Hypertrophic cardiomyopathy with extreme increase in left
... did not reflect a uniformly poor prognosis over the period of follow-up, and two-thirds of the patients had only mild or no symptoms at the most recent evaluation. (J Am Coli Cardiol 1986;8:57-65) ...
... did not reflect a uniformly poor prognosis over the period of follow-up, and two-thirds of the patients had only mild or no symptoms at the most recent evaluation. (J Am Coli Cardiol 1986;8:57-65) ...
Preload
... understanding function Larger diastolic ventricular volume = More stretch on muscle fibers = greater contraction Frank-Starling mechanism ...
... understanding function Larger diastolic ventricular volume = More stretch on muscle fibers = greater contraction Frank-Starling mechanism ...
Assessment of the 12-Lead Electrocardiogram as€a
... Copies: This document is available on the World Wide Web sites of the American Heart Association (my.americanheart.org) and the American College of Cardiology (cardiosource.org). For copies of this document, please contact Elsevier Inc. Reprint Department, fax (212) 633-3820, e-mail reprints@elsevie ...
... Copies: This document is available on the World Wide Web sites of the American Heart Association (my.americanheart.org) and the American College of Cardiology (cardiosource.org). For copies of this document, please contact Elsevier Inc. Reprint Department, fax (212) 633-3820, e-mail reprints@elsevie ...
In Vivo Magnetic Resonance Spectroscopy
... Background Skeletal muscle metabolic abnormalities have been described in patients with heart failure that are independent of total limb perfusion, histochemical changes, and muscle mass. However, these skeletal muscle metabolic abnormalities may result from tissue hypoxia caused by maldistribution ...
... Background Skeletal muscle metabolic abnormalities have been described in patients with heart failure that are independent of total limb perfusion, histochemical changes, and muscle mass. However, these skeletal muscle metabolic abnormalities may result from tissue hypoxia caused by maldistribution ...
Staircase, rest contraetions, and potentiation in the isolated rat heart
... the foregoing frequency. We also demonstrated (Fig. 5) that the duration of increased stimulation rate before the rest period has no ap precia ble influence on the course of contractions coming thereafter. Thus the last cycle leng th preceding the rest period has, rela tively, the greatest influence ...
... the foregoing frequency. We also demonstrated (Fig. 5) that the duration of increased stimulation rate before the rest period has no ap precia ble influence on the course of contractions coming thereafter. Thus the last cycle leng th preceding the rest period has, rela tively, the greatest influence ...
Tinman/Nkx2-5 acts via miR-1 and upstream of Cdc42 to regulate
... Tinman and its mammalian homologue Nkx2-5 are homeobox transcription factors that play crucial roles in heart develop ment and function (Prall et al., 2002). Whereas ablation of tinman in the Drosophila embryo abolishes heart formation, targeted deletion of tinman at later stages reveals additional ...
... Tinman and its mammalian homologue Nkx2-5 are homeobox transcription factors that play crucial roles in heart develop ment and function (Prall et al., 2002). Whereas ablation of tinman in the Drosophila embryo abolishes heart formation, targeted deletion of tinman at later stages reveals additional ...
Vascular corrosion casting of human heart
... filling of the vessels using latex resin, filling of the vessels with a polymerizing substance (vinylite, acrylic etc) with subsequent corrosion of the organ tissue using acidic solutions and angiographies.4 Tsikaras et al. believe that acrylic resins together with corrosion techniques are ideal for ...
... filling of the vessels using latex resin, filling of the vessels with a polymerizing substance (vinylite, acrylic etc) with subsequent corrosion of the organ tissue using acidic solutions and angiographies.4 Tsikaras et al. believe that acrylic resins together with corrosion techniques are ideal for ...
Triage strategy for urgent management of cardiac
... If the pericardial effusion cannot be reached by a needle or a catheter, surgical drainage is required, usually through a subcostal incision. Furthermore, surgical drainage is desirable in patients with purulent pericardial fluid, intrapericardial bleeding, and in those with clotted hemopericardium ...
... If the pericardial effusion cannot be reached by a needle or a catheter, surgical drainage is required, usually through a subcostal incision. Furthermore, surgical drainage is desirable in patients with purulent pericardial fluid, intrapericardial bleeding, and in those with clotted hemopericardium ...
