Vectorcardiographic evaluation of ventricular repolarization in
... Waller recorded the first human electrocardiogram (ECG) and in 1887, he was able to obtain the first human electrocardiogram from the body surface.1 Willem Einthoven further investigated cardiac electrical activity and could identify four distinct waves on the ECG.2 The concept of “the area of QRST” ...
... Waller recorded the first human electrocardiogram (ECG) and in 1887, he was able to obtain the first human electrocardiogram from the body surface.1 Willem Einthoven further investigated cardiac electrical activity and could identify four distinct waves on the ECG.2 The concept of “the area of QRST” ...
Surgery for Congenital Heart Diseases
... A developmental malformation of one or more of the components of MV apparatus, including LA wall adjacent insufficiency or a combined lesion Infancy Mild and moderate Sx without MVR : Supravalvular ring, commmissural fusion Other circumstances : only for infants with heart failure Childhood Consider ...
... A developmental malformation of one or more of the components of MV apparatus, including LA wall adjacent insufficiency or a combined lesion Infancy Mild and moderate Sx without MVR : Supravalvular ring, commmissural fusion Other circumstances : only for infants with heart failure Childhood Consider ...
Lipomatous Hypertrophy of the Interatrial Septum Accompanied By
... It is supported by studies that LHIS can induce arrhythmia and LHIS related p wave alterations, atrial arrhythmias and sudden cardiac deaths.8,10-13 The characteristic appearance of top and/or bottom part of interatrial septum which seems to be separated from foramen ovale is called as ‘dumbbell sha ...
... It is supported by studies that LHIS can induce arrhythmia and LHIS related p wave alterations, atrial arrhythmias and sudden cardiac deaths.8,10-13 The characteristic appearance of top and/or bottom part of interatrial septum which seems to be separated from foramen ovale is called as ‘dumbbell sha ...
The Violin Heart
... non-compaction, hypertrophic cardiomyopathy and levo-transposition of the great arteries. The production of sound4,5 is not the only physiological action of tendons: Bhatt et al6 have demonstrated that patients with cardiomyopathy who have false tendons present in the left ventricular cavity have ...
... non-compaction, hypertrophic cardiomyopathy and levo-transposition of the great arteries. The production of sound4,5 is not the only physiological action of tendons: Bhatt et al6 have demonstrated that patients with cardiomyopathy who have false tendons present in the left ventricular cavity have ...
CORONARY ARTERIES
... SA Node (Sinoatrial Node) – Main pacemaker of the heart – in a healthy heart the SA node is in charge. The impulse starts here and has an intrinsic rate of 60100 beats per minute. Internodal tracts and Bachmann’s Bundle- impulse travels through the right and left atrium causing depolarization AV No ...
... SA Node (Sinoatrial Node) – Main pacemaker of the heart – in a healthy heart the SA node is in charge. The impulse starts here and has an intrinsic rate of 60100 beats per minute. Internodal tracts and Bachmann’s Bundle- impulse travels through the right and left atrium causing depolarization AV No ...
Case
... Amiodarone is the most effective antiarrhythmic drugs for the treatment of supraventricular and ventricular tachyarrhythmias. Despite that, amiodarone has numerous adverse effects. Amiodarone may prolong QT interval, although polymorphic ventricular tachycardia (torsades de pointes) is rare. Prolong ...
... Amiodarone is the most effective antiarrhythmic drugs for the treatment of supraventricular and ventricular tachyarrhythmias. Despite that, amiodarone has numerous adverse effects. Amiodarone may prolong QT interval, although polymorphic ventricular tachycardia (torsades de pointes) is rare. Prolong ...
Subaortic Stenosis - Adult Congenital Heart Association
... subaortic stenosis. Your doctor may hear a rumbling sound when he listens to your heart. This occurs as the blood goes through the obstructed area under the aortic valve. Lab tests are usually normal. An echocardiogram or heart ultrasound will show the level and severity of the obstruction. It will ...
... subaortic stenosis. Your doctor may hear a rumbling sound when he listens to your heart. This occurs as the blood goes through the obstructed area under the aortic valve. Lab tests are usually normal. An echocardiogram or heart ultrasound will show the level and severity of the obstruction. It will ...
Should right heart catheterization be realized in patients with a
... transvalvular mean gradients, respectively. Left ventricular ejection fraction was 40% and right ventricular function was severely decreased, with a tricuspid annular plane systolic excursion of 6 mm. Owing to the refractory right heart fail ure, the patient was considered for cardiac trans planta ...
