Cardiac MRI in Left Ventricular Hypertrophy: From the Etiological
... - >90% of deaths occur during training or competition - Most frequent causes of sudden death: ...
... - >90% of deaths occur during training or competition - Most frequent causes of sudden death: ...
pacemaker basics
... rate timer and triggers an AV delay timer (SAV) • The SAV expires without being inhibited by an intrinsic ventricular event, resulting in a ventricular pace ...
... rate timer and triggers an AV delay timer (SAV) • The SAV expires without being inhibited by an intrinsic ventricular event, resulting in a ventricular pace ...
Determination of Right Ventricular Mass in Computed
... the RA due to its closer proximity to the injecting catheter, or any combination of these criteria. The separation of the RV outflow tract from the pulmonary artery was defined by the pulmonic valve plane that could usually be visualized. When it could not be clearly seen, we arbitrarily set a verti ...
... the RA due to its closer proximity to the injecting catheter, or any combination of these criteria. The separation of the RV outflow tract from the pulmonary artery was defined by the pulmonic valve plane that could usually be visualized. When it could not be clearly seen, we arbitrarily set a verti ...
Left ventricular dynamics during handgrip - Heart
... The effect of isometric exercise by handgrip on the ejection dynamics of the left ventricle, especially the relation between left ventricular stroke work index and end-diastolic pressure, was studied in 25 patients. In the patients with normal or nearly normal left hearts (group i), the response to ...
... The effect of isometric exercise by handgrip on the ejection dynamics of the left ventricle, especially the relation between left ventricular stroke work index and end-diastolic pressure, was studied in 25 patients. In the patients with normal or nearly normal left hearts (group i), the response to ...
The Morphogenesis of Transposition of the Great Vessels
... airtery, and the tissue. that in-vades an-d divides the A V canial into the miitral 11(1. ii,trsicusid orifices are both l)alrt of a conitinulouls fibroplastic tra('t that -inies tile inner concave sin face of the Pr1initfive cardiac- lube. It ha(,s been shownri hr careful measuremnentf at (01(11 st ...
... airtery, and the tissue. that in-vades an-d divides the A V canial into the miitral 11(1. ii,trsicusid orifices are both l)alrt of a conitinulouls fibroplastic tra('t that -inies tile inner concave sin face of the Pr1initfive cardiac- lube. It ha(,s been shownri hr careful measuremnentf at (01(11 st ...
Evolution of Paroxysmal Atrial Fibrillation to Persistent or Permanent
... Journal of Atrial Fibrillation modifying the atrial substrate.29-31 Hirayama et al have shown that ACE inhibitors are effective in preventing AF progression.32 In our study that mostly consisted of a Caucasian American population, ACE inhibitors/ARBs failed to show this effect. Our study also faile ...
... Journal of Atrial Fibrillation modifying the atrial substrate.29-31 Hirayama et al have shown that ACE inhibitors are effective in preventing AF progression.32 In our study that mostly consisted of a Caucasian American population, ACE inhibitors/ARBs failed to show this effect. Our study also faile ...
BASIC ECG INTERPRETATION
... Heart muscle unlike other muscle can contract without a an external nerve input or action potential. The interesting thing about cardiac muscle is: it can depolarize as the result of adjacent cells depolarizing. Like a wave ...
... Heart muscle unlike other muscle can contract without a an external nerve input or action potential. The interesting thing about cardiac muscle is: it can depolarize as the result of adjacent cells depolarizing. Like a wave ...
Cardioverter defibrillator therapy in the primary and secondary
... and LVEF ≤ 36% (10). In those patients, ICD therapy reduced both the risk of sudden cardiac death and of all-cause death. However, due to a low event rate the latter effect closely missed statistical significance (10). The SCD-HeFT trial had a principally different design: It included patients with ...
... and LVEF ≤ 36% (10). In those patients, ICD therapy reduced both the risk of sudden cardiac death and of all-cause death. However, due to a low event rate the latter effect closely missed statistical significance (10). The SCD-HeFT trial had a principally different design: It included patients with ...
Long-term Use of Anti-inflammatory Drugs and Risk of Atrial Fibrillation
... population1 but more than 6% of individuals older than 80 years.2-4 The prevalence of AF is increasing,5 even after adjustment for age.6,7 Atrial fibrillation reduces life expectancy.8,9 The most frequent pathoanatomical changes in AF are atrial fibrosis and loss of atrial muscle mass. Histological ...
... population1 but more than 6% of individuals older than 80 years.2-4 The prevalence of AF is increasing,5 even after adjustment for age.6,7 Atrial fibrillation reduces life expectancy.8,9 The most frequent pathoanatomical changes in AF are atrial fibrosis and loss of atrial muscle mass. Histological ...
