The Right Ventricular Outflow Tract: The Road to Septal Pacing
... artery. With the shaped stylet, the lead almost always enters the left pulmonary artery. The lead is again fully loaded with the stylet and the lead retracted slowly. With experience, the movement of the tip through the pulmonary valve and in particular over the supraventricular crest and septomargi ...
... artery. With the shaped stylet, the lead almost always enters the left pulmonary artery. The lead is again fully loaded with the stylet and the lead retracted slowly. With experience, the movement of the tip through the pulmonary valve and in particular over the supraventricular crest and septomargi ...
EXPERIMENTS ON THE CAUSATION AND AMELIORATION
... interesting because all the conditions apparently favored the production of pulmonary edema: pressure in the pulmonary veins was surely raised because the dilatation of the left auricle shows that it received more blood than it could handle, so that back pressure resulted; the pressure in the pulmon ...
... interesting because all the conditions apparently favored the production of pulmonary edema: pressure in the pulmonary veins was surely raised because the dilatation of the left auricle shows that it received more blood than it could handle, so that back pressure resulted; the pressure in the pulmon ...
Biventricular Pacing in Patients with Bradycardia and Normal
... ventricular apical pacing.10 This finding was corroborated in a study of acute hemodynamic responses in patients with a normal QRS complex and a left ventricular ejection fraction of more than 40%, which showed that biventricular pacing, but not right ventricular apical pacing, preserved left ventri ...
... ventricular apical pacing.10 This finding was corroborated in a study of acute hemodynamic responses in patients with a normal QRS complex and a left ventricular ejection fraction of more than 40%, which showed that biventricular pacing, but not right ventricular apical pacing, preserved left ventri ...
PowerPoint - Cardiovascular Radiology
... • Great vessels - pulmonary artery enlarged • Cardiac silhouette – apex shifted R, RV & RAu enlargement, VHS 8.25 • No signs of Congestive Heart Failure ...
... • Great vessels - pulmonary artery enlarged • Cardiac silhouette – apex shifted R, RV & RAu enlargement, VHS 8.25 • No signs of Congestive Heart Failure ...
morphological study of coronary sinus in human cadaveric
... long and lies in the posterior part of the atrioventricular groove. The coronary sinus opens into the right atrium between the opening of IVC and the right atrioventricular orifice. The opening is guarded by an endocardial foldThebesian valve. The tributaries of coronary sinus are – great, small and ...
... long and lies in the posterior part of the atrioventricular groove. The coronary sinus opens into the right atrium between the opening of IVC and the right atrioventricular orifice. The opening is guarded by an endocardial foldThebesian valve. The tributaries of coronary sinus are – great, small and ...
Cardiac Arrhythmias: Diagnosis and Management. The Tachycardias
... Classically, the ECG trace shows a sawtooth pattern in leads II and III, characterised by a regular atrial rhythm and, in the untreated patient, a 2:1 AV block with a ventricular rate around 150 bpm. There is no isoelectric line between the P waves, which appear inverted in II, III and aVF in 70% (t ...
... Classically, the ECG trace shows a sawtooth pattern in leads II and III, characterised by a regular atrial rhythm and, in the untreated patient, a 2:1 AV block with a ventricular rate around 150 bpm. There is no isoelectric line between the P waves, which appear inverted in II, III and aVF in 70% (t ...
special article
... cluding: (1) the Starling mechanism whereby increased diastolic volume (EDV) engenders an increased stroke volume (SV), (2) the upper hmits to ventricular filling pressure and volume, and (3) the normal range to the ventricular ejection fraction (SV/EDV). Further, ultrastructure helps to define the ...
... cluding: (1) the Starling mechanism whereby increased diastolic volume (EDV) engenders an increased stroke volume (SV), (2) the upper hmits to ventricular filling pressure and volume, and (3) the normal range to the ventricular ejection fraction (SV/EDV). Further, ultrastructure helps to define the ...
Milrinone decreases both pulmonary arterial and venous
... Before discussing the implications of our results, we should consider what Pcap, estimated by our occlusion method, represents. Partitioning of PVR into arterial and venous segments by estimated Pcap depends on the theoretical model adopted for interpretation of the pulmonary arterial pressure decay ...
