Ultrafast Computed Tomography Analysis of Regional Radius
... Background. This study tested two hypotheses: 1) regional left ventricular radius-to-wall thickness ratios (R/T) are uniform in normal subjects, and 2) patients with left ventricular hypertrophy secondary to compensated volume overload normalize global and regional RIT. Methods and Results. Ultrafas ...
... Background. This study tested two hypotheses: 1) regional left ventricular radius-to-wall thickness ratios (R/T) are uniform in normal subjects, and 2) patients with left ventricular hypertrophy secondary to compensated volume overload normalize global and regional RIT. Methods and Results. Ultrafas ...
Four-dimensional blood flow-specific markers of LV dysfunction in dilated cardiomyopathy
... dismal, with 5-year survival rates worse than many of the most common cancers.1 Cardiac remodelling is a key component of HF that progresses from adaptive to maladaptive as the disease worsens, and is associated with increased risks of symptoms and mortality.2 Patients with early or mild HF are ofte ...
... dismal, with 5-year survival rates worse than many of the most common cancers.1 Cardiac remodelling is a key component of HF that progresses from adaptive to maladaptive as the disease worsens, and is associated with increased risks of symptoms and mortality.2 Patients with early or mild HF are ofte ...
Experimental Models of Heart Failure
... As in mice, the left anterior descending coronary artery can be ligated in rats. Extensive infarction is produced. LV geometry and function can be analyzed by echocardiography and pressure/volume loop analysis with an intracardiac pressure-conductance catheter. Five weeks after ligation, dilatation ...
... As in mice, the left anterior descending coronary artery can be ligated in rats. Extensive infarction is produced. LV geometry and function can be analyzed by echocardiography and pressure/volume loop analysis with an intracardiac pressure-conductance catheter. Five weeks after ligation, dilatation ...
Tei Index as a Method of Evaluating Left Ventricular Diastolic
... successful as far as the severity of LV diastolic dysfunction17 is concerned. In a recent study17 we found for the first time a “pseudonormalisation” of the LV index in a subgroup of patients with acute myocardial infarction (AMI) and diastolic dysfunction of restrictive physiology. Recently, Bruch ...
... successful as far as the severity of LV diastolic dysfunction17 is concerned. In a recent study17 we found for the first time a “pseudonormalisation” of the LV index in a subgroup of patients with acute myocardial infarction (AMI) and diastolic dysfunction of restrictive physiology. Recently, Bruch ...
“Diastolic heart failure” or heart failure caused by - Heart
... limit of normal) have a 25% mortality rate at one year. This may be one explanation for the hitherto surprising observation that patients with heart failure and a normal left ventricular ejection fraction, around 25% of whom we would suggest have reduced systolic AV plane displacement, have a poor o ...
... limit of normal) have a 25% mortality rate at one year. This may be one explanation for the hitherto surprising observation that patients with heart failure and a normal left ventricular ejection fraction, around 25% of whom we would suggest have reduced systolic AV plane displacement, have a poor o ...
Low-Flow, Low-Gradient Aortic Stenosis With Normal and
... heart disease. In both cases, the decrease in gradient relative to AS severity is due to a reduction in transvalvular flow. The main challenge in patients with depressed LVEF is to distinguish between true severe versus pseudosevere stenosis and to accurately assess the severity of myocardial impair ...
... heart disease. In both cases, the decrease in gradient relative to AS severity is due to a reduction in transvalvular flow. The main challenge in patients with depressed LVEF is to distinguish between true severe versus pseudosevere stenosis and to accurately assess the severity of myocardial impair ...
Assessment of Left Ventricular Function in Secundum Atrial Septa1
... Left ventricular volume data were determined after biplane left ventricular angiocardiography in the A P and lateral projections using 75% Hypaque (35) (1.0 ml/kg) injected at a rate of 16-20 mlJsec. The filming was programmed for 6 frames/sec. Calculations of end-diastolic and end-systolic volumes ...
... Left ventricular volume data were determined after biplane left ventricular angiocardiography in the A P and lateral projections using 75% Hypaque (35) (1.0 ml/kg) injected at a rate of 16-20 mlJsec. The filming was programmed for 6 frames/sec. Calculations of end-diastolic and end-systolic volumes ...
Pulsus paradoxus - European Respiratory Journal
... increase in ventricular preload is associated with an increase in stroke volume (so‐called preload‐dependency condition). This latter phenomenon explains the increase in right ventricular (RV) stroke volume (SV) and pulmonary arterial flow [2, 4] that occur at in ...
