AMERICAN SOCIETY OF NUCLEAR CARDIOLOGY POSITION
... Attempts by several subspecialty organizations in the past have improved but not resolved these terminology issues. To ultimately resolve these differences, a remarkable committee was convened: The American Heart Association Writing Group on Myocardial Segmentation and Registration for Cardiac Imagi ...
... Attempts by several subspecialty organizations in the past have improved but not resolved these terminology issues. To ultimately resolve these differences, a remarkable committee was convened: The American Heart Association Writing Group on Myocardial Segmentation and Registration for Cardiac Imagi ...
Mapping Reentry - Circulation: Arrhythmia and Electrophysiology
... between the postpacing interval (PPI) measured at the site of stimulation and the tachycardia cycle length (TCL) is an approximate measure of the distance from the mapping site to the circuit. It follows that 2 distant or disparate sites are unlikely to have similar or equal PPIs. As described by Ip ...
... between the postpacing interval (PPI) measured at the site of stimulation and the tachycardia cycle length (TCL) is an approximate measure of the distance from the mapping site to the circuit. It follows that 2 distant or disparate sites are unlikely to have similar or equal PPIs. As described by Ip ...
Echocardiographic assessment of valve stenosis
... B.1.1. Jet velocity. The antegrade systolic velocity across the narrowed aortic valve, or aortic jet velocity, is measured using continuous-wave (CW) Doppler (CWD) ultrasound.8–10 Accurate data recording mandates multiple acoustic windows in order to determine the highest velocity (apical and supras ...
... B.1.1. Jet velocity. The antegrade systolic velocity across the narrowed aortic valve, or aortic jet velocity, is measured using continuous-wave (CW) Doppler (CWD) ultrasound.8–10 Accurate data recording mandates multiple acoustic windows in order to determine the highest velocity (apical and supras ...
Impact of surgical ventricular reconstruction on stroke volume in
... Hospital between October 2001 and July 2008 and who had echocardiograms before surgery and at the time of hospital discharge. A total of 120 of these patients also had echocardiograms performed at a median of 8 months after surgery. Indications for SVR were symptomatic heart failure, angina, or a co ...
... Hospital between October 2001 and July 2008 and who had echocardiograms before surgery and at the time of hospital discharge. A total of 120 of these patients also had echocardiograms performed at a median of 8 months after surgery. Indications for SVR were symptomatic heart failure, angina, or a co ...
Effect of changes in contractility on the index of myocardial
... digoxin on IMP is unknown and may provide some insight into its efficacy. The goals of this study were: [1] to determine the effects of increased contractility on IMP and its components; and [2] to determine whether digoxin, a weak inotrope without an adverse survival benefit, affects IMP and its co ...
... digoxin on IMP is unknown and may provide some insight into its efficacy. The goals of this study were: [1] to determine the effects of increased contractility on IMP and its components; and [2] to determine whether digoxin, a weak inotrope without an adverse survival benefit, affects IMP and its co ...
TEMPORARY PACING – WHEN AND HOW? DR. R. VIJAYAKUMAR
... Pace maker is an artificial device that delivers a timed fixed electrical stimulus to the heart, which results in cardiac depolarisation. These devices keep the heart beating slow when used. The main disadvantage is that they cannot control a faster rate. The indication for temporary pacing can be c ...
... Pace maker is an artificial device that delivers a timed fixed electrical stimulus to the heart, which results in cardiac depolarisation. These devices keep the heart beating slow when used. The main disadvantage is that they cannot control a faster rate. The indication for temporary pacing can be c ...
What is a ‘‘normal’’ right ventricle? Kovalova , *
... were significantly greater than those of the LV (pair t-test, a Z 0.1%). There was no significant difference between indexed SV (SVI) of the RV and LV. This supports the validity of the RV volumetric method used. EF of the RV is significantly lower than that of the LV (pair t-test, a Z 0.1%). When c ...
... were significantly greater than those of the LV (pair t-test, a Z 0.1%). There was no significant difference between indexed SV (SVI) of the RV and LV. This supports the validity of the RV volumetric method used. EF of the RV is significantly lower than that of the LV (pair t-test, a Z 0.1%). When c ...
21_QuizShowQuestions
... a. ligamentum arteriosum, pulmonary valve b. ligamentum arteriosum, tricuspid valve c. conus arteriosus, pulmonary valve d. conus arteriosus, tricuspid valve BACK TO GAME ...
... a. ligamentum arteriosum, pulmonary valve b. ligamentum arteriosum, tricuspid valve c. conus arteriosus, pulmonary valve d. conus arteriosus, tricuspid valve BACK TO GAME ...
