AHEART August 46/2 - AJP
... CHAOS THEORY, referring to the overlapping mathematical disciplines of fractal geometry and nonlinear dynamics, has been used to provide insight into the pathophysiology and prognostic importance of cardiac arrhythmias (2–5, 8, 22, 23). In the mathematical sense, ‘‘chaos’’ refers to a system that is ...
... CHAOS THEORY, referring to the overlapping mathematical disciplines of fractal geometry and nonlinear dynamics, has been used to provide insight into the pathophysiology and prognostic importance of cardiac arrhythmias (2–5, 8, 22, 23). In the mathematical sense, ‘‘chaos’’ refers to a system that is ...
Torsades de pointes( TdP )
... “Twisting of the spikes“ : French term First described by Dessertenne in 1966 Rare variety of ventricular tachycardia A polymorphic ventricular tachycardia with twisting of the QRS complex around the isoelectric baseline usually terminates spontaneously Fall in arterial blood pressure → syncope ...
... “Twisting of the spikes“ : French term First described by Dessertenne in 1966 Rare variety of ventricular tachycardia A polymorphic ventricular tachycardia with twisting of the QRS complex around the isoelectric baseline usually terminates spontaneously Fall in arterial blood pressure → syncope ...
Use of frog ventricle to examine mechanical and electrical activity of
... RICHARDSON,AND B. MAKOBA. Use of frog ventricle to examine mechanical and electrical activity of heart. Am. J. Physiol. 256 (Adv. Physiol. Educ. 1): S9-S13, 1989.-This report describes a Langendorff heart preparation, which utilizes frog rather than mammalian hearts to demonstrate both mechanical an ...
... RICHARDSON,AND B. MAKOBA. Use of frog ventricle to examine mechanical and electrical activity of heart. Am. J. Physiol. 256 (Adv. Physiol. Educ. 1): S9-S13, 1989.-This report describes a Langendorff heart preparation, which utilizes frog rather than mammalian hearts to demonstrate both mechanical an ...
How To Differentiate Right Ventricular Outflow Tract Tachycardia
... Ventricular tachycardia may originate from the diseased areas and cause haemodynamically non-tolerated ventricular tachycardia, syncope, or sudden death already in young patients. Time of first diagnosis is usually before the age of 40 and not infrequently already in adolescence. The aetiology of AR ...
... Ventricular tachycardia may originate from the diseased areas and cause haemodynamically non-tolerated ventricular tachycardia, syncope, or sudden death already in young patients. Time of first diagnosis is usually before the age of 40 and not infrequently already in adolescence. The aetiology of AR ...
Pathological observations and tissue quantitative assessment of
... of death [19]. Therefore, the relationship between structural abnormalities and sudden death needs further research. Ventricular tachycardia and fibrillation appear to be responsible for sudden deaths in asymptomatic youngsters and athletes with ARVC [2022]. Fatty or fibrofatty infiltration of myoca ...
... of death [19]. Therefore, the relationship between structural abnormalities and sudden death needs further research. Ventricular tachycardia and fibrillation appear to be responsible for sudden deaths in asymptomatic youngsters and athletes with ARVC [2022]. Fatty or fibrofatty infiltration of myoca ...
Arrhythmogenic right ventricular cardiomyopathy secondary to
... by the infiltration. Small foci of this yellowish tissue were also multifocally observed in both the left and right atria (Fig. 2a–d). Histopathological examination of the myocardium, epicardium and endocardium revealed similar changes in both ventricles. Cardiomyocytes were markedly reduced in numb ...
... by the infiltration. Small foci of this yellowish tissue were also multifocally observed in both the left and right atria (Fig. 2a–d). Histopathological examination of the myocardium, epicardium and endocardium revealed similar changes in both ventricles. Cardiomyocytes were markedly reduced in numb ...
Role of Bilateral Sympathectomy in the
... innervated by sympathetic nerves from the ventromedial cardiac nerves. High-frequency stimulation in the pulmonary artery induces PVCs from the right ventricular outflow tract, and these nerves have been implicated in the pathophysiology of idiopathic VT. Indeed, the VTs in our patient exhibit featu ...
... innervated by sympathetic nerves from the ventromedial cardiac nerves. High-frequency stimulation in the pulmonary artery induces PVCs from the right ventricular outflow tract, and these nerves have been implicated in the pathophysiology of idiopathic VT. Indeed, the VTs in our patient exhibit featu ...
JacobJessenAbstract2016
... Typical feature of Torsades de Pointes is usually an ectopic ventricular beat followed by a compensatory pause that is terminated by a sinus beat with prolonged QT interval and U wave; another ventricular ectopic beat often falls on the exaggerated U wave of the sinus beat which precipitates TdP (sh ...
... Typical feature of Torsades de Pointes is usually an ectopic ventricular beat followed by a compensatory pause that is terminated by a sinus beat with prolonged QT interval and U wave; another ventricular ectopic beat often falls on the exaggerated U wave of the sinus beat which precipitates TdP (sh ...