... transvalvular mean gradients, respectively. Left ventricular ejection fraction was 40% and right ventricular function was severely decreased, with a tricuspid annular plane systolic excursion of 6 mm. Owing to the refractory right heart fail ure, the patient was considered for cardiac trans planta ...
Syndrome of Left Ventricular-Right Atrial
... treated with intramuscular quinidine and the mechanism reverted to a sinus one within 18 hours. The patient was discharged to return at a later date for surgical repair of his defect. He was admitted for the third time on Jan. 5, 1954. He had been well between admissions and physical examination was ...
... treated with intramuscular quinidine and the mechanism reverted to a sinus one within 18 hours. The patient was discharged to return at a later date for surgical repair of his defect. He was admitted for the third time on Jan. 5, 1954. He had been well between admissions and physical examination was ...
Diastolic Heart Failure — Abnormalities in Active
... The diastolic pressure–volume relation can be described by an exponential equation, P=AebV, where P is the left ventricular diastolic pressure, V is the left ventricular diastolic volume, and A and b are curvefitting constants used to quantify passive stiffness.4 We reasoned that the abnormally slow ...
... The diastolic pressure–volume relation can be described by an exponential equation, P=AebV, where P is the left ventricular diastolic pressure, V is the left ventricular diastolic volume, and A and b are curvefitting constants used to quantify passive stiffness.4 We reasoned that the abnormally slow ...
Left ventricular adaptive response after surgery of aortic valve
... those with deteriorated ejection fraction show better short and long-term survival after surgery and, therefore, a patient with low LVEF should be referred to surgery19. Most patients had preserved LVEF and only 3 had LVEF lower than 50%. LV hypertrophy secondary to severe aortic stenosis can impact ...
... those with deteriorated ejection fraction show better short and long-term survival after surgery and, therefore, a patient with low LVEF should be referred to surgery19. Most patients had preserved LVEF and only 3 had LVEF lower than 50%. LV hypertrophy secondary to severe aortic stenosis can impact ...
Automatic External Defibrillators
... chest pain and electrical instability of the heart muscle tissue. Electrical instability of the heart causes ventricular fibrillation (chaotic electrical disturbance). Rhythmic transmission of electrical signals in the heart is important for the regular beating (pumping) of the heart. A heart underg ...
... chest pain and electrical instability of the heart muscle tissue. Electrical instability of the heart causes ventricular fibrillation (chaotic electrical disturbance). Rhythmic transmission of electrical signals in the heart is important for the regular beating (pumping) of the heart. A heart underg ...
cardiology - Turner White
... low-voltage, P-R segment and ST-T changes of pericarditis, and electrical alternation,16 which may affect any electrocardiographic waves.17 Occurring in only approximately 20% of cardiac tamponade cases, electrical alternans is an insensitive sign,17 unless complete alternans is present.18 Chest Rad ...
... low-voltage, P-R segment and ST-T changes of pericarditis, and electrical alternation,16 which may affect any electrocardiographic waves.17 Occurring in only approximately 20% of cardiac tamponade cases, electrical alternans is an insensitive sign,17 unless complete alternans is present.18 Chest Rad ...
Long-term Use of Anti-inflammatory Drugs and Risk of Atrial Fibrillation
... peripheral vasodilatation and anaphylactic reactions.37,38 However, there is as yet no conclusive evidence for any of these mechanisms, and it was concluded then that high-dose corticosteroid therapy may act as a trigger rather than as a single cause for AF, in line with the earlier-described trigge ...
... peripheral vasodilatation and anaphylactic reactions.37,38 However, there is as yet no conclusive evidence for any of these mechanisms, and it was concluded then that high-dose corticosteroid therapy may act as a trigger rather than as a single cause for AF, in line with the earlier-described trigge ...
Significance of right bundle branch block in the diagnosis of
... disease. Myocardial preservation during aortic cross-clamping has substantially improved and operative mortality has reached a remarkably low level. However, the incidence of early postoperative myocardial ischemia of various degrees remains a rather common complication with a variance of 2±20% for ...
... disease. Myocardial preservation during aortic cross-clamping has substantially improved and operative mortality has reached a remarkably low level. However, the incidence of early postoperative myocardial ischemia of various degrees remains a rather common complication with a variance of 2±20% for ...
PhD THESIS - UMF Craiova
... in our study similar with other studies [14] but discordant with the USRDS, where the percentage of women with GFR <60 ml/min/1.73m2 was higher that that of men, and with recent data from England, Canada and the Netherlands [15, 16, 17]. More than half of the patients had concentric LVH. Eccentric h ...
