Right Ventricular Ejection Fraction Angiography
... Because the reduction in the values of left ventricular ejection fraction introduced by the root mean square technique is similar in magnitude to that resulting from smoothing the right ventricular time-activity curve, the ratio between left and right ventricular ejection fraction remains unaffected ...
... Because the reduction in the values of left ventricular ejection fraction introduced by the root mean square technique is similar in magnitude to that resulting from smoothing the right ventricular time-activity curve, the ratio between left and right ventricular ejection fraction remains unaffected ...
Anatomy of the Human Heart
... down the anterior (superior) surface of the heart runs the anterior interventricular sulcus ("a groove"). This sulcus separates the left and right ventricles. The groove continues around the apex as the posterior interventricular sulcus on the posterior (inferior) surface. Between these sulci, locat ...
... down the anterior (superior) surface of the heart runs the anterior interventricular sulcus ("a groove"). This sulcus separates the left and right ventricles. The groove continues around the apex as the posterior interventricular sulcus on the posterior (inferior) surface. Between these sulci, locat ...
An Improved Method for Echographic Detection of Left
... Group C - Left atrial enlargement. In group C, consisting of patients expected to have left atrial enlargement due to mitral valve lesions and/or myocardial failure, all 80 were found to have endsystolic left atrial dimensions at least 17% greater than the end-diastolic dimension of their aortic roo ...
... Group C - Left atrial enlargement. In group C, consisting of patients expected to have left atrial enlargement due to mitral valve lesions and/or myocardial failure, all 80 were found to have endsystolic left atrial dimensions at least 17% greater than the end-diastolic dimension of their aortic roo ...
Electrocardiogram Interpretation
... cardiologists in difficult or uncertain cases, but such consultation takes time to set up, and is disruptive for both physicians. For all these reasons, rural family physicians must have good ECG interpretation skills. There is little literature on the use of ECG’s in urban or rural family practice. ...
... cardiologists in difficult or uncertain cases, but such consultation takes time to set up, and is disruptive for both physicians. For all these reasons, rural family physicians must have good ECG interpretation skills. There is little literature on the use of ECG’s in urban or rural family practice. ...
Transposition of the Pulmonary Veins
... pulmonary to systemic flow, at a given oxygen consumption.* However, as various investigators have pointed out,8' 16 mixing at the atrial level may not be complete. The systemic arterial saturation is often slightly less than that of the pulmonary artery; this difference is attributed by the Mayo gr ...
... pulmonary to systemic flow, at a given oxygen consumption.* However, as various investigators have pointed out,8' 16 mixing at the atrial level may not be complete. The systemic arterial saturation is often slightly less than that of the pulmonary artery; this difference is attributed by the Mayo gr ...
Full Text
... was higher than that of the control group. Self-care maintenance, self-care management, and self-care confidence had interactive effects of both variables and group, indicating that self-care program effects had a significantly positive impact on the experimental group. Scores on the self-care maint ...
... was higher than that of the control group. Self-care maintenance, self-care management, and self-care confidence had interactive effects of both variables and group, indicating that self-care program effects had a significantly positive impact on the experimental group. Scores on the self-care maint ...
Contractile properties of thermally acclimated trout heart
... tasks in the pumping work of the vertebrate heart, which muscle tissue. Similar differences also existed between the are reflected in their contractile properties. Although atrial tissues of cold-acclimated (CA, 4 °C) and warm-acclimated contraction is assumed to have an important role in the (WA, 1 ...
... tasks in the pumping work of the vertebrate heart, which muscle tissue. Similar differences also existed between the are reflected in their contractile properties. Although atrial tissues of cold-acclimated (CA, 4 °C) and warm-acclimated contraction is assumed to have an important role in the (WA, 1 ...