Emergency diagnosis and management of acute heart failure
... oxygen saturation of the blood (generally below 90% without oxygenation). Its clinical manifestation is tachypnea, orthopnea (the patient tries to utilize the function of the auxiliary respiratory muscles in a sitting position). In ausculation crackles or ronchi can be heard over the lungs. 3. Hype ...
... oxygen saturation of the blood (generally below 90% without oxygenation). Its clinical manifestation is tachypnea, orthopnea (the patient tries to utilize the function of the auxiliary respiratory muscles in a sitting position). In ausculation crackles or ronchi can be heard over the lungs. 3. Hype ...
Congenital third-degree AV block in the infant with a ventricular rate
... Cons: Two leads required, response is not physiological, loss of larger generator, faster heart AVsynchrony, rates than VVIR, pacemaker mediated tachycardia ...
... Cons: Two leads required, response is not physiological, loss of larger generator, faster heart AVsynchrony, rates than VVIR, pacemaker mediated tachycardia ...
Architecture of fibers of the working myocardium and
... preferential directions through the ventricular mass. We differentiated three different layers of fibres: superficial, middle, and deep. The fibres of the superficial layer have spiral direction. The superficial fibres invaginate into the apex cordis and form the deep layer. The middle layer in both ...
... preferential directions through the ventricular mass. We differentiated three different layers of fibres: superficial, middle, and deep. The fibres of the superficial layer have spiral direction. The superficial fibres invaginate into the apex cordis and form the deep layer. The middle layer in both ...
Right heart failure: toward a common language The Harvard
... ciplinary group of expert physician scientists together to develop an integrative language that effectively captures and describes right heart disease. The development of a common language relevant to scientists and clinicians alike was designed to foster collaborative research initiatives and conjo ...
... ciplinary group of expert physician scientists together to develop an integrative language that effectively captures and describes right heart disease. The development of a common language relevant to scientists and clinicians alike was designed to foster collaborative research initiatives and conjo ...
Comparison of Hemodynamic Effects of Inhaled Milrinone and Inhaled Prostacyclin
... Baxter International, Santa Ana,CA)coupled to a RVEF/thermodilution cardiac output computer (RVEF1,Baxter International) was used. It provided continuous pulmonary artery pressure and central venous pressure monitoring, intermittent pulmonary capillary wedge pressure monitoring, thermodilution cardi ...
... Baxter International, Santa Ana,CA)coupled to a RVEF/thermodilution cardiac output computer (RVEF1,Baxter International) was used. It provided continuous pulmonary artery pressure and central venous pressure monitoring, intermittent pulmonary capillary wedge pressure monitoring, thermodilution cardi ...
Phys Chapter 9 [4-20
... When an action potential passes over the heart muscle membrane, it spreads into the heart muscle fiber along the membranes of the transverse (T) tubules T tubule action potentials get to the membranes of the longitudinal sarcoplasmic tubules to cause release of calcium ions into the muscle sarcoplas ...
... When an action potential passes over the heart muscle membrane, it spreads into the heart muscle fiber along the membranes of the transverse (T) tubules T tubule action potentials get to the membranes of the longitudinal sarcoplasmic tubules to cause release of calcium ions into the muscle sarcoplas ...
... From a molecular standpoint, the developmental mechanisms that underlie HLHS are obscure, as there are no mutations that have been associated robustly with this part of the heart. Despite the existence of rare family clustering of HLHS, linkage analysis has been unproductive.17–20 However, embryolog ...
KS4_The_Heart_and_Circulatory_System
... For example, the oxygen that the body needs, must be taken to the cells and the carbon dioxide waste gas must be taken away from the cells. ...
... For example, the oxygen that the body needs, must be taken to the cells and the carbon dioxide waste gas must be taken away from the cells. ...
Using anatomical intelligence to assess LV function
... Areas that hold great promise include the detection of subclinical heart disease (when other systolic functional parameters are normal), the evaluation of myocardial ischemia and viability, and serial assessment of different cardiomyopathies. ...
... Areas that hold great promise include the detection of subclinical heart disease (when other systolic functional parameters are normal), the evaluation of myocardial ischemia and viability, and serial assessment of different cardiomyopathies. ...
Determinants of the relation between systolic pressure and
... the 22 palients with normal mean right atrial pressure (58 mm H& peak rigbl vcmricular systolic pressure ranged from 20 to 97 mm Hg. The pulmonary valve closure-tricuspi? valve opening interval increased as an approximately I&S function of peak right ventricular systolic pressure (F1: The magnitude ...
... the 22 palients with normal mean right atrial pressure (58 mm H& peak rigbl vcmricular systolic pressure ranged from 20 to 97 mm Hg. The pulmonary valve closure-tricuspi? valve opening interval increased as an approximately I&S function of peak right ventricular systolic pressure (F1: The magnitude ...
