Catheter Ablation in the Treatment of Atrial Fibrillation
... • To date there is no evidence that treatment of AF by ablation improves mortality, although there are uncontrolled data suggesting that this may be the case. • Therefore, asymptomatic patients should not be offered curative ablation of AF, except in the case of those patients undergoing cardiac sur ...
... • To date there is no evidence that treatment of AF by ablation improves mortality, although there are uncontrolled data suggesting that this may be the case. • Therefore, asymptomatic patients should not be offered curative ablation of AF, except in the case of those patients undergoing cardiac sur ...
Cardiopulmonary Resuscitation by Chest Compression Alone: A
... colleagues, in a prospective observational study, found similar outcomes in cardiac-only and conventional CPR groups, at least for those with arrest intervals ≤15 min.63 For very-long-duration arrests (>15 min), neurologically favorable 1-year survival was greater in the conventional CPR group, thou ...
... colleagues, in a prospective observational study, found similar outcomes in cardiac-only and conventional CPR groups, at least for those with arrest intervals ≤15 min.63 For very-long-duration arrests (>15 min), neurologically favorable 1-year survival was greater in the conventional CPR group, thou ...
Topology of Blood Transport in the Human Left Ventricle by Novel
... intraventricular flow dynamics could have a potential role in overall chamber properties, by facilitating filling, increasing ejection efficiency, and avoiding blood stasis inside the ventricular chamber15,18,25,35,36,37 These three aspects may be of key importance in patients with dilated cardiomyopath ...
... intraventricular flow dynamics could have a potential role in overall chamber properties, by facilitating filling, increasing ejection efficiency, and avoiding blood stasis inside the ventricular chamber15,18,25,35,36,37 These three aspects may be of key importance in patients with dilated cardiomyopath ...
The Wetsuit Effect - Digital Scholarship @UNLV
... symptom of pulmonary edema- profuse frothy hemoptysis, or coughing up blood. A tight wetsuit, among other factors, may be a trigger for the development of acute pulmonary edema. Combined with cold water immersion, which increases central vascular volume and blood pressure, a wetsuit that constricts ...
... symptom of pulmonary edema- profuse frothy hemoptysis, or coughing up blood. A tight wetsuit, among other factors, may be a trigger for the development of acute pulmonary edema. Combined with cold water immersion, which increases central vascular volume and blood pressure, a wetsuit that constricts ...
Bicuspid aortic and pulmonary valves complicated by acute aortic
... 10 cases reported in the literature. The true incidence of bicuspid pulmonary valve, however, remains unknown perhaps due to fact that the clinical course is usually benign [35]. Recently, Luk et al. reported autopsy case of a 70-year-old man with bilateral congenitally bicuspid aortic and pulmonary ...
... 10 cases reported in the literature. The true incidence of bicuspid pulmonary valve, however, remains unknown perhaps due to fact that the clinical course is usually benign [35]. Recently, Luk et al. reported autopsy case of a 70-year-old man with bilateral congenitally bicuspid aortic and pulmonary ...
Review Article Epicardial Ablation For Ventricular Tachycardia
... the presence of fat thickness <5 mm there was no significant difference in the peak-to-peak bipolar voltage amplitude, in the bipolar electrogram duration and in the pacing threshold. Fat layers > 5 mm made ventricular capture impossible even at 10 mA. Based on these data and on our experience we th ...
... the presence of fat thickness <5 mm there was no significant difference in the peak-to-peak bipolar voltage amplitude, in the bipolar electrogram duration and in the pacing threshold. Fat layers > 5 mm made ventricular capture impossible even at 10 mA. Based on these data and on our experience we th ...
1 General IntroductIon Pulmonary arterIal
... pulmonary artery pressure of 25 mmHg or higher at rest, as assessed by right heart catheteriza- ...
... pulmonary artery pressure of 25 mmHg or higher at rest, as assessed by right heart catheteriza- ...
Steeper restitution slopes across right ventricular endocardium in
... a low-risk patient during various S1-S2 coupling intervals. In this example, the ARI of the S2, derived from automated activation and recovery time measurements, decreases with shorter S1-S2 coupling intervals. The ARI measured after 2 min of preconditioning pacing at CL 500 ms was 291 (SD 19) ms in ...
... a low-risk patient during various S1-S2 coupling intervals. In this example, the ARI of the S2, derived from automated activation and recovery time measurements, decreases with shorter S1-S2 coupling intervals. The ARI measured after 2 min of preconditioning pacing at CL 500 ms was 291 (SD 19) ms in ...
Bilateral Pleural Effusions: a rare presentation of Constrictive P
... Constrictive Pericarditis is a rare disease that can be a challenge to diagnose unless a high index of suspicion is maintained.1 Classically it presents with symptoms of heart failure and as pericardial thickening or calcification on imaging studies. However, initial diagnostic studies remain non-sp ...
