Experimental Demonstration of Concealed AV
... formation in, and conduction from, the junctional pacemaker."4 Furthermore, a wellknown manifestation of concealed retrograde conduction was observed during artificial ventricular pacing in patients who have preserved or resumed AV conduction of sinus impulses. If, under such circumstances, the arti ...
... formation in, and conduction from, the junctional pacemaker."4 Furthermore, a wellknown manifestation of concealed retrograde conduction was observed during artificial ventricular pacing in patients who have preserved or resumed AV conduction of sinus impulses. If, under such circumstances, the arti ...
Evaluation of Syncope
... episodes during their lives.1 More than 75 percent of persons older than 70 years will experience syncope at least once, 20 percent will have two episodes, and a small subset will have three or more episodes.2-5 The defining characteristics of syncope include rapid onset with transient loss of consc ...
... episodes during their lives.1 More than 75 percent of persons older than 70 years will experience syncope at least once, 20 percent will have two episodes, and a small subset will have three or more episodes.2-5 The defining characteristics of syncope include rapid onset with transient loss of consc ...
acute rheumatic fever: current scenario in india
... criterion, ECHO evidence of carditis / valvulitis was seen in 46.9% of cases and the pediatricians had overlooked the carditis leading to under diagnosis of carditis in patients with arthralgia. This shows that in regions where ARF is endemic if arthralgia is taken as minor criteria and ECHO is not ...
... criterion, ECHO evidence of carditis / valvulitis was seen in 46.9% of cases and the pediatricians had overlooked the carditis leading to under diagnosis of carditis in patients with arthralgia. This shows that in regions where ARF is endemic if arthralgia is taken as minor criteria and ECHO is not ...
Coronary structure and perfusion in health and disease
... cause of mortality worldwide despite the fact that currently available strategies to lower individual risk factors and treat evident coronary artery stenoses have reduced the cardiovascular event rate by 20–30%. Therefore, developing improved modalities for the diagnosis and the treatment of coronar ...
... cause of mortality worldwide despite the fact that currently available strategies to lower individual risk factors and treat evident coronary artery stenoses have reduced the cardiovascular event rate by 20–30%. Therefore, developing improved modalities for the diagnosis and the treatment of coronar ...
Congenital Aneurysm of the Sinus of Valsalva
... • Aneurysms usually arise from the right coronary sinus and extend into the right ventricle or right atrium. • Aneurysmal rupture into the right heart results in a large left-to-right shunt , which, in turn, can lead to congestive heart failure. • Unruptured aneurysms extending into the right heart ...
... • Aneurysms usually arise from the right coronary sinus and extend into the right ventricle or right atrium. • Aneurysmal rupture into the right heart results in a large left-to-right shunt , which, in turn, can lead to congestive heart failure. • Unruptured aneurysms extending into the right heart ...
the left atrium in hypertension: a symbol of mortality and morbidity?
... though left atrial enlargement was significantly greater among patients with LVH in the study by Tedesco et al [31], this group was significantly older compared to the group without LVH. As the authors admit, relationship between the left ventricular diastolic dysfunction and left atrial dimensions ...
... though left atrial enlargement was significantly greater among patients with LVH in the study by Tedesco et al [31], this group was significantly older compared to the group without LVH. As the authors admit, relationship between the left ventricular diastolic dysfunction and left atrial dimensions ...
PDF - Heart Rhythm Society
... common clinical scenarios where implantable cardioverterdefibrillators (ICDs) and cardiac resynchronization therapy (CRT), also known as biventricular pacing, are frequently considered. These implanted devices are also collectively referred to as cardiovascular implantable electronic devices (CIEDs) ...
... common clinical scenarios where implantable cardioverterdefibrillators (ICDs) and cardiac resynchronization therapy (CRT), also known as biventricular pacing, are frequently considered. These implanted devices are also collectively referred to as cardiovascular implantable electronic devices (CIEDs) ...
Department of Biomedical Engineering
... forces are applied. Translation and rotation can appear even though the distance remains and thus no deformations occur. The deformations in the cardiac wall are elastic, meaning that once the forces are no longer applied the body returns to its former reference state. Strain describes deformation a ...
... forces are applied. Translation and rotation can appear even though the distance remains and thus no deformations occur. The deformations in the cardiac wall are elastic, meaning that once the forces are no longer applied the body returns to its former reference state. Strain describes deformation a ...
Techniques for Ventricular Repolarization Instability Assessment
... shock to the heart in the presence of VT or VF and restore its sinus rhythm. Antiarrhythmic drugs, by acting on some of those factors, prevent the occurrence of arrhythmias, thus reducing the probability of SCD. The use of these therapies (or a combination of them) must be assessed in terms of safet ...
