Surgical Ablation of Atrial Fibrillation during Mitral
... trial fibrillation, which is associated with reduced survival and increased risk of stroke, is present in 30 to 50% of patients presenting for mitral-valve surgery.1,2 The development of open surgical procedures for the ablation of atrial fibrillation has led to their widespread application during c ...
... trial fibrillation, which is associated with reduced survival and increased risk of stroke, is present in 30 to 50% of patients presenting for mitral-valve surgery.1,2 The development of open surgical procedures for the ablation of atrial fibrillation has led to their widespread application during c ...
PULMONARY AIR EMBOLISM
... still remain many problems to be solved as to the pathophysiology of this postperfusion problem. The above complications were the most deteriorating factors especially when the heart disease accompanied by increased pulmonary vascular resistance was surgically treated. Clinical manifestation of the ...
... still remain many problems to be solved as to the pathophysiology of this postperfusion problem. The above complications were the most deteriorating factors especially when the heart disease accompanied by increased pulmonary vascular resistance was surgically treated. Clinical manifestation of the ...
Perioperative Management of Pulmonary Hypertension
... but ECG changes alone cannot determine disease severity or prognosis [Ahearn et al, 2002; Bossone et al, 2002]. The chest radiograph may show evidence of right ventricular hypertrophy (decreased retrosternal space) or prominent pulmonary vasculature. Among the myriad of available tests, echocardiogr ...
... but ECG changes alone cannot determine disease severity or prognosis [Ahearn et al, 2002; Bossone et al, 2002]. The chest radiograph may show evidence of right ventricular hypertrophy (decreased retrosternal space) or prominent pulmonary vasculature. Among the myriad of available tests, echocardiogr ...
Transposition of the Pulmonary Veins
... veins is a serious anomaly, profoundly altering the normal circulatory pattern. In this anomaly, the right atrium receives the entire systemic and pulmonary venous return, and supplies the left heart through a patent foramen ovale or an atrial septal defect. As in other types of congenital heart dis ...
... veins is a serious anomaly, profoundly altering the normal circulatory pattern. In this anomaly, the right atrium receives the entire systemic and pulmonary venous return, and supplies the left heart through a patent foramen ovale or an atrial septal defect. As in other types of congenital heart dis ...
ACLS Rhythms for the ACLS Algorithms
... ■ Palpitations felt by patient at the paroxysmal onset; becomes anxious, uncomfortable ■ Exercise tolerance low with very high rates ■ Symptoms of unstable tachycardia may occur ...
... ■ Palpitations felt by patient at the paroxysmal onset; becomes anxious, uncomfortable ■ Exercise tolerance low with very high rates ■ Symptoms of unstable tachycardia may occur ...
Limitations and difficulties of echocardiographic short
... force of apposition of the stent frame to the adjacent tissue [13]. Thus, less PVL is seen at the outside curvature of the aorta because of higher apposition force, that may even be increased by a transfemoral route that may push the device toward the outside curvature of the aorta. In Fig. 4, the P ...
... force of apposition of the stent frame to the adjacent tissue [13]. Thus, less PVL is seen at the outside curvature of the aorta because of higher apposition force, that may even be increased by a transfemoral route that may push the device toward the outside curvature of the aorta. In Fig. 4, the P ...
Heart Surgery Patient Guide - Stony Brook Heart Institute
... • The left side of the heart pumps blood to the entire body, so it has to work a lot harder than the right side. And because the mitral and aortic valves are on the heart’s left side, it’s usually these valves that have problems. YOUR CONDITION The two most common heart valve conditions are: • Narro ...
... • The left side of the heart pumps blood to the entire body, so it has to work a lot harder than the right side. And because the mitral and aortic valves are on the heart’s left side, it’s usually these valves that have problems. YOUR CONDITION The two most common heart valve conditions are: • Narro ...
Pulmonary Hypertension in the Critically Ill
... equation is applied to calculate the RV-RA gradient, with subsequent addition of the RAP to calculate the SPAP. If an adequate TR jet is obtained the correlation with RHC-obtained SPAP measurements is very good (Janda et al., 2011). An experienced operator will take time to optimize the Doppler sign ...
... equation is applied to calculate the RV-RA gradient, with subsequent addition of the RAP to calculate the SPAP. If an adequate TR jet is obtained the correlation with RHC-obtained SPAP measurements is very good (Janda et al., 2011). An experienced operator will take time to optimize the Doppler sign ...
Pulmonary vascular responses to exercise: a haemodynamic observation EDITORIAL
... resting variables and is a standard of care in the assessment of coronary artery disease with less subsequent cardiovascular events. In pulmonary hypertension (PH), right ventricular function is clearly an important determinant of survival. However, right ventricular impairment is currently assessed ...
