES thoracic pressure • In this situation, there will be an increase in atrial a, v, and mean pressures with inhalation. • Only pressures recorded on end exhalation should be measured and used for calculations on a pati ...
Sex variations in the structure of human atrioventricular annuli
... and cellularity, may predispose to annular insufficiency and valvular incompetence. These pathologies occur more commonly in females, although the anatomical basis for this disparity is unclear. Sex variation in the structure of the annuli is important in providing a morphological basis for the patt ...
... and cellularity, may predispose to annular insufficiency and valvular incompetence. These pathologies occur more commonly in females, although the anatomical basis for this disparity is unclear. Sex variation in the structure of the annuli is important in providing a morphological basis for the patt ...
Left Ventricle
... • Right auricle projects anteriorly from superior corner of atrium • Opens into right ventricle via tricuspid valve (right atrioventricular valve) © 2014 Pearson Education, Inc. ...
... • Right auricle projects anteriorly from superior corner of atrium • Opens into right ventricle via tricuspid valve (right atrioventricular valve) © 2014 Pearson Education, Inc. ...
ecg rhythm interpretation primer - Twin Cities Health Professionals
... Heart Valves When blood flows through the heart, it follows a unidirectional pattern. There are four different valves within the myocardium and their functions are to assure blood flows from the right to left side of the myocardium and always in a “forward” direction. The two valves found between th ...
... Heart Valves When blood flows through the heart, it follows a unidirectional pattern. There are four different valves within the myocardium and their functions are to assure blood flows from the right to left side of the myocardium and always in a “forward” direction. The two valves found between th ...
Heart - Dr Magrann
... the same bed, on Sunday morning, at about 11:00 a.m., regardless of their medical condition. This puzzled the doctors and some even thought it had something to do with the supernatural. No one could solve the mystery as to why the deaths occurred around 11:00 a.m. on Sunday, so a Worldwide team of e ...
... the same bed, on Sunday morning, at about 11:00 a.m., regardless of their medical condition. This puzzled the doctors and some even thought it had something to do with the supernatural. No one could solve the mystery as to why the deaths occurred around 11:00 a.m. on Sunday, so a Worldwide team of e ...
Heart Parts Activity - Delaware Access Project
... the atrium and ventricle is closed. As it opens to allow blood to flow into the ventricle, the valve between the ventricle and pulmonary artery closes. Occasionally a valve is not formed correctly at birth or deteriorates due to medications or disease and does not close completely. This can be heard ...
... the atrium and ventricle is closed. As it opens to allow blood to flow into the ventricle, the valve between the ventricle and pulmonary artery closes. Occasionally a valve is not formed correctly at birth or deteriorates due to medications or disease and does not close completely. This can be heard ...
Derived copy of Heart Anatomy
... Although the ventricles on the right and left sides pump the same amount of blood per contraction, the muscle of the left ventricle is much thicker and better developed than that of the right ventricle. In order to overcome the high resistance required to pump blood into the long systemic circuit, t ...
... Although the ventricles on the right and left sides pump the same amount of blood per contraction, the muscle of the left ventricle is much thicker and better developed than that of the right ventricle. In order to overcome the high resistance required to pump blood into the long systemic circuit, t ...
Chapter 18 power point
... 1 Blood returning to the heart fills atria, pressing against the AV valves. The increased pressure forces AV ...
... 1 Blood returning to the heart fills atria, pressing against the AV valves. The increased pressure forces AV ...
Echocardiographic studies of the motion of the mitral valve in
... rates of 110 to 170 impulses per minute. These investigators8 found cyclic variations in the peak velocity of aortic blood flow that generally varied directly with the length of the preceding cycle and inversely with the P-R interval. The variations in the peak velocity of aortic blood flow and the ...
... rates of 110 to 170 impulses per minute. These investigators8 found cyclic variations in the peak velocity of aortic blood flow that generally varied directly with the length of the preceding cycle and inversely with the P-R interval. The variations in the peak velocity of aortic blood flow and the ...
Aortic Stenosis and Comorbidities
... • A moderate to severe CKD was detected in over 50% of pts by means of eGFR, despite a normal or only mildly elevated serum creatinine • Serum creatinine is commonly included in risk scores, such as logistic EuroSCORE, ...
... • A moderate to severe CKD was detected in over 50% of pts by means of eGFR, despite a normal or only mildly elevated serum creatinine • Serum creatinine is commonly included in risk scores, such as logistic EuroSCORE, ...
0132873559_CH_08 - Fullfrontalanatomy.com
... The two major parts of the cardiovascular system 1. The heart—hollow muscular pump located in the thoracic cavity 2. Blood vessels—transport blood throughout the body Other parts of the cardiovascular system 1. Pericardial sac, or parietal pericardium—the thick, parchmentlike membrane that covers t ...
... The two major parts of the cardiovascular system 1. The heart—hollow muscular pump located in the thoracic cavity 2. Blood vessels—transport blood throughout the body Other parts of the cardiovascular system 1. Pericardial sac, or parietal pericardium—the thick, parchmentlike membrane that covers t ...
Peer Teaching Cardio
... • Ventricular pressure> Atrial pressure • Causing the semi lunar valves to open. ISOVOLUMETRIC RELAXATION (DIASTOLE) • Both semi lunar and AV valves are closed • When ventricular pressure < atrial pressure, AV valves open ...