... shock to the heart in the presence of VT or VF and restore its sinus rhythm. Antiarrhythmic drugs, by acting on some of those factors, prevent the occurrence of arrhythmias, thus reducing the probability of SCD. The use of these therapies (or a combination of them) must be assessed in terms of safet ...
atrial septal defect with pulmonary hypertension - Heart
... Ostium primum defects were diagnosed in 3 instances, two with obstructive and one with hyperkinetic pulmonary hypertension; the latter proved to have a common A-V canal at operation. Wood (1958) found pulmonary hypertension in 43 per cent of 21 cases of common atrio-ventricular canal or ostium primu ...
... Ostium primum defects were diagnosed in 3 instances, two with obstructive and one with hyperkinetic pulmonary hypertension; the latter proved to have a common A-V canal at operation. Wood (1958) found pulmonary hypertension in 43 per cent of 21 cases of common atrio-ventricular canal or ostium primu ...
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 ...
Atrial natriuretic polypeptide is removed by the lungs and released
... subjects, 5 patients with mitral stenosis and 9 patients with atria1 septal defect). The plasma levels in the pulmonary artery, pulmonary capillary bed, pulmonary vein and left atrium were 277 f 240,222 + 195,232 t 195and 267 -C220 pg/ml, respectively. There was a significantdecrease of the: plasma ...
... subjects, 5 patients with mitral stenosis and 9 patients with atria1 septal defect). The plasma levels in the pulmonary artery, pulmonary capillary bed, pulmonary vein and left atrium were 277 f 240,222 + 195,232 t 195and 267 -C220 pg/ml, respectively. There was a significantdecrease of the: plasma ...
2012 ACCF/AHA/HRS Focused Update
... do not lend themselves to clinical trials. Although randomized trials are unavailable, there may be a very clear clinical consensus that a particular test or therapy is useful or effective. *Data available from clinical trials or registries about the usefulness/efficacy in different subpopulations, ...
... do not lend themselves to clinical trials. Although randomized trials are unavailable, there may be a very clear clinical consensus that a particular test or therapy is useful or effective. *Data available from clinical trials or registries about the usefulness/efficacy in different subpopulations, ...
Caffeine and Cardiac Arrhythmias: A Review of the Evidence
... magnitude of the release is 6-fold less elevated than the increase noted during exercise.51 Several human epidemiologic studies have been performed to probe the link between caffeine and arrhythmia, with mixed results. An epidemiologic survey of 7311 healthy men aged 37-57 years who underwent 2-minu ...
... magnitude of the release is 6-fold less elevated than the increase noted during exercise.51 Several human epidemiologic studies have been performed to probe the link between caffeine and arrhythmia, with mixed results. An epidemiologic survey of 7311 healthy men aged 37-57 years who underwent 2-minu ...
Unusual Branching Pattern of Left Coronary Artery
... occurs in more than 1% of otherwise normal individuals [3, 4]. The advances made in coronary arterial bypass surgeries and modern methods of myocardial revascularization makes sound and complete knowledge of the normal and variant anatomy of coronary artery [5] indispensable and imperative. Diagonal ...
... occurs in more than 1% of otherwise normal individuals [3, 4]. The advances made in coronary arterial bypass surgeries and modern methods of myocardial revascularization makes sound and complete knowledge of the normal and variant anatomy of coronary artery [5] indispensable and imperative. Diagonal ...
Attila Borbély, Loek van Heerebeek and Walter J. Paulus 2009, 104:12-14
... from Z-disc widening but possibly also from oxidative myocardial damage, as suggested by the presence of nitrated titin and actin fragments in plasma of patients with Chagas ...
... from Z-disc widening but possibly also from oxidative myocardial damage, as suggested by the presence of nitrated titin and actin fragments in plasma of patients with Chagas ...
Downloaded - VU-dare
... from Z-disc widening but possibly also from oxidative myocardial damage, as suggested by the presence of nitrated titin and actin fragments in plasma of patients with Chagas ...
... from Z-disc widening but possibly also from oxidative myocardial damage, as suggested by the presence of nitrated titin and actin fragments in plasma of patients with Chagas ...
Preview the material
... provides an overview of cardiac arrhythmias in terms of pathogenesis and clinical presentation. Overview of Arrhythmias Arrhythmias are relatively common in the pediatric cardiac intensive care unit. One study revealed 59% of neonates and 79% of older children have arrhythmias within 24 hours of sur ...
... provides an overview of cardiac arrhythmias in terms of pathogenesis and clinical presentation. Overview of Arrhythmias Arrhythmias are relatively common in the pediatric cardiac intensive care unit. One study revealed 59% of neonates and 79% of older children have arrhythmias within 24 hours of sur ...