... increase in ventricular preload is associated with an increase in stroke volume (so‐called preload‐dependency condition). This latter phenomenon explains the increase in right ventricular (RV) stroke volume (SV) and pulmonary arterial flow [2, 4] that occur at in ...
KlInIčnI prImer/CASe reporT
... the aneurysm reaches 5 cm or 4.5 cm if concomitant aortic valve regurgitation or stenosis is present. The surgical treatment of these patients is technically challenging and carries a high morbidity and mortality risk, espeWhile the symptomatic aneurysms must cially when compression or erosion of th ...
... the aneurysm reaches 5 cm or 4.5 cm if concomitant aortic valve regurgitation or stenosis is present. The surgical treatment of these patients is technically challenging and carries a high morbidity and mortality risk, espeWhile the symptomatic aneurysms must cially when compression or erosion of th ...
Measurement of right ventricular volume in healthy term and preterm
... persistent pulmonary hypertension of the newborn and respiratory distress syndrome.8 Right ventricular pathophysiology is potentially important in these conditions. The ability of the right ventricle to maintain adequate pulmonary blood flow despite increased pulmonary vascular resistance may be cri ...
... persistent pulmonary hypertension of the newborn and respiratory distress syndrome.8 Right ventricular pathophysiology is potentially important in these conditions. The ability of the right ventricle to maintain adequate pulmonary blood flow despite increased pulmonary vascular resistance may be cri ...
Cardiac - JRC-DMS
... Section III: The Echocardiographic Examination ............................................................................ 10 Section IV: Principles of Cardiac Hemodynamics and Cardiac Cycle ........................................... 20 Section V: Ventricular Function ............................. ...
... Section III: The Echocardiographic Examination ............................................................................ 10 Section IV: Principles of Cardiac Hemodynamics and Cardiac Cycle ........................................... 20 Section V: Ventricular Function ............................. ...
The Responses of Cardiac Sympathetic Nerve Activity to Changes in
... while volume expansion was associated with a significant decrease in CSNA. In contrast, both these responses were severely blunted in HF, with no significant changes in CSNA during either hemorrhage or volume expansion. Decreases in cardiac filling pressures in normal animals The present finding tha ...
... while volume expansion was associated with a significant decrease in CSNA. In contrast, both these responses were severely blunted in HF, with no significant changes in CSNA during either hemorrhage or volume expansion. Decreases in cardiac filling pressures in normal animals The present finding tha ...
Single Coronary Artery from Single Sinus in Complete Transposition
... since birth. Baby is third sibling of her parent. Baby was consulted by her parents with pediatrician during the past 15 day and was given antibiotics for the same. Subsequently baby got admitted as there was no improvement in her respiratory distress and cyanosis. On examination her heart rate was ...
... since birth. Baby is third sibling of her parent. Baby was consulted by her parents with pediatrician during the past 15 day and was given antibiotics for the same. Subsequently baby got admitted as there was no improvement in her respiratory distress and cyanosis. On examination her heart rate was ...
Using the Surface Electrocardiogram to Localize the Origin of
... Anatomical considerations: It may seem surprising that VT can originate from the aortic sinuses since they are not traditionally thought to be associated with ventricular myocardium. However, crescent fibers of ventricular myocardium that have been identified at the base of the left- and right-aorti ...
... Anatomical considerations: It may seem surprising that VT can originate from the aortic sinuses since they are not traditionally thought to be associated with ventricular myocardium. However, crescent fibers of ventricular myocardium that have been identified at the base of the left- and right-aorti ...
Mechanisms for increasing stroke volume during static
... determine the mechanism by which SV increases during static exercise when the HR response is abolished in patients with normal ventricular function. Previously, Alexander et al. (1) speculated that the compensatory increase in SV during exercise with fixed HR could be explained by the Frank-Starling ...
... determine the mechanism by which SV increases during static exercise when the HR response is abolished in patients with normal ventricular function. Previously, Alexander et al. (1) speculated that the compensatory increase in SV during exercise with fixed HR could be explained by the Frank-Starling ...
Immediate Hemodynamic Response of Patients with
... A striking change was noted in the contour of the dye-dilution curves after pacing. At the idioventricular rhythm the disappearance slope of the curves was greatly prolonged with a low peak concentration. After pacing, the dye curves assumed a more normal configuration, with a steeper disappearance ...
... A striking change was noted in the contour of the dye-dilution curves after pacing. At the idioventricular rhythm the disappearance slope of the curves was greatly prolonged with a low peak concentration. After pacing, the dye curves assumed a more normal configuration, with a steeper disappearance ...