LQTS mutation N1325S in cardiac sodium channel gene SCN5A
... Objective: Mutations in the cardiac sodium channel gene SCN5A cause long QT syndrome (LQTS). We previously generated an LQTS mouse model (TG-NS) that overexpresses the LQTS mutation N1325S in SCN5A. The TG-NS mice manifested the clinical features of LQTS including spontaneous VT, syncope and sudden ...
... Objective: Mutations in the cardiac sodium channel gene SCN5A cause long QT syndrome (LQTS). We previously generated an LQTS mouse model (TG-NS) that overexpresses the LQTS mutation N1325S in SCN5A. The TG-NS mice manifested the clinical features of LQTS including spontaneous VT, syncope and sudden ...
Triage strategy for urgent management of cardiac tamponade: a
... for pericardiocentesis Pericardiocentesis was performed for decades as a ‘blind’ procedure, almost exclusively from the subxiphoid area, which remained the most frequently used method. Currently however, echocardiography is widely available and except in very rare urgent cases with clear diagnosis ( ...
... for pericardiocentesis Pericardiocentesis was performed for decades as a ‘blind’ procedure, almost exclusively from the subxiphoid area, which remained the most frequently used method. Currently however, echocardiography is widely available and except in very rare urgent cases with clear diagnosis ( ...
5 Precordial Pulsations
... of which are conduits of fluid (blood). Therefore, pure physical principles of hydrodynamics should be sufficient to explain the mechanism of the apical impulse formation with one important anatomical consideration, which is the fact that the aorta is essentially a coiled pipe (aortic arch) and fixe ...
... of which are conduits of fluid (blood). Therefore, pure physical principles of hydrodynamics should be sufficient to explain the mechanism of the apical impulse formation with one important anatomical consideration, which is the fact that the aorta is essentially a coiled pipe (aortic arch) and fixe ...
T1 Mapping for Myocardial Fibrosis by Cardiac Magnetic
... T 1 relaxation time refers to the tissue-specific time constant and is a measure of the time taken for protons to realign with the static field after perturbation by the RF pulse. This realignment with B0 is termed T 1 longitudinal relaxation and the time in milliseconds. The above diagram T 1 recov ...
... T 1 relaxation time refers to the tissue-specific time constant and is a measure of the time taken for protons to realign with the static field after perturbation by the RF pulse. This realignment with B0 is termed T 1 longitudinal relaxation and the time in milliseconds. The above diagram T 1 recov ...
PDF-link: 199904020112
... Discussion The shape and the location of the strength-duration curve for cardiac pacing have been mostly determined during invasive electrophysiologic studies and pacemaker implantation procedures. It is known that the strength-duration curve [21-24] may be shifted upward and to the right in pacing ...
... Discussion The shape and the location of the strength-duration curve for cardiac pacing have been mostly determined during invasive electrophysiologic studies and pacemaker implantation procedures. It is known that the strength-duration curve [21-24] may be shifted upward and to the right in pacing ...
TGA LATE RESULT M. Turina
... • Lower operative mortality and smoother postoperative course • Technically less demanding • Left ventricle in systemic circulation ...
... • Lower operative mortality and smoother postoperative course • Technically less demanding • Left ventricle in systemic circulation ...
Measurement of cardiac output during exercise in patients with
... of prognosis. The direct Fick (dFick) method is considered as the gold standard for the measurement of cardiac output, but is highly invasive and therefore difficult to use routinely in clinical settings. Recently two new devices have been developed, which are less-invasive and have the potential to ...
... of prognosis. The direct Fick (dFick) method is considered as the gold standard for the measurement of cardiac output, but is highly invasive and therefore difficult to use routinely in clinical settings. Recently two new devices have been developed, which are less-invasive and have the potential to ...
20 Pregnancy and Heart Disease Patrizia Presbitero, Giacomo G. Boccuzzi, Christianne J.M.
... Blood volume and cardiac output The most remarkable change related to pregnancy is the increase in blood volume, which almost doubles by the end of pregnancy. It starts to increase from the sixth week, rising rapidly in the second trimester and becoming stable in the last 8 weeks [4]. Red cell mass ...
... Blood volume and cardiac output The most remarkable change related to pregnancy is the increase in blood volume, which almost doubles by the end of pregnancy. It starts to increase from the sixth week, rising rapidly in the second trimester and becoming stable in the last 8 weeks [4]. Red cell mass ...
clinical usefulness of b-type natriuretic peptide - Heart
... from an Asian population showed that when screening for this purpose, BNP had an overall accuracy of 0.97. The negative predictive value was 99% and the positive predictive value was 44%. Using this broader concept of cardiac abnormalities, BNP screening appears to have a more pertinent role than wh ...