Cardiac MR Imaging and MR Angiography for Assessment of Com
... Pulmonary artery hypoplasia is associated with unilateral or segmental hypoplasia of the lungs, and both abnormalities are well depicted with MR imaging. The size and morphologic structure of the lungs may be assessed directly from the MR images, which complement the MR angiograms (4). Postoperative ...
... Pulmonary artery hypoplasia is associated with unilateral or segmental hypoplasia of the lungs, and both abnormalities are well depicted with MR imaging. The size and morphologic structure of the lungs may be assessed directly from the MR images, which complement the MR angiograms (4). Postoperative ...
Passamani-2014-Temporal profile and mechanisms
... infarction (MI) causing sympathetic nervous system over activity [1], [2]. Although the enhanced sympathetic activity provides initially inotropic support to the heart, maintaining cardiac output and arterial pressure following MI, it is also associated with the pathogenesis of ventricular arrhythmi ...
... infarction (MI) causing sympathetic nervous system over activity [1], [2]. Although the enhanced sympathetic activity provides initially inotropic support to the heart, maintaining cardiac output and arterial pressure following MI, it is also associated with the pathogenesis of ventricular arrhythmi ...
Cardiac Malpositions
... arteries arising from the morphologic left ventricle. The conus anatomy in this situation is variable but is usually bilate.rally deficient. It should be noted that as used herein DORV differs from the broader use proposed by Lev,' i.e., aorta and pulmonary artery completely or almost completely ari ...
... arteries arising from the morphologic left ventricle. The conus anatomy in this situation is variable but is usually bilate.rally deficient. It should be noted that as used herein DORV differs from the broader use proposed by Lev,' i.e., aorta and pulmonary artery completely or almost completely ari ...
Targeting atrioventricular differences in ion channel properties for
... Atrial fibrillation (AF) is the most common sustained arrhythmia and enhances the risk of stroke and heart failure.1 Although nonpharmacological options such as ablation and surgery are increasingly used, anti-arrhythmic drugs constitute the main treatment option.1 However, their effectiveness has b ...
... Atrial fibrillation (AF) is the most common sustained arrhythmia and enhances the risk of stroke and heart failure.1 Although nonpharmacological options such as ablation and surgery are increasingly used, anti-arrhythmic drugs constitute the main treatment option.1 However, their effectiveness has b ...
D ifferential regulation of cardiac protein kinase C isozyme
... differentially during gradual development of pressure-overload-induced cardiac hypertrophy, banding of the ascending aorta was used as an experimental model of left ventricular hypertrophy. Methods: One, 7 and 30 days after sham operation or aortic banding in male Wistar rats, the PKC activity and t ...
... differentially during gradual development of pressure-overload-induced cardiac hypertrophy, banding of the ascending aorta was used as an experimental model of left ventricular hypertrophy. Methods: One, 7 and 30 days after sham operation or aortic banding in male Wistar rats, the PKC activity and t ...
Effect of 2,3,7,8-Tetrachlorodibenzo-p
... comparisons with post hoc comparisons made using the Holm-Sidak test. Twoway repeated measures ANOVA was used to compared ISO-related changes in heart rate. A p < 0.05 was considered statistically significant in all cases. ...
... comparisons with post hoc comparisons made using the Holm-Sidak test. Twoway repeated measures ANOVA was used to compared ISO-related changes in heart rate. A p < 0.05 was considered statistically significant in all cases. ...
What is hypertrophic cardiomyopathy (HCM)?
... HCM is a genetic disease affecting the heart muscle. The most consistent feature of HCM is excessive thickening of that portion of the heart muscle known as the left ventricle (heart muscle thickening hypertrophy; diseased heart muscle cardiomyopathy). In quantitative terms, hypertrophy is usual ...
... HCM is a genetic disease affecting the heart muscle. The most consistent feature of HCM is excessive thickening of that portion of the heart muscle known as the left ventricle (heart muscle thickening hypertrophy; diseased heart muscle cardiomyopathy). In quantitative terms, hypertrophy is usual ...
acc/aha/esc practice guidelines—executive
... the presence or absence of detectable heart disease or related symptoms. For example, the term “lone AF” has been variously defined. The prognosis in terms of thromboembolism and mortality is most benign when applied to young individuals (aged less than 60 years) without clinical or echocardiographi ...