Heart sounds: lub dub
... reaching higher than normal pressures. At the end of diastole, the effect of the constriction is most marked and when the atria contract, the RA pressure rises to its highest level, creating the A wave. After the A wave, there is then the usual systolic surge of blood into the atria, with a fall in ...
... reaching higher than normal pressures. At the end of diastole, the effect of the constriction is most marked and when the atria contract, the RA pressure rises to its highest level, creating the A wave. After the A wave, there is then the usual systolic surge of blood into the atria, with a fall in ...
Spontaneous resolution of ventricular tachycardia with right bundle
... right bundle branch block (RBBB) morphology with superior frontal plane axis, and (2) catecholamine-sensitive VT characterized by left bundle branch block (LBBB) morphology with an inferior frontal axis2. Incessant idiopathic VT is a disease of infancy. The most common QRS morphology is that of RBBB ...
... right bundle branch block (RBBB) morphology with superior frontal plane axis, and (2) catecholamine-sensitive VT characterized by left bundle branch block (LBBB) morphology with an inferior frontal axis2. Incessant idiopathic VT is a disease of infancy. The most common QRS morphology is that of RBBB ...
qt interval variability and qt/rr relationship in patients
... New sophisticated methods of the QT duration analysis and its relation to the heart rate give us additional information about dynamicity of the myocardial repolarization, which reflects myocardial vulnerability to generation of malignant arrhythmias 3,4,5. However, many other factors may influence o ...
... New sophisticated methods of the QT duration analysis and its relation to the heart rate give us additional information about dynamicity of the myocardial repolarization, which reflects myocardial vulnerability to generation of malignant arrhythmias 3,4,5. However, many other factors may influence o ...
The QT interval on the ECG is measured from the beginning of the
... For accurate measurement of the QT interval, the relationship between QT and the R–R interval should be reproducible, [Remark 2] particularly in cases with a heart rate of less than 50 bpm or more than 120 bpm. Furthermore, accurate measurement in athletes and children who have a significant beat-to ...
... For accurate measurement of the QT interval, the relationship between QT and the R–R interval should be reproducible, [Remark 2] particularly in cases with a heart rate of less than 50 bpm or more than 120 bpm. Furthermore, accurate measurement in athletes and children who have a significant beat-to ...
Properties of Cardiac Muscle - squ
... Heart function as syncytium “Cardiac muscle cells are mechanically, chemically, and electrically connected to one another, thus, the entire tissue resembles a single, enormous muscle cell. For this reason, cardiac muscle has been called a functional syncytium. “ ...
... Heart function as syncytium “Cardiac muscle cells are mechanically, chemically, and electrically connected to one another, thus, the entire tissue resembles a single, enormous muscle cell. For this reason, cardiac muscle has been called a functional syncytium. “ ...
Interventional Heart Failure - Cardiac Interventions Today
... displace blood from the left ventricle into the ascending aorta. The devices can be placed via femoral arterial access in retrograde fashion across the aortic valve into the left ventricle. Three distinct catheters can be used for left ventricular support and include the 2.5 LP, the CP, and the 5.0 ...
... displace blood from the left ventricle into the ascending aorta. The devices can be placed via femoral arterial access in retrograde fashion across the aortic valve into the left ventricle. Three distinct catheters can be used for left ventricular support and include the 2.5 LP, the CP, and the 5.0 ...
post-myocardial infarction arrhythmia risk
... GENERAL CONSIDERATIONS ............................................................................................................... ‐ 2 ‐ ...
... GENERAL CONSIDERATIONS ............................................................................................................... ‐ 2 ‐ ...
utmj submission template - University of Toronto Medical Journal
... that is characterized by trabeculations and recesses within the ventricular myocardium, most commonly affecting the LV. Patients typically present with heart failure symptoms and also often have concurrent diastolic and systolic dysfunction. In addition to developing heart failure, these patients ap ...
... that is characterized by trabeculations and recesses within the ventricular myocardium, most commonly affecting the LV. Patients typically present with heart failure symptoms and also often have concurrent diastolic and systolic dysfunction. In addition to developing heart failure, these patients ap ...
Use of Right Ventricular Support with a Centrifugal Pump in Post
... Abstract The optimal treatment method for right ventricular failure after valve surgery complicated by a low cardiac output has not been determined, although several case reports have been published on patients with ventricular failure and arrhythmia who were bridged to cardiac transplantation using ...
... Abstract The optimal treatment method for right ventricular failure after valve surgery complicated by a low cardiac output has not been determined, although several case reports have been published on patients with ventricular failure and arrhythmia who were bridged to cardiac transplantation using ...
Left Ventricular Pseudoaneurysm After Inferior Wall Myocardial
... narrow orifice is considered to be most suggestive of a pseudoaneurysm on contrast left ventriculography; in addition, pseudoaneurysms appear avascular on coronary angiography.8,9 The echocardiographic detection of pseudoaneurysm was initially reported in 1975. The characteristic features of pseudoa ...