... from an Asian population showed that when screening for this purpose, BNP had an overall accuracy of 0.97. The negative predictive value was 99% and the positive predictive value was 44%. Using this broader concept of cardiac abnormalities, BNP screening appears to have a more pertinent role than wh ...
Tissue doppler echocardiography for evaluating left ventricular
... Also obese adolescents are more likely to have hypertension in adulthood (8.5 fold compared to normal weighted).10 Tissue Doppler Echocardiography (TDE) is a modified form of conventional pulse Doppler echocardiograpy that is used for researching negative effects of obesity on the heart and it provi ...
... Also obese adolescents are more likely to have hypertension in adulthood (8.5 fold compared to normal weighted).10 Tissue Doppler Echocardiography (TDE) is a modified form of conventional pulse Doppler echocardiograpy that is used for researching negative effects of obesity on the heart and it provi ...
Effect of changes in contractility on the index of myocardial
... end systolic frames from the echocardiogram of 10 previously studied dogs. Each frame was analyzed 3 weeks apart by 2 observers (see acknowledgement). The average difference for end diastolic or end systolic volume was 2.2 ± 0.9 cc for intraobserver variability and 3.4 ± 1.7 cc for ...
... end systolic frames from the echocardiogram of 10 previously studied dogs. Each frame was analyzed 3 weeks apart by 2 observers (see acknowledgement). The average difference for end diastolic or end systolic volume was 2.2 ± 0.9 cc for intraobserver variability and 3.4 ± 1.7 cc for ...
Patient Selection for subcutaneous ICD
... A proposal for an application requesting Medicare Benefits Schedule (MBS) listing for the insertion of a subcutaneous implantable cardioverter defibrillator (ICD) electrode1 was received from Boston Scientific by the Department of Health and Ageing in September 2013. Conventional (transvenous) ICD t ...
... A proposal for an application requesting Medicare Benefits Schedule (MBS) listing for the insertion of a subcutaneous implantable cardioverter defibrillator (ICD) electrode1 was received from Boston Scientific by the Department of Health and Ageing in September 2013. Conventional (transvenous) ICD t ...
Conus arteriosus: an anatomic and terminologic evaluation
... and “infundibulum” are used synonymously to define the cone-shaped, smooth-surfaced area near the opening of the pulmonary trunk (pulmonary orifice) (Figure 2). The conus branch of the right coronary artery (ramus coni arteriosi) and the conus branch of the anterior interventricular branch of the le ...
... and “infundibulum” are used synonymously to define the cone-shaped, smooth-surfaced area near the opening of the pulmonary trunk (pulmonary orifice) (Figure 2). The conus branch of the right coronary artery (ramus coni arteriosi) and the conus branch of the anterior interventricular branch of the le ...
The index of suspicion of RV infarction should be particularly high in
... Presence of a significant A wave on pulmonary arterial Doppler throughout the respiratory cycle [17] ...
... Presence of a significant A wave on pulmonary arterial Doppler throughout the respiratory cycle [17] ...
Electrocardiography
Electrocardiography (ECG or EKG*) is the process of recording the electrical activity of the heart over a period of time using electrodes placed on a patient's body. These electrodes detect the tiny electrical changes on the skin that arise from the heart muscle depolarizing during each heartbeat.In a conventional 12 lead ECG, ten electrodes are placed on the patient's limbs and on the surface of the chest. The overall magnitude of the heart's electrical potential is then measured from twelve different angles (""leads"") and is recorded over a period of time (usually 10 seconds). In this way, the overall magnitude and direction of the heart's electrical depolarization is captured at each moment throughout the cardiac cycle. The graph of voltage versus time produced by this noninvasive medical procedure is referred to as an electrocardiogram (abbreviated ECG or EKG).During each heartbeat, a healthy heart will have an orderly progression of depolarization that starts with pacemaker cells in the sinoatrial node, spreads out through the atrium, passes through the atrioventricular node down into the bundle of His and into the Purkinje fibers spreading down and to the left throughout the ventricles. This orderly pattern of depolarization gives rise to the characteristic ECG tracing. To the trained clinician, an ECG conveys a large amount of information about the structure of the heart and the function of its electrical conduction system. Among other things, an ECG can be used to measure the rate and rhythm of heartbeats, the size and position of the heart chambers, the presence of any damage to the heart's muscle cells or conduction system, the effects of cardiac drugs, and the function of implanted pacemakers.