Those features are 1. Respiratory variation in ventricular filling 2
... myocardial relaxation. The early diastolic mitral annular velocity (e’) which reflects the status of LV myocardial relaxation is reduced in most forms of heart failure related to myocardial disease, including restrictive cardiomyopathy. The normal e’ velocity from the medial mitral annulus is 9 cm/s ...
... myocardial relaxation. The early diastolic mitral annular velocity (e’) which reflects the status of LV myocardial relaxation is reduced in most forms of heart failure related to myocardial disease, including restrictive cardiomyopathy. The normal e’ velocity from the medial mitral annulus is 9 cm/s ...
Effects of physical exercises on the ventricular myocardium
... adult myocardium consists of around 80% of myocytes and 20% of cellular matrix, which contains conjunctive tissue and blood vessels, among others. These proportions are different in distinct development stages and present an increased relative myocyte volume in the first years of life. In other case ...
... adult myocardium consists of around 80% of myocytes and 20% of cellular matrix, which contains conjunctive tissue and blood vessels, among others. These proportions are different in distinct development stages and present an increased relative myocyte volume in the first years of life. In other case ...
Uncertainty in Patients Newly Diagnosed with Atrial Fibrillation
... in clinical practice. In contrast to its high prevalence and the associated high number of hospital admissions, there is a paucity of published studies that have evaluated the perspective of patients with atrial fibrillation or patients’perceptions or responses to diagnosis, treatment, or prognosis ...
... in clinical practice. In contrast to its high prevalence and the associated high number of hospital admissions, there is a paucity of published studies that have evaluated the perspective of patients with atrial fibrillation or patients’perceptions or responses to diagnosis, treatment, or prognosis ...
Structural and functional changes in maternal left ventricle during
... identification and understanding maternal cardiac structure and function is of clinical importance and is essential for the management of cardiology patients in pregnancy. Despite many reports on maternal cardiac adaption being published, there is controversy about the change in left ventricular (LV ...
... identification and understanding maternal cardiac structure and function is of clinical importance and is essential for the management of cardiology patients in pregnancy. Despite many reports on maternal cardiac adaption being published, there is controversy about the change in left ventricular (LV ...
ATP-Sensitive Potassium Channel Blocker HMR 1883 Reduces
... well tolerated, devoid of an insulin-releasing and vasoconstrictor effect at antifibrillatory doses, and does not inhibit the mitochondrial KATP channel (T. Sato, N. Sasaki, J. Seharaseyon, B. O’Rourke, E. Marbán, unpublished observations; Linz et al., 1998b) in contrast to the sarcolemmal KATP cha ...
... well tolerated, devoid of an insulin-releasing and vasoconstrictor effect at antifibrillatory doses, and does not inhibit the mitochondrial KATP channel (T. Sato, N. Sasaki, J. Seharaseyon, B. O’Rourke, E. Marbán, unpublished observations; Linz et al., 1998b) in contrast to the sarcolemmal KATP cha ...
Diminished stroke volume during inspiration
... left and right ventricles and pleural space. Airtight introducer connectors prevented ventricular hemorrhage and pneumothorax. The aortic flow probes were coupled to a sine-wave flowmeter (Statham, M4001, Los Angeles). The performance characteristics of these instruments have been described previous ...
... left and right ventricles and pleural space. Airtight introducer connectors prevented ventricular hemorrhage and pneumothorax. The aortic flow probes were coupled to a sine-wave flowmeter (Statham, M4001, Los Angeles). The performance characteristics of these instruments have been described previous ...
A comparative study of contractility of the heart ventricle in some
... To obtain apexcardiographic recordings, a tensometric pulse wave transducer (Neurosoft, Russia) (frequency range, 0.3 to 200 Hz; sensitivity, 100 mV/Pa; and time constant, 0.6 s) was fixed near the heart ventricle. The position of the transducer was adjusted to the apex of the heart ventricle and wa ...
... To obtain apexcardiographic recordings, a tensometric pulse wave transducer (Neurosoft, Russia) (frequency range, 0.3 to 200 Hz; sensitivity, 100 mV/Pa; and time constant, 0.6 s) was fixed near the heart ventricle. The position of the transducer was adjusted to the apex of the heart ventricle and wa ...
Rapid Ventricular Transvenous Pacing via Pulmonary Artery
... Abstract: Deliberate hypotension facilitates precise deployment of endovascular stent grafting in the thoracic aorta. We describe a practical technique using pulmonary artery catheter (PAC) guided transvenous rapid ventricular pacing via transjugular approach and delineate pertinent anesthetic consi ...