... Before discussing the implications of our results, we should consider what Pcap, estimated by our occlusion method, represents. Partitioning of PVR into arterial and venous segments by estimated Pcap depends on the theoretical model adopted for interpretation of the pulmonary arterial pressure decay ...
BAJ Reddi and RHS Carpenter
... determine stroke volume, which is governed by how much blood enters the right atrium and is delivered in each cycle into the ventricle; rather, it prevents accumulation by guaranteeing that this volume is expelled. In the laboratory, we can manipulate this volume in different ways. We may alter the ...
... determine stroke volume, which is governed by how much blood enters the right atrium and is delivered in each cycle into the ventricle; rather, it prevents accumulation by guaranteeing that this volume is expelled. In the laboratory, we can manipulate this volume in different ways. We may alter the ...
the development of the pulmonary trunk and the pulmonary arteries
... Statistica 8.0 software (StatSoft Polska) was used for statistical analysis of the obtained data. We calculated mean values and standard deviations for each age group with respect to sex. The results obtained were analyzed by the one-way ANOVA test for unpaired data (age) and two-way ANOVA test for ...
... Statistica 8.0 software (StatSoft Polska) was used for statistical analysis of the obtained data. We calculated mean values and standard deviations for each age group with respect to sex. The results obtained were analyzed by the one-way ANOVA test for unpaired data (age) and two-way ANOVA test for ...
Practical diastology André Y Denault, Pierre Couture CITATION
... deceleration time, and a reduction of the E/A ratio. The PVF PW Doppler signal will show an increased S/D ratio. Tissue Doppler of the mitral annulus will demonstrate an Em/Am ratio < 1 while on color M-mode, propagation velocity (Vp) will be decreased. The delayed relaxation abnormality is the most ...
... deceleration time, and a reduction of the E/A ratio. The PVF PW Doppler signal will show an increased S/D ratio. Tissue Doppler of the mitral annulus will demonstrate an Em/Am ratio < 1 while on color M-mode, propagation velocity (Vp) will be decreased. The delayed relaxation abnormality is the most ...
Venous excess: a new approach to cardiovascular control and its
... determine stroke volume, which is governed by how much blood enters the right atrium and is delivered in each cycle into the ventricle; rather, it prevents accumulation by guaranteeing that this volume is expelled. In the laboratory, we can manipulate this volume in different ways. We may alter the ...
... determine stroke volume, which is governed by how much blood enters the right atrium and is delivered in each cycle into the ventricle; rather, it prevents accumulation by guaranteeing that this volume is expelled. In the laboratory, we can manipulate this volume in different ways. We may alter the ...
Targeted Neonatal Echocardiography in the Neonatal Intensive
... In this document, we make clear distinctions between initial echocardiographic studies in neonates with the suspicion of CHD and studies performed on infants without any clinical suspicion of CHD. If CHD has been excluded, subsequent studies in children with structurally normal hearts can focus on h ...
... In this document, we make clear distinctions between initial echocardiographic studies in neonates with the suspicion of CHD and studies performed on infants without any clinical suspicion of CHD. If CHD has been excluded, subsequent studies in children with structurally normal hearts can focus on h ...
Closure of atrial septal defect in the adult. Cardiac remodeling is an
... fibrillation could therefore be interpreted as a signal of permanent structural atrial abnormalities secondary to the mechanisms described above. However, one must also consider the possibility that atrial fibrillation starts or facilitates a process causing irreversible structural changes in the at ...
... fibrillation could therefore be interpreted as a signal of permanent structural atrial abnormalities secondary to the mechanisms described above. However, one must also consider the possibility that atrial fibrillation starts or facilitates a process causing irreversible structural changes in the at ...
A review of heart chamber segmentation for structural and functional
... In this section, we briefly describe the anatomy of the heart to help readers establish a better association between the outcomes of various functional analysis methods and the actual structure of the heart (see Fig. 1). Essentially, the heart provides the blood circulation system with indispensable ...
... In this section, we briefly describe the anatomy of the heart to help readers establish a better association between the outcomes of various functional analysis methods and the actual structure of the heart (see Fig. 1). Essentially, the heart provides the blood circulation system with indispensable ...