... Constrictive Pericarditis is a rare disease that can be a challenge to diagnose unless a high index of suspicion is maintained.1 Classically it presents with symptoms of heart failure and as pericardial thickening or calcification on imaging studies. However, initial diagnostic studies remain non-sp ...
Carotid dP/dt as a Psychophysiological Index of Sympathetic
... should be briefly noted that the effect of parasympathetic activity on ventricular contractility is more complicated and thus modifies the picture painted above. One complication is that the effect exerted by the parasympathetic system is modified by its interaction with the sympathetic system. For ...
... should be briefly noted that the effect of parasympathetic activity on ventricular contractility is more complicated and thus modifies the picture painted above. One complication is that the effect exerted by the parasympathetic system is modified by its interaction with the sympathetic system. For ...
Supraventricular Arrhythmias
... Atrial Fibrillation • Advantages of rhythm control: – Abolition of symptoms – Halting atrial enlargement – Improvement in left ventricular function and exercise capacity ...
... Atrial Fibrillation • Advantages of rhythm control: – Abolition of symptoms – Halting atrial enlargement – Improvement in left ventricular function and exercise capacity ...
The Association of Postoperative Right Ventricular Restrictive
... diastolic flow reversal. We classified the subjects as having restrictive or nonrestrictive physiology depending on the echocardiographic findings. The mean of 3 measurements was obtained. We reviewed the charts to check the operative procedure of the patients. Determination of RV Systolic dysfunc ...
... diastolic flow reversal. We classified the subjects as having restrictive or nonrestrictive physiology depending on the echocardiographic findings. The mean of 3 measurements was obtained. We reviewed the charts to check the operative procedure of the patients. Determination of RV Systolic dysfunc ...
Influence of pacing site on canine left ventricular contraction
... Results of previous studies indicate that with epicardial ventricular pacing the muscle fibers in the epicardial layers near the pacing site are activated earlier than the remainder of the left ventricle. We further hypothesize that as the propagating electrical impulse travels through myocardial ti ...
... Results of previous studies indicate that with epicardial ventricular pacing the muscle fibers in the epicardial layers near the pacing site are activated earlier than the remainder of the left ventricle. We further hypothesize that as the propagating electrical impulse travels through myocardial ti ...
Segers`s Paper - Bison Academy
... Because Ea depends both on R and C, it is clear that it cannot represent a unique arterial load. The question is whether different combinations of R and C, giving the same Ea, actually occur in humans, because in aging and in hypertension both R and arterial stiffness tend to increase. However, the ...
... Because Ea depends both on R and C, it is clear that it cannot represent a unique arterial load. The question is whether different combinations of R and C, giving the same Ea, actually occur in humans, because in aging and in hypertension both R and arterial stiffness tend to increase. However, the ...
Emerging mechanisms of T-tubule remodelling in heart failure
... using stimulated emission depletion (STED) imaging technique indicated that the T-tubule diameter is 200 nm in murine myocytes.25 (Note: the smaller T-tubule diameter detected by STED imaging could be due to a better spatial resolution offered by this technique than confocal microscopy). The lumens ...
... using stimulated emission depletion (STED) imaging technique indicated that the T-tubule diameter is 200 nm in murine myocytes.25 (Note: the smaller T-tubule diameter detected by STED imaging could be due to a better spatial resolution offered by this technique than confocal microscopy). The lumens ...
Numerical simulations of blood flow in the left side of the heart
... responds to the applied changes. A future goal is to create subject-specific models that may have the potential to support professionals in clinical decision-making by performing virtual surgery. By doing this, new insight into the influence of surgical intervention on the blood flow can be obtained ...
... responds to the applied changes. A future goal is to create subject-specific models that may have the potential to support professionals in clinical decision-making by performing virtual surgery. By doing this, new insight into the influence of surgical intervention on the blood flow can be obtained ...
PDF Article - ScienceDirect
... ms at 16 times threshold) or by increasing the pulse width above 2 ms (282 ± 13 ms at a pulse width of 2 ms; 282 ± 14 ms at a pulse width of 5 ms). The effect of varying stimulus intensity on ventricular tachycardia induction was examined in a second group of 11 patients with documented, spontaneous ...
... ms at 16 times threshold) or by increasing the pulse width above 2 ms (282 ± 13 ms at a pulse width of 2 ms; 282 ± 14 ms at a pulse width of 5 ms). The effect of varying stimulus intensity on ventricular tachycardia induction was examined in a second group of 11 patients with documented, spontaneous ...