Recent Advances in Neonatal Cardiac Surgery
... septum, dilated left ventricle with severe mitral regurgitation/aortic stenosis/restrictive or intact atrial septum, and pulmonary atresia/intact ventricular septum (PA/IVS). Optimal techniques for open surgical repair of CHD before birth have not been developed and appropriate candidates have not b ...
... septum, dilated left ventricle with severe mitral regurgitation/aortic stenosis/restrictive or intact atrial septum, and pulmonary atresia/intact ventricular septum (PA/IVS). Optimal techniques for open surgical repair of CHD before birth have not been developed and appropriate candidates have not b ...
Myocardial Function and Coronary Blood Flow Response to Acute
... Change of temperature was detected by the thermistor in the pulmonary artery and displayed on the recorder through a Wheatstone bridge; the area of the curve was computed manually for cardiac output calculation. Left ventricular injection fraction was obtained in duplicate from the left ventricular ...
... Change of temperature was detected by the thermistor in the pulmonary artery and displayed on the recorder through a Wheatstone bridge; the area of the curve was computed manually for cardiac output calculation. Left ventricular injection fraction was obtained in duplicate from the left ventricular ...
Cardiac Arrhythmias and Their Electrocardiographic Interpretation
... Atrial Flutter … Figure 13-21 shows a typical electrocardiogram in atrial flutter. The P waves are strong because of contraction of semicoordinate masses of muscle. However, note in the record that a QRS-T complex follows an atrial P wave only once for every two to three beats of the atria, giving ...
... Atrial Flutter … Figure 13-21 shows a typical electrocardiogram in atrial flutter. The P waves are strong because of contraction of semicoordinate masses of muscle. However, note in the record that a QRS-T complex follows an atrial P wave only once for every two to three beats of the atria, giving ...
The valve of the inferior vena cava‖ . Br. Heart J., 1956, July, 18 (3)
... cardiac veins, atrial cardiac veins. Their openings lie in a circle-like arrangement between the ostia of both caval veins and just above the tricuspid valve. In most cases there are variably sized intramural collecting chambers or sinuses just before the opening of all the cardiac veins. These sinu ...
... cardiac veins, atrial cardiac veins. Their openings lie in a circle-like arrangement between the ostia of both caval veins and just above the tricuspid valve. In most cases there are variably sized intramural collecting chambers or sinuses just before the opening of all the cardiac veins. These sinu ...
Implantable Cardioverter-Defibrillator
... • The (R) indicates that the pulse generator is rate-responsive during exercise. • The response by the pacemaker is to either trigger or inhibit a pacing stimulus, depending on the absence or presence, respectively, of atrial or ventricular conduction, separately or in combination, relative to the r ...
... • The (R) indicates that the pulse generator is rate-responsive during exercise. • The response by the pacemaker is to either trigger or inhibit a pacing stimulus, depending on the absence or presence, respectively, of atrial or ventricular conduction, separately or in combination, relative to the r ...
Standards for Provision of Echocardiography
... used should always be identified. Visual estimation should be reserved for cases in which quantitative assessment is not technically feasible. ...
... used should always be identified. Visual estimation should be reserved for cases in which quantitative assessment is not technically feasible. ...
The Heart and Cardiac Output
... increases cardiac output by a similar 15-35%. Note: as we age, atrial kick tends to be a more significant contributor to cardiac output (closer to 35%). This is one reason that our older patients are more affected by rhythm disturbances such as atrial fibrillation (a quivering of the atria rather th ...
... increases cardiac output by a similar 15-35%. Note: as we age, atrial kick tends to be a more significant contributor to cardiac output (closer to 35%). This is one reason that our older patients are more affected by rhythm disturbances such as atrial fibrillation (a quivering of the atria rather th ...
Print - Circulation Research
... oppose the shortening of muscle fibers, is as important a determinant of myocardial performance in the intact heart (1-3) as it is in the papillary muscle preparation (4). Many investigators are searching for an "index" of contractile state that will be independent of all external forces, but until ...
... oppose the shortening of muscle fibers, is as important a determinant of myocardial performance in the intact heart (1-3) as it is in the papillary muscle preparation (4). Many investigators are searching for an "index" of contractile state that will be independent of all external forces, but until ...
Print - Circulation
... Blood Institute. There were 51 men and 10 women in the study, ranging in age from 19 to 72 years (mean, 43 years). Fifty-one patients underwent operation because of moderate to severe cardiac symptoms (New York Heart Association functional Class III or IV). The other 10 patients were either asymptom ...
... Blood Institute. There were 51 men and 10 women in the study, ranging in age from 19 to 72 years (mean, 43 years). Fifty-one patients underwent operation because of moderate to severe cardiac symptoms (New York Heart Association functional Class III or IV). The other 10 patients were either asymptom ...
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.