... the presence or absence of detectable heart disease or related symptoms. For example, the term “lone AF” has been variously defined. The prognosis in terms of thromboembolism and mortality is most benign when applied to young individuals (aged less than 60 years) without clinical or echocardiographi ...
Robertson, Taylor, Final Thesis.
... (Anderson & Turner, 1963; Cripps & Williams, 1975). In addition, blood volume increases during pregnancy, but it increases even more during lactation, especially during the first half of lactation (Bond, 1958). It has been shown that an increase in blood volume induces cardiac hypertrophy (Rossi & C ...
... (Anderson & Turner, 1963; Cripps & Williams, 1975). In addition, blood volume increases during pregnancy, but it increases even more during lactation, especially during the first half of lactation (Bond, 1958). It has been shown that an increase in blood volume induces cardiac hypertrophy (Rossi & C ...
Layer-Specific Quantification of Myocardial Deformation by Strain
... segment elevation-acute coronary syndromes (NSTE-ACS) were prospectively included. Coronary occlusion was found in 28, significant stenosis in 21, and no stenosis in 28 patients. Echocardiography was performed 1 to 2 h before angiography. Layer-specific longitudinal and circumferential strains were as ...
... segment elevation-acute coronary syndromes (NSTE-ACS) were prospectively included. Coronary occlusion was found in 28, significant stenosis in 21, and no stenosis in 28 patients. Echocardiography was performed 1 to 2 h before angiography. Layer-specific longitudinal and circumferential strains were as ...
A Thotharam HIV related pulmonaryhypertension in
... ,which are a result of inability to increase cardiac output with exercise 30. Symptoms at rest are reported in advanced cases. As PH advances and right ventricular failure develops, exertional chest pain, exertional syncope and peripheral oedema may develop. In many circumstances, angina occurs due ...
... ,which are a result of inability to increase cardiac output with exercise 30. Symptoms at rest are reported in advanced cases. As PH advances and right ventricular failure develops, exertional chest pain, exertional syncope and peripheral oedema may develop. In many circumstances, angina occurs due ...
Brugada Syndrome - Circulation: Arrhythmia and Electrophysiology
... cardiac abnormalities.1,2 Patients are at risk for sudden cardiac death (SCD) due to ventricular fibrillation (VF). Since 1953, the ECG pattern similar to coved-type ST-segment elevation was reported as a normal variant in the healthy population or related to VF with structural abnormality,3–5 but a ...
... cardiac abnormalities.1,2 Patients are at risk for sudden cardiac death (SCD) due to ventricular fibrillation (VF). Since 1953, the ECG pattern similar to coved-type ST-segment elevation was reported as a normal variant in the healthy population or related to VF with structural abnormality,3–5 but a ...
cardiac - London Bridge Hospital
... including congenital heart disease. Leading consultant cardiologists and surgeons are available to treat atrial fibrillation and other arrhythmias, coronary and valvular heart disease and perform complex cardiac surgery. The latest treatments – in the most up-to-date Cardiac Catheter Laboratory comp ...
... including congenital heart disease. Leading consultant cardiologists and surgeons are available to treat atrial fibrillation and other arrhythmias, coronary and valvular heart disease and perform complex cardiac surgery. The latest treatments – in the most up-to-date Cardiac Catheter Laboratory comp ...
Spatial Vector Electrocardiography A Method for Calculating the
... To calculate the spatial QRS loop from conventional leads, exactly the same principles are used as in calculating the mean spatial vectors. First, the frontal plane characteristics of the loop are determined from the limb leads, and then the sagittal plane characteristics are determined from the pre ...