Left Ventricular Papillary Muscles
... The left ventricular papillary muscles appear to be the last portions of the heart to be perfused by coronary arterial blood. As a consequence they are sensitive anatomic markers of myocardial ischemia. Foci of necrosis or fibrosis therefore are commonly seen in these structures, particularly the po ...
... The left ventricular papillary muscles appear to be the last portions of the heart to be perfused by coronary arterial blood. As a consequence they are sensitive anatomic markers of myocardial ischemia. Foci of necrosis or fibrosis therefore are commonly seen in these structures, particularly the po ...
3D Echocardiography: A Review of the Current Status and Future
... and techniques offer superior image quality, greater accuracy, and expanding capabilities. As a result, more and improved imaging modalities are available for evaluating cardiac anatomy, ventricular function, blood flow velocity, and valvular diseases. Threedimensional (3D) echocardiography offers t ...
... and techniques offer superior image quality, greater accuracy, and expanding capabilities. As a result, more and improved imaging modalities are available for evaluating cardiac anatomy, ventricular function, blood flow velocity, and valvular diseases. Threedimensional (3D) echocardiography offers t ...
Color Doppler Evaluation of Valvular Regurgitation in
... However, as the quantification of the quality of the two-dimensional echocardiographic images may be difficult, fuirther investigation is necessary in reference to the question of why the prevalence of regurgitation appears to decrease with age. We19 have already reported that valvular regurgitation ...
... However, as the quantification of the quality of the two-dimensional echocardiographic images may be difficult, fuirther investigation is necessary in reference to the question of why the prevalence of regurgitation appears to decrease with age. We19 have already reported that valvular regurgitation ...
Giant left atrial appendage aneurysm compressing the left anterior
... (LA) and or the appendage.3 LAAA is usually associated with atrial arrhythmias and thromboembolism. The most common symptoms are palpitation and/or dyspnea.4 Here, we are presenting a 16-year-old boy with a 3 months history of dyspnea and palpitation. On presentation, he had an atrial tachycardia ...
... (LA) and or the appendage.3 LAAA is usually associated with atrial arrhythmias and thromboembolism. The most common symptoms are palpitation and/or dyspnea.4 Here, we are presenting a 16-year-old boy with a 3 months history of dyspnea and palpitation. On presentation, he had an atrial tachycardia ...
Linköping University Post Print Computer-assisted determination of left ventricular endocardial borders reduces
... (LVEF) and wall thickness are strong predictors for survival in most types of cardiac diseases. These measurements have important implications for therapy. The optimal timing for valve surgery and supportive surgery for heart failure such as ventricular restraint, ventricular restoration and left ve ...
... (LVEF) and wall thickness are strong predictors for survival in most types of cardiac diseases. These measurements have important implications for therapy. The optimal timing for valve surgery and supportive surgery for heart failure such as ventricular restraint, ventricular restoration and left ve ...
Effect of Right Ventricular Pacing on Ventricular Rhythm During
... unlikely that during right ventricular pacing autonomic inftuences could result in sufficient anterograde conduction block to eliminate all anterogradely conducted impulses. In fact, the latency of the baroreceptor effect is at least twice the length of the ventricular pacing interval at which all s ...
... unlikely that during right ventricular pacing autonomic inftuences could result in sufficient anterograde conduction block to eliminate all anterogradely conducted impulses. In fact, the latency of the baroreceptor effect is at least twice the length of the ventricular pacing interval at which all s ...
Pectus excavatum
... Pectus excavatum, funnel chest, depressed pulmonary function (Orzalesi and Cook, 1965; sternum, and chonechondrosternon (Ochsner and Polgar and Koop, 1963). The authors who have carried out these investiDeBakey, 1939; Ochsner and Ochsner, 1966) are pseudonyms describing the same deformity of gations ...
... Pectus excavatum, funnel chest, depressed pulmonary function (Orzalesi and Cook, 1965; sternum, and chonechondrosternon (Ochsner and Polgar and Koop, 1963). The authors who have carried out these investiDeBakey, 1939; Ochsner and Ochsner, 1966) are pseudonyms describing the same deformity of gations ...
Systolic and Diastolic Heart Failure (HFrEF and HFpEF) 2016
... • Left sided ''forward'' failure overlaps with right sided ''backward'' failure. • Most common cause of right-sided heart failure is left-sided heart failure, therefore, patients present with both sets of signs and symptoms. • Dullness of the lung fields to finger percussion and reduced breath sound ...
... • Left sided ''forward'' failure overlaps with right sided ''backward'' failure. • Most common cause of right-sided heart failure is left-sided heart failure, therefore, patients present with both sets of signs and symptoms. • Dullness of the lung fields to finger percussion and reduced breath sound ...
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.