Premature Ventricular Contractions