... To calculate the spatial QRS loop from conventional leads, exactly the same principles are used as in calculating the mean spatial vectors. First, the frontal plane characteristics of the loop are determined from the limb leads, and then the sagittal plane characteristics are determined from the pre ...
Second Heart Sound in Pulmonary Hypertension - Heart
... operation. The phonocardiographic characteristics of S2 are shown in Table II, and an example is given in Fig. 1. Mean pulmonary arterial pressure ranged from 20 to 95 mm.Hg at rest, and pulmonary vascular resistance ranged from 1 to 21 units at rest in the 22 patients in whom cardiac output had bee ...
... operation. The phonocardiographic characteristics of S2 are shown in Table II, and an example is given in Fig. 1. Mean pulmonary arterial pressure ranged from 20 to 95 mm.Hg at rest, and pulmonary vascular resistance ranged from 1 to 21 units at rest in the 22 patients in whom cardiac output had bee ...
2014 ACC/AHA Guideline on Perioperative Cardiovascular
... The recommendations in this CPG are the official policy of the ACC and AHA until they are superseded by a published addendum, focused update, or revised full-text CPG. The reader is encouraged to consult the full-text CPG (8) for additional guidance and details about perioperative cardiovascular eval ...
... The recommendations in this CPG are the official policy of the ACC and AHA until they are superseded by a published addendum, focused update, or revised full-text CPG. The reader is encouraged to consult the full-text CPG (8) for additional guidance and details about perioperative cardiovascular eval ...
Oral Anticoagulants in Atrial Fibrillation
... DOACs are new drugs and there is limited data on their long-term safety and effectiveness. Guidelines and reviews differ in their approach to DOACs. Some recommend DOACs in preference to warfarin while others consider either to be options. CADTH considers warfarin as first line. (Page 33) Pati ...
... DOACs are new drugs and there is limited data on their long-term safety and effectiveness. Guidelines and reviews differ in their approach to DOACs. Some recommend DOACs in preference to warfarin while others consider either to be options. CADTH considers warfarin as first line. (Page 33) Pati ...
Cardiac contractility modulation
.jpg?width=300)
Cardiac contractility modulation (CCM) is a treatment for patients with moderate to severe left ventricular systolic heart failure (NYHA class II–IV). The short- and long-term use of this therapy enhances both the strength of ventricular contraction and the heart’s pumping capacity. The CCM mechanism is based on stimulation of the cardiac muscle by non-excitatory electrical signals (NES). CCM treatment is delivered by a pacemaker-like device that applies the NES, adjusted to and synchronized with the electrical action in the cardiac cycle.In CCM therapy, electrical stimulation is applied to the cardiac muscle during the absolute refractory period. In this phase of the cardiac cycle, electrical signals cannot trigger new cardiac muscle contractions, hence this type of stimulation is known as a non-excitatory stimulation. However, the electrical CCM signals increase the influx of calcium ions into the cardiac muscle cells (cardiomyocytes). In contrast to other electrical stimulation treatments for heart failure, such as pacemaker therapy or implantable cardioverter defibrillators (ICD), CCM does not affect the cardiac rhythm directly. Rather, the aim is to enhance the heart’s natural contraction (the native cardiac contractility) sustainably over long periods of time. Furthermore, unlike most interventions that increase cardiac contractility, CCM is not associated with an unfavorable increase in oxygen demand by the heart (measured in terms of Myocardial Oxygen Consumption or MVO2). This may be explained by the beneficial effect CCM has in improving cardiac efficiency. A meta-analysis in 2014 and an overview of device-based treatment options in heart failure in 2013 concluded that CCM treatment is safe, that it is generally beneficial to patients and that CCM treatment increases the exercise tolerance (ET) and quality of life (QoL) of patients. Furthermore, preliminary long-term survival data shows that CCM is associated with lower long-term mortality in heart failure patients when compared with expected rates among similar patients not treated with CCM.