... resting variables and is a standard of care in the assessment of coronary artery disease with less subsequent cardiovascular events. In pulmonary hypertension (PH), right ventricular function is clearly an important determinant of survival. However, right ventricular impairment is currently assessed ...
Cardiac Arrhythmias
... • Most common arrhythmia; risk increases with age. • Irregular fibrillating atrial waves at a rate of 300-600 bpm, best seen in leads II, III, aVF &V1. • Absence of P waves • Fibrillation is may caused by numerous microentry circuits ...
... • Most common arrhythmia; risk increases with age. • Irregular fibrillating atrial waves at a rate of 300-600 bpm, best seen in leads II, III, aVF &V1. • Absence of P waves • Fibrillation is may caused by numerous microentry circuits ...
PDF
... can occur, depending on the severity of the obstruction. Clinical outcome varies from mild systemic hypertension to serious heart failure and death. the clinical manifestations are variable and so is the age of diagnosis. A rapid progression with heart failure can be seen in the neonate, but sometim ...
... can occur, depending on the severity of the obstruction. Clinical outcome varies from mild systemic hypertension to serious heart failure and death. the clinical manifestations are variable and so is the age of diagnosis. A rapid progression with heart failure can be seen in the neonate, but sometim ...
The Influence of Cardiac Trabeculae on Ventricular
... trabecular muscular tissue is homologous with the bulk myocardium, is one of the main reasons why the trabeculae are much favoured by experimentalists for the study of the ionic, mechanical, and metabolic function of the heart muscle. Despite this wide use of ventricular trabeculae as experimental m ...
... trabecular muscular tissue is homologous with the bulk myocardium, is one of the main reasons why the trabeculae are much favoured by experimentalists for the study of the ionic, mechanical, and metabolic function of the heart muscle. Despite this wide use of ventricular trabeculae as experimental m ...
Cardiac diastolic function and hypercapnic ventilatory responses in central sleep apnoea
... the hallmark feature of both types of CSA, has previously been attributed to either increased pulmonary vagal afferent-nerve activity due to pulmonary hypertension [9, 11–14] or increased ventilatory responses to CO2 [5–8]. Subjects with CHF-CSA are thought to have both mechanisms operating [6–8, 14 ...
... the hallmark feature of both types of CSA, has previously been attributed to either increased pulmonary vagal afferent-nerve activity due to pulmonary hypertension [9, 11–14] or increased ventilatory responses to CO2 [5–8]. Subjects with CHF-CSA are thought to have both mechanisms operating [6–8, 14 ...
PDF - Circulation
... pulmonary arterial pressure drops, while systemic arterial pressure increases further.18 When a congenital heart lesion exists in which there is equalization of systemic and pulmonary pressures, the hemodynamic disturbance and clinical features are largely dependent on the relationship between syste ...
... pulmonary arterial pressure drops, while systemic arterial pressure increases further.18 When a congenital heart lesion exists in which there is equalization of systemic and pulmonary pressures, the hemodynamic disturbance and clinical features are largely dependent on the relationship between syste ...
Demystifying the Pediatric Cardiomyopathies
... diagnosed much more likely will be a metabolic or inherited disorder[1]. This poses the conundrum of pediatric cardiomyopathy – a relatively uncommon condition, which has a large number of potential causes that are rare, have important genetic implications and require intensive and expensive investi ...
... diagnosed much more likely will be a metabolic or inherited disorder[1]. This poses the conundrum of pediatric cardiomyopathy – a relatively uncommon condition, which has a large number of potential causes that are rare, have important genetic implications and require intensive and expensive investi ...
PDF - Oxford Academic
... force may appear as potentiation of the response to excitation, as increased inotropism in spontaneous contractions, or as an increase in tonus. We have directed our attention to the alterations of force induced in aplysiid ventricles by applied postulated neurohumors. The results are interpreted in ...
... force may appear as potentiation of the response to excitation, as increased inotropism in spontaneous contractions, or as an increase in tonus. We have directed our attention to the alterations of force induced in aplysiid ventricles by applied postulated neurohumors. The results are interpreted in ...
Willem J. Kolff audio-visual collection, 1949-1995
... 1958. Films document the effect of thrombosis on different valve material and high speed photography is used to explore the strengths of different valves, in testing machines. The development of the Norton, or Solenoid, heart is shown in films documenting the insertion of this heart and the recovery ...
... 1958. Films document the effect of thrombosis on different valve material and high speed photography is used to explore the strengths of different valves, in testing machines. The development of the Norton, or Solenoid, heart is shown in films documenting the insertion of this heart and the recovery ...