... • Ventricular pressure> Atrial pressure • Causing the semi lunar valves to open. ISOVOLUMETRIC RELAXATION (DIASTOLE) • Both semi lunar and AV valves are closed • When ventricular pressure < atrial pressure, AV valves open ...
Cardiac Auscultation
... • Similar to MS, except increases with Respiration (Carvallo’s Sign) • Best Heard at Left Lower Sternal Edge ...
... • Similar to MS, except increases with Respiration (Carvallo’s Sign) • Best Heard at Left Lower Sternal Edge ...
Congestive Heart Failure
... Faulty heart valves - Valves control the flow of blood into and out of the heart as well as between the compartments or chambers of the heart (atria and ventricles). A damaged valve may force the heart to work harder to keep the blood flowing properly. This problem can cause the heart to weaken over ...
... Faulty heart valves - Valves control the flow of blood into and out of the heart as well as between the compartments or chambers of the heart (atria and ventricles). A damaged valve may force the heart to work harder to keep the blood flowing properly. This problem can cause the heart to weaken over ...
detailed lecture outline
... Pressure and volume change during the cardiac cycle: 8 steps are shown in the figure. 1. Atrial Systole: Atrial contraction begins. Right and left AV valves are open. 2. Atria eject blood into the ventricles, filling the ventricles. 3. Atrial systole ends: AV valves close. Ventricles contain maxim ...
... Pressure and volume change during the cardiac cycle: 8 steps are shown in the figure. 1. Atrial Systole: Atrial contraction begins. Right and left AV valves are open. 2. Atria eject blood into the ventricles, filling the ventricles. 3. Atrial systole ends: AV valves close. Ventricles contain maxim ...
Sequential Segmental Analysis of the Heart: A Malformation
... right ventricle are more coarse than that of the left ventricle and there is typically a muscle bar in the right ventricle, the moderator band. In contrast, the morpohologically left ventricle is characterized by smooth walls with fine apical trabeculations. Another feature of the right ventricle is ...
... right ventricle are more coarse than that of the left ventricle and there is typically a muscle bar in the right ventricle, the moderator band. In contrast, the morpohologically left ventricle is characterized by smooth walls with fine apical trabeculations. Another feature of the right ventricle is ...
Transcatheter Aortic Valve Implantation, Patient Selection Process
... to conduct TAVI truly percutaneously. Such an intervention is feasible only when vascular access is acquired through a femoral artery, and it may be performed under either general or local anaesthesia. A more precise term for this procedure is percutaneous aortic valve replacement (PAVR), rather tha ...
... to conduct TAVI truly percutaneously. Such an intervention is feasible only when vascular access is acquired through a femoral artery, and it may be performed under either general or local anaesthesia. A more precise term for this procedure is percutaneous aortic valve replacement (PAVR), rather tha ...
Mitral Valve Obstruction and Pulmonary Hypertension
... In reviewing some of the largest surgical series, Lukacs et al. [5], over a 20 year period operated on 50 myxomas, with 42 (84%) in the LA, and operative mortality of 10% primarily from low cardiac output syndrome. Hanson et al. [6] with a 24 year review of 33 patients with atrial myxomas reported 3 ...
... In reviewing some of the largest surgical series, Lukacs et al. [5], over a 20 year period operated on 50 myxomas, with 42 (84%) in the LA, and operative mortality of 10% primarily from low cardiac output syndrome. Hanson et al. [6] with a 24 year review of 33 patients with atrial myxomas reported 3 ...
Endocarditis - Patient Education Institute
... Endocarditis is an inflammation of the endocardium, or the heart’s inner lining. It can damage the valves in the heart and lead to other complications. If left untreated, it can be life threatening. Endocarditis is caused by bacteria, fungi, or other germs. If these germs invade the bloodstream, the ...
... Endocarditis is an inflammation of the endocardium, or the heart’s inner lining. It can damage the valves in the heart and lead to other complications. If left untreated, it can be life threatening. Endocarditis is caused by bacteria, fungi, or other germs. If these germs invade the bloodstream, the ...
Giant left atrial myxoma mimicking severe mitral valve stenosis and
... size, location and mobility of myxoma termine the seriousness of mitral valve obstruction. The smptoms vary from dyspnea due to heart failure or syncope to sudden death due complete mitral obstruction [2-5]. Up to more than a half of left atrial myxomas show obstructive symptoms [3], but only in 10% ...
... size, location and mobility of myxoma termine the seriousness of mitral valve obstruction. The smptoms vary from dyspnea due to heart failure or syncope to sudden death due complete mitral obstruction [2-5]. Up to more than a half of left atrial myxomas show obstructive symptoms [3], but only in 10% ...
Chapter 21: Blood Vessels and Circulation
... Ventricular diastole—early: As ventricles relax, pressure in ventricles drops; blood flows back against cusps of semilunar valves and forces them closed. Blood flows into the relaxed atria. ...
... Ventricular diastole—early: As ventricles relax, pressure in ventricles drops; blood flows back against cusps of semilunar valves and forces them closed. Blood flows into the relaxed atria. ...
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.