Anastomosis in Pulmonary Atresia with Intact Ventricular Septum
... patients with cyanotic congenital heart disease and duct-dependent pulmonary blood flow is technically feasible and provides an effective alternative to surgical systemic-to-pulmonary artery shunts. In RV-dependent coronary circulation oxygen delivery to the myocardium more or less depends on the RV ...
... patients with cyanotic congenital heart disease and duct-dependent pulmonary blood flow is technically feasible and provides an effective alternative to surgical systemic-to-pulmonary artery shunts. In RV-dependent coronary circulation oxygen delivery to the myocardium more or less depends on the RV ...
AS TIMING AND INDICATIONS FOR SURGERY DR
... leaflet motion and a valve area 1.0 cm or less only if clinical, hemodynamic and anatomic data support valve obstruction as the most likely cause of symptoms and data recorded when the patient is normotensive (systolic BP <140 mm Hg) indicate (Level of Evidence: C): a. An aortic velocity less than 4 ...
... leaflet motion and a valve area 1.0 cm or less only if clinical, hemodynamic and anatomic data support valve obstruction as the most likely cause of symptoms and data recorded when the patient is normotensive (systolic BP <140 mm Hg) indicate (Level of Evidence: C): a. An aortic velocity less than 4 ...
Review Article: Tissue Engineering of Semilunar Heart Valves
... walls, which results in an increase in volume, the pressure difference across the valve decreases. During opening of the valve, elastin extends at minimal load in the ventricularis to return the fibrosa in its original corrugated state, facilitated by the spongiosa that dissipates the arising shear ...
... walls, which results in an increase in volume, the pressure difference across the valve decreases. During opening of the valve, elastin extends at minimal load in the ventricularis to return the fibrosa in its original corrugated state, facilitated by the spongiosa that dissipates the arising shear ...
A Method for Determining Left Ventricular Mass in Man
... that is representative or has a relatively constant relation to the thickness of the ventricle as a whole. A segment of the free left ventricutlar wall as visualized on the anteroposterior film was selected, because this is the portion of the ventricular wall that is most often clearly seen and can ...
... that is representative or has a relatively constant relation to the thickness of the ventricle as a whole. A segment of the free left ventricutlar wall as visualized on the anteroposterior film was selected, because this is the portion of the ventricular wall that is most often clearly seen and can ...
Does This Patient Have Aortic Regurgitation?
... Mitral stenosis is associated with a mid-diastolic decrescendo lowfrequency rumble, which, if the patient is in sinus rhythm, may be followed by late-diastolic (presystolic) crescendo that ends with the mitral component of S1 (Figure 2). It is best heard using the bell of the stethoscope placed at t ...
... Mitral stenosis is associated with a mid-diastolic decrescendo lowfrequency rumble, which, if the patient is in sinus rhythm, may be followed by late-diastolic (presystolic) crescendo that ends with the mitral component of S1 (Figure 2). It is best heard using the bell of the stethoscope placed at t ...
Congenital Heart Defects Spring 2015 student copy
... The pulmonary or pulmonic valve is between the right ventricle and the pulmonary artery. It opens to allow blood to flow from the right ventricle to the lungs. A defective pulmonary valve that doesn't open properly is called stenotic. This forces the right ventricle to pump harder than normal to ove ...
... The pulmonary or pulmonic valve is between the right ventricle and the pulmonary artery. It opens to allow blood to flow from the right ventricle to the lungs. A defective pulmonary valve that doesn't open properly is called stenotic. This forces the right ventricle to pump harder than normal to ove ...
Saladin 5e Extended Outline
... 1. At rest, the coronary blood vessels supply the myocardium with about 250 mL of blood per minute, or about 5% of the circulating blood, even though the heart is only 0.5% of the body’s weight. 2. The coronary circulation is the most variable aspect of cardiac anatomy, and its description is the pa ...
... 1. At rest, the coronary blood vessels supply the myocardium with about 250 mL of blood per minute, or about 5% of the circulating blood, even though the heart is only 0.5% of the body’s weight. 2. The coronary circulation is the most variable aspect of cardiac anatomy, and its description is the pa ...
Mitral insufficiency
Mitral insufficiency (MI), mitral regurgitation or mitral incompetence is a disorder of the heart in which the mitral valve does not close properly when the heart pumps out blood. It is the abnormal leaking of blood backwards from the left ventricle, through the mitral valve, into the left atrium, when the left ventricle contracts, i.e. there is regurgitation of blood back into the left atrium. MI is the most common form of valvular heart disease.