Automatic Optimum Phase Selection In Cardiac CT Imaging Master
... into the aorta. • Pulmonary valve: It separates the right ventricle from the pulmonary artery. As the ventricles contract, it opens to allow the de-oxygenated blood collected in the right ventricle to flow to the lungs. It closes as the ventricles relax, preventing blood from returning to the heart. ...
... into the aorta. • Pulmonary valve: It separates the right ventricle from the pulmonary artery. As the ventricles contract, it opens to allow the de-oxygenated blood collected in the right ventricle to flow to the lungs. It closes as the ventricles relax, preventing blood from returning to the heart. ...
table of contents
... More commonly, aortic valve stenosis is relatively mild in early life, and the baby may appear to be completely healthy, the only symptom being a mild heart murmur. Many times, the child with mild aortic stenosis does not require immediate treatment. Periodic visits to the cardiologist may provide t ...
... More commonly, aortic valve stenosis is relatively mild in early life, and the baby may appear to be completely healthy, the only symptom being a mild heart murmur. Many times, the child with mild aortic stenosis does not require immediate treatment. Periodic visits to the cardiologist may provide t ...
Effect of Acutely Increased Right Ventricular Afterload on Work
... Left ventricular stroke work, the energy output from the left ventricular chamber during contraction, has recently been shown to be a linear function of the end-diastolic volume in conscious dogs.32 If the effects of altered right ventricular loading conditions on left ventricular systolic function ...
... Left ventricular stroke work, the energy output from the left ventricular chamber during contraction, has recently been shown to be a linear function of the end-diastolic volume in conscious dogs.32 If the effects of altered right ventricular loading conditions on left ventricular systolic function ...
toward consistent definitions for preload and afterload
... “. . . during diastole a greater influx of blood into the ventricle will cause the ensuing contraction to be more forceful. This may be thought of as a ‘preload’ stimulus since it was applied before contraction began.” (p. 76) “. . . he [Starling] controlled the right atrial pressure (and thereby th ...
... “. . . during diastole a greater influx of blood into the ventricle will cause the ensuing contraction to be more forceful. This may be thought of as a ‘preload’ stimulus since it was applied before contraction began.” (p. 76) “. . . he [Starling] controlled the right atrial pressure (and thereby th ...
Left Septal Atrial Tachycardias: Electrocardiographic
... The anatomic location of focal ATs is determined by a complex interplay between atrial anatomy and electrophysiology. The interatrial septum is a relatively limited structure composed of the floor of the fossa, the antero-inferior rim of the fossa abutting the tricuspid valve vestibule and the flap ...
... The anatomic location of focal ATs is determined by a complex interplay between atrial anatomy and electrophysiology. The interatrial septum is a relatively limited structure composed of the floor of the fossa, the antero-inferior rim of the fossa abutting the tricuspid valve vestibule and the flap ...
DETERMINANTS OF CARDIAC FUNCTION: SIMULATION OF A
... opens, and the ejection phase begins (point C to D). At point D, ventricular contraction ceases and ventricular pressure falls below aortic pressure. At that time, the aortic valve closes, and the isovolumetric relaxation phase begins (point D to A). Ideally, the line from D to A should be perfectly ...
... opens, and the ejection phase begins (point C to D). At point D, ventricular contraction ceases and ventricular pressure falls below aortic pressure. At that time, the aortic valve closes, and the isovolumetric relaxation phase begins (point D to A). Ideally, the line from D to A should be perfectly ...
Surgical Ventricular Reconstruction for Ischemic or Idiopathic
... Myocardial infarction is defined as regional necrosis of cardiac tissue due to acute ischemia. Shortly after myocyte necrosis, edema and inflammation occur in the infarcted area. Eventually, a scar develops and is characterized by fibroblast proliferation and collagen deposition. Before definite sca ...
... Myocardial infarction is defined as regional necrosis of cardiac tissue due to acute ischemia. Shortly after myocyte necrosis, edema and inflammation occur in the infarcted area. Eventually, a scar develops and is characterized by fibroblast proliferation and collagen deposition. Before definite sca ...
Structural study of pulmonary circulation and of heart in total
... In the present study quantitative morphometric techniques have been applied to the injected and inflated lung in order to determine whether the pulmonary vessels are structurally normal at birth, and to assess the effect of pulmonary venous obstruction on the early days of postnatal growth. The size ...
... In the present study quantitative morphometric techniques have been applied to the injected and inflated lung in order to determine whether the pulmonary vessels are structurally normal at birth, and to assess the effect of pulmonary venous obstruction on the early days of postnatal growth. The size ...
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.