Carrent issues of the aortic functional morphology
... around the heart and large blood vessels, one of which, according to their data, is constant. It is located on the dorsal surface of the point of bifurcation of the pulmonary trunk and is supplied with blood through its branches. The descriptions of this glomus by other authors are very contradictor ...
... around the heart and large blood vessels, one of which, according to their data, is constant. It is located on the dorsal surface of the point of bifurcation of the pulmonary trunk and is supplied with blood through its branches. The descriptions of this glomus by other authors are very contradictor ...
ACC/AHA/NASPE Guideline for Implantation of Cardiac Pacemakers
... Gregoratos G. et al. ACC/AHA/NASPE 2002 guideline update for implantation of cardiac pacemakers and antiarrhythmia devices: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines. 2002. Available at www.acc.org/clinical/guidelines/pacemaker/pacema ...
... Gregoratos G. et al. ACC/AHA/NASPE 2002 guideline update for implantation of cardiac pacemakers and antiarrhythmia devices: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines. 2002. Available at www.acc.org/clinical/guidelines/pacemaker/pacema ...
Care of the Patient with Temporary Pacemaker
... You may need to test the sensing threshold if you suspect that there is over-sensing (sensing of electrical activity that is not an accurate reflection of atrial or ventricular depolarization). In the event of under-sensing (pacemaker does not sense electrical activity that should be sensed), you ca ...
... You may need to test the sensing threshold if you suspect that there is over-sensing (sensing of electrical activity that is not an accurate reflection of atrial or ventricular depolarization). In the event of under-sensing (pacemaker does not sense electrical activity that should be sensed), you ca ...
View
... Syncope is defined as a transient loss of consciousness with loss of postural tone, due to global cerebral ischaemia, usually associated with spontaneous, rapid and complete recovery. It is a relatively common symptom and has been estimated as being the primary complaint in 1.7% of presentations to ...
... Syncope is defined as a transient loss of consciousness with loss of postural tone, due to global cerebral ischaemia, usually associated with spontaneous, rapid and complete recovery. It is a relatively common symptom and has been estimated as being the primary complaint in 1.7% of presentations to ...
ACC/AHA/NASPE Guideline for Implantation of
... Gregoratos G. et al. ACC/AHA/NASPE 2002 guideline update for implantation of cardiac pacemakers and antiarrhythmia devices: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines. 2002. Available at www.acc.org/clinical/guidelines/pacemaker/pacema ...
... Gregoratos G. et al. ACC/AHA/NASPE 2002 guideline update for implantation of cardiac pacemakers and antiarrhythmia devices: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines. 2002. Available at www.acc.org/clinical/guidelines/pacemaker/pacema ...
Dual atrioventricular nodal non-re
... with other cardiac pathologies (including those related to the cardiac conduction system) apart from AVNRT. Patients diagnosed with DAVNNT initially presented with various symptoms. The most commonly reported symptoms are palpitations.7 Less common unspecific symptoms include dyspnoea, syncope, dizz ...
... with other cardiac pathologies (including those related to the cardiac conduction system) apart from AVNRT. Patients diagnosed with DAVNNT initially presented with various symptoms. The most commonly reported symptoms are palpitations.7 Less common unspecific symptoms include dyspnoea, syncope, dizz ...
Hypertrophic cardiomyopathy
Hypertrophic cardiomyopathy (HCM) is a primary disease of the myocardium (the muscle of the heart) in which a portion of the myocardium is hypertrophied (thickened) without any obvious cause, creating functional impairment of the cardiac muscle. It is a leading cause of sudden cardiac death in young athletes.The occurrence of hypertrophic cardiomyopathy is a significant cause of sudden unexpected cardiac death in any age group and as a cause of disabling cardiac symptoms. Younger people are likely to have a more severe form of hypertrophic cardiomyopathy.HCM is frequently asymptomatic until sudden cardiac death, and for this reason some suggest routinely screening certain populations for this disease.A cardiomyopathy is a disease that affects the muscle of the heart. With HCM, the myocytes (cardiac contractile cells) in the heart increase in size, which results in the thickening of the heart muscle. In addition, the normal alignment of muscle cells is disrupted, a phenomenon known as myocardial disarray. HCM also causes disruptions of the electrical functions of the heart. HCM is most commonly due to a mutation in one of nine sarcomeric genes that results in a mutated protein in the sarcomere, the primary component of the myocyte (the muscle cell of the heart). These are predominantly single-point missense mutations in the genes for beta-myosin heavy chain (MHC), myosin-binding protein C, cardiac troponinT, or tropomyosin. These mutations cause myofibril and myocyte structural abnormalities and possible deficiencies in force generation. Not to be confused with dilated cardiomyopathy or any other cardiomyopathy.While most literature so far focuses on European, American, and Japanese populations, HCM appears in all ethnic groups. The prevalence of HCM is about 0.2% to 0.5% of the general population.