... Abstract: Deliberate hypotension facilitates precise deployment of endovascular stent grafting in the thoracic aorta. We describe a practical technique using pulmonary artery catheter (PAC) guided transvenous rapid ventricular pacing via transjugular approach and delineate pertinent anesthetic consi ...
left atrial size
... The Mechanical obstruction to flow across the mitral valve results in increased left atrial pressure with a rise in left atrial tension and myocardial oxygen consumption and the enlargement of the atrium is a manifestation of its failure .The increase in wall tension, combined with myocardial cellul ...
... The Mechanical obstruction to flow across the mitral valve results in increased left atrial pressure with a rise in left atrial tension and myocardial oxygen consumption and the enlargement of the atrium is a manifestation of its failure .The increase in wall tension, combined with myocardial cellul ...
Giant Molecule Titin and Myocardial Stiffness
... stiffness of the ventricle and the myocardium are thought to be mediated largely by alterations in the collagenous matrix that surrounds the cardiomyocyte. Wu et al1 suggest that the large intrasarcomeric protein titin also plays a role in determining ventricular stiffness. It should be emphasized, ...
... stiffness of the ventricle and the myocardium are thought to be mediated largely by alterations in the collagenous matrix that surrounds the cardiomyocyte. Wu et al1 suggest that the large intrasarcomeric protein titin also plays a role in determining ventricular stiffness. It should be emphasized, ...
Giant Molecule Titin and Myocardial Stiffness
... a variety of fields, including diastolic stiffness, nutrition, impulse propagation, arrhythmia, and dilatation resulting finally in depressed systolic function. It is important to note that quantitative changes in collagen expression are usually accompanied by a switch in collagen type and arrangeme ...
... a variety of fields, including diastolic stiffness, nutrition, impulse propagation, arrhythmia, and dilatation resulting finally in depressed systolic function. It is important to note that quantitative changes in collagen expression are usually accompanied by a switch in collagen type and arrangeme ...
Sudden cardiac death in the young: causes and prevention
... No structural abnormalities can be identified at autopsy in 10-30% of sudden deaths in previously healthy children and adolescents.4,10 The finding of a morphologically normal heart at post-mortem therefore suggests an ion channelopathy, such as LQTS, Brugada syndrome, and CPVT. LQTS comprises a dis ...
... No structural abnormalities can be identified at autopsy in 10-30% of sudden deaths in previously healthy children and adolescents.4,10 The finding of a morphologically normal heart at post-mortem therefore suggests an ion channelopathy, such as LQTS, Brugada syndrome, and CPVT. LQTS comprises a dis ...
Cardiomyopathy, Myocarditis and Pericardial Disease
... 3rd most common form of heart disease in U.S. 2nd most common cause of adolescent sudden death(IHSS or HOCM) Directly affects cardiac structure and impairs myocardial function ...
... 3rd most common form of heart disease in U.S. 2nd most common cause of adolescent sudden death(IHSS or HOCM) Directly affects cardiac structure and impairs myocardial function ...
Review - American Physiological Society
... adiposity adversely affects the heart. Conventional wisdom suggests that either hemodynamic (that is, increased cardiac output and hypertension) or metabolic (that is, dyslipidemic) derangements associated with obesity may predispose individuals to coronary artery disease and heart failure. The purp ...
... adiposity adversely affects the heart. Conventional wisdom suggests that either hemodynamic (that is, increased cardiac output and hypertension) or metabolic (that is, dyslipidemic) derangements associated with obesity may predispose individuals to coronary artery disease and heart failure. The purp ...
experiments on the origin of auricular flutter and fibrillation
... strophanthin, or by ligation of a coronary artery. Under these conditions, however, the tachycardia usually is not as regular as the clinical tachycardias; all too often ventricular: extrasystoles and ventricular fibrillation appear. To study the abnormal stimulus formation, for the last eight years ...
... strophanthin, or by ligation of a coronary artery. Under these conditions, however, the tachycardia usually is not as regular as the clinical tachycardias; all too often ventricular: extrasystoles and ventricular fibrillation appear. To study the abnormal stimulus formation, for the last eight years ...
Two-dimensional echocardiography in cardiac tamponade
... observed in long-axis as well as short-axis views: the posterior pericardial space decreased in width in systole and abruptly increased in width in diastole (Fig. I). In diastole, the left ventricular posterior wall moved abruptly anteriorly; concomitantly the left ventricular dimension decreased. A ...
... observed in long-axis as well as short-axis views: the posterior pericardial space decreased in width in systole and abruptly increased in width in diastole (Fig. I). In diastole, the left ventricular posterior wall moved abruptly anteriorly; concomitantly the left ventricular dimension decreased. A ...
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.