Comparison of Uhl`s anomaly, right ventricular outflow tract
... VT has shown that they do not appear to progress to ARVD/C but RVOT VT was reported as a localized form of ARVD/C in 50 per cent of cases investigated42. Table I shows differences in the clinical expressions of the RVOT VT and ARVD/C. These studies indicate that RVOT VT could be a different entity a ...
... VT has shown that they do not appear to progress to ARVD/C but RVOT VT was reported as a localized form of ARVD/C in 50 per cent of cases investigated42. Table I shows differences in the clinical expressions of the RVOT VT and ARVD/C. These studies indicate that RVOT VT could be a different entity a ...
Contractile properties of thermally acclimated trout heart
... atrioventricular node (Katz, 1992) and by rapid contraction kinetics of the atrial muscle. Although atrial contraction exerts significant regulatory function in ventricular contractility through the Frank–Starling mechanism, its role in ventricular ...
... atrioventricular node (Katz, 1992) and by rapid contraction kinetics of the atrial muscle. Although atrial contraction exerts significant regulatory function in ventricular contractility through the Frank–Starling mechanism, its role in ventricular ...
His Bundle Electrocardiography
... 7.49, P02 66 mm Hg, and PCOQ 33 mm Hg. Chest Xray demonstrated cardiomegaly, pulmonary venous congestion, and a small right pleural effusion. Initial ECG showed atrial fibrillation with an irregular ventricular response of 160/min and nonspecific ST-T wave changes. During the first 6i, hours followi ...
... 7.49, P02 66 mm Hg, and PCOQ 33 mm Hg. Chest Xray demonstrated cardiomegaly, pulmonary venous congestion, and a small right pleural effusion. Initial ECG showed atrial fibrillation with an irregular ventricular response of 160/min and nonspecific ST-T wave changes. During the first 6i, hours followi ...
Ventricular structure, function, and mechanics at high altitude
... Due to the unique arrangement of myofibers, cardiac form and function are intrinsically linked, as reflected in the cardiac mechanics (LV twist and rotation and ventricular strain) that underpin ventricular function. In response to altered physiological demand, ventricular mechanics acutely change ( ...
... Due to the unique arrangement of myofibers, cardiac form and function are intrinsically linked, as reflected in the cardiac mechanics (LV twist and rotation and ventricular strain) that underpin ventricular function. In response to altered physiological demand, ventricular mechanics acutely change ( ...
PATTERNS OF HUMAN MYOCARDIAL OXYGEN EXTRACTION
... atypical chest pain without evidence to suggest coronary insufficiency. Coronary insufficiency. Patients judged to have coronary insufficiency on the basis of classical angina pectoris, documented myocardial infarction, and positive Master's test were placed in this group. In several cases the coron ...
... atypical chest pain without evidence to suggest coronary insufficiency. Coronary insufficiency. Patients judged to have coronary insufficiency on the basis of classical angina pectoris, documented myocardial infarction, and positive Master's test were placed in this group. In several cases the coron ...
Developing a global fluid-structure interaction
... and hemodynamic variations, they have gained considerable attention in assessing the hemodynamic conditions associated with cardiovascular diseases. In recent clinical studies, it was established that regional pathologies of the aortic valve can alter the structural and hemodynamic function of the v ...
... and hemodynamic variations, they have gained considerable attention in assessing the hemodynamic conditions associated with cardiovascular diseases. In recent clinical studies, it was established that regional pathologies of the aortic valve can alter the structural and hemodynamic function of the v ...
Cardiology Flash Cards
... Atrial flutter is usually associated with mitral valve disease, pulmonary embolism, thoracic surgery, hypoxia, electrolyte disturbances and hypercalcaemia. Atrial flutter results in poor atrial pumping since some parts of the atria are relaxing while other parts are contracting. Cardiac output decre ...
... Atrial flutter is usually associated with mitral valve disease, pulmonary embolism, thoracic surgery, hypoxia, electrolyte disturbances and hypercalcaemia. Atrial flutter results in poor atrial pumping since some parts of the atria are relaxing while other parts are contracting. Cardiac output decre ...
... In the 1980s, clinicians reported what seemed to be a surprisingly high prevalence (approximately 30%) of a normal LV ejection fraction in patients with congestive heart failure (14–16). Recurrent pulmonary edema was reported in elderly patients with ischemic heart disease—despite a normal LV ejecti ...
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.