... narrow orifice is considered to be most suggestive of a pseudoaneurysm on contrast left ventriculography; in addition, pseudoaneurysms appear avascular on coronary angiography.8,9 The echocardiographic detection of pseudoaneurysm was initially reported in 1975. The characteristic features of pseudoa ...
Document
... Definition: 1AVB is a rhythm in which the electrical impulse which leaves the SA node and travels through the atria, AV node, Bundle of His to purkininjie fibers is slowed down and takes longer than normal to arrive at its destination. The normal PR interval is 0.12- 0.20 seconds. A 1AVBT is greater ...
... Definition: 1AVB is a rhythm in which the electrical impulse which leaves the SA node and travels through the atria, AV node, Bundle of His to purkininjie fibers is slowed down and takes longer than normal to arrive at its destination. The normal PR interval is 0.12- 0.20 seconds. A 1AVBT is greater ...
Coordination of the cardiac cycle. ECG
... excitation over atria wall (pacemaker) SAN sinoatrial node • Patch of tissue at the base of atrium/top of septum of heart where wave of excitation is delayed and which conducts electrical excitation from atria to septum AVN atrioventricular node • specialised muscle fibres in septum which conduct el ...
... excitation over atria wall (pacemaker) SAN sinoatrial node • Patch of tissue at the base of atrium/top of septum of heart where wave of excitation is delayed and which conducts electrical excitation from atria to septum AVN atrioventricular node • specialised muscle fibres in septum which conduct el ...
Prognostic value of QRS fragmentation in patients with
... fragmentation in standard ECG as a diagnostic marker of arrhythmogenic right ventricular dysplasia-cardiomyopathy.Heart Rhythm. 2008 Oct;5(10):1417-21 ...
... fragmentation in standard ECG as a diagnostic marker of arrhythmogenic right ventricular dysplasia-cardiomyopathy.Heart Rhythm. 2008 Oct;5(10):1417-21 ...
Ventricular Assist Devices and Total Artificial Hearts
... Associated Clinical Documentation: It is critical that the list of information below is submitted for review to determine if the policy criteria are met. If any of these items are not submitted, it could impact our review and decision outcome: ...
... Associated Clinical Documentation: It is critical that the list of information below is submitted for review to determine if the policy criteria are met. If any of these items are not submitted, it could impact our review and decision outcome: ...
The Case of Rate Control:
... therapy, radiofrequency catheter ablation and/or surgical (Maze) ablation therapy at time of open heart surgery. Still requires rate slowing drugs. ...
... therapy, radiofrequency catheter ablation and/or surgical (Maze) ablation therapy at time of open heart surgery. Still requires rate slowing drugs. ...
(5)ANTI-ARRHYTHMICS
... Ganglion-blocking activity may cause vasodilation and hypotension but these effects are less pronounced than those of quinidine (because of no alpha blocking effect 2.) 1+2 →less ANS induced A/E Most troublesome adverse effect with long-term therapy is a lupus-like syndrome with NBME rash, art ...
... Ganglion-blocking activity may cause vasodilation and hypotension but these effects are less pronounced than those of quinidine (because of no alpha blocking effect 2.) 1+2 →less ANS induced A/E Most troublesome adverse effect with long-term therapy is a lupus-like syndrome with NBME rash, art ...
Cardiac Tamponade Avi Patel, M.D. August 1, 2005 Introduction The
... 2. Phase 2: As fluid accumulates, the pericardial pressure increases above the ventricular filling pressure, leading to reduction of cardiac output due to diminished diastolic filling of the ventricles. The increasing intrapericardial pressure cannot be overcome by the heart’s transmural distending ...
... 2. Phase 2: As fluid accumulates, the pericardial pressure increases above the ventricular filling pressure, leading to reduction of cardiac output due to diminished diastolic filling of the ventricles. The increasing intrapericardial pressure cannot be overcome by the heart’s transmural distending ...
Ventricular fibrillation
Ventricular fibrillation (V-fib or VF) is a condition in which there is uncoordinated contraction of the cardiac muscle of the ventricles in the heart, making them quiver rather than contract properly. Ventricular fibrillation is the most commonly identified arrhythmia in cardiac arrest patients. While there is some activity, the lay person is usually unable to detect it by palpating (feeling) the major pulse points of the carotid and femoral arteries. Such an arrhythmia is only confirmed by electrocardiography. Ventricular fibrillation is a medical emergency that requires prompt Advanced Life Support interventions. If this arrhythmia continues for more than a few seconds, it will likely degenerate further into asystole (""flatline""). This condition results in cardiogenic shock and cessation of effective blood circulation. As a consequence, sudden cardiac death (SCD) will result in a matter of minutes. If the patient is not revived after a sufficient period (within roughly 5 minutes at room temperature), the patient could sustain irreversible brain damage and possibly become brain-dead, due to the effects of cerebral hypoxia. On the other hand, death often occurs if sinus rhythm is not restored within 90 seconds of the onset of VF, especially if it has degenerated further into asystole.