... in our study similar with other studies [14] but discordant with the USRDS, where the percentage of women with GFR <60 ml/min/1.73m2 was higher that that of men, and with recent data from England, Canada and the Netherlands [15, 16, 17]. More than half of the patients had concentric LVH. Eccentric h ...
Myocardial Calcification and Fibrosis in Dystrophic Mice is Reduced
... and stresses. RhoA activation in MSCs induces their osteogenesis potential, inhibits their adipogenic potential, mediates BMPinduced signaling, and promotes osteoblastic cell survival (5). The involvement of RhoA in mediating inflammatory processes and myocardial fibrosis has previously been describ ...
... and stresses. RhoA activation in MSCs induces their osteogenesis potential, inhibits their adipogenic potential, mediates BMPinduced signaling, and promotes osteoblastic cell survival (5). The involvement of RhoA in mediating inflammatory processes and myocardial fibrosis has previously been describ ...
Cardiac Resynchronization in Heart
... common cause of death. In addition, the cost involved in the management of this problem is enormous and continues to climb.1,2 Cardiac transplantation, the gold standard of treatment for advanced CHF, is restricted by the lack of available donors and other factors, such as cost, that exclude a signi ...
... common cause of death. In addition, the cost involved in the management of this problem is enormous and continues to climb.1,2 Cardiac transplantation, the gold standard of treatment for advanced CHF, is restricted by the lack of available donors and other factors, such as cost, that exclude a signi ...
Ventricular Structure and Function in Hypertensive Participants With
... Transmitral Doppler LV filling recordings were performed from the apical 4-chamber view and analyzed for diastolic filling indexes, including peak E- and A-wave velocities and their ratio. Statistical analysis. Data are expressed as mean ⫾ standard deviation. Chi-square test or analysis of variance ...
... Transmitral Doppler LV filling recordings were performed from the apical 4-chamber view and analyzed for diastolic filling indexes, including peak E- and A-wave velocities and their ratio. Statistical analysis. Data are expressed as mean ⫾ standard deviation. Chi-square test or analysis of variance ...
Valvular Heart Diseases - Interventional Cardiology Journal
... treatment of symptomatic aortic stenosis (AS). In properly selected patients, this surgical procedure offers substantial improvements in symptoms and life expectancy (Figure 2). However, approximately one third of patients are not referred to surgery and the reasons include the high risk of heart su ...
... treatment of symptomatic aortic stenosis (AS). In properly selected patients, this surgical procedure offers substantial improvements in symptoms and life expectancy (Figure 2). However, approximately one third of patients are not referred to surgery and the reasons include the high risk of heart su ...
Clinical Practice Guidelines on UA/NSTEMI 2002
... inversion in the precordial leads Other ECG changes include bundle branch block (BBB)* and cardiac arrhythmias, especially sustained ventricular tachycardia. Serial ECGs should be done as the ST changes may evolve. However, a completely normal ECG does not exclude the diagnosis of UA / NSTEMI. *New ...
... inversion in the precordial leads Other ECG changes include bundle branch block (BBB)* and cardiac arrhythmias, especially sustained ventricular tachycardia. Serial ECGs should be done as the ST changes may evolve. However, a completely normal ECG does not exclude the diagnosis of UA / NSTEMI. *New ...
Module 6
... quinidine. The QT interval (0.6 seconds) is markedly prolonged for the heart rate (65/min) and the QT interval is greater than one half the R-R ...
... quinidine. The QT interval (0.6 seconds) is markedly prolonged for the heart rate (65/min) and the QT interval is greater than one half the R-R ...
Hemodynamic variables and mortality in
... epinephrine were used as first-line agents, while milrinone served as a second-line drug. During the first 24 hours after intensive care unit admission, levosimendan (no bolus injection, 0.1 to 0.2 μg/kg/min for 24 hours) was administered in four (3.4%) study patients as a last-resort therapy only. ...
... epinephrine were used as first-line agents, while milrinone served as a second-line drug. During the first 24 hours after intensive care unit admission, levosimendan (no bolus injection, 0.1 to 0.2 μg/kg/min for 24 hours) was administered in four (3.4%) study patients as a last-resort therapy only. ...
Does the 2-Agonist Clenbuterol Help to Maintain
... Key Words: cardiomyopathy 䡲 heart-assist device 䡲 heart failure 䡲 inotropic agents 䡲 receptors, adrenergic, beta ...
... Key Words: cardiomyopathy 䡲 heart-assist device 䡲 heart failure 䡲 inotropic agents 䡲 receptors, adrenergic, beta ...
Cardiac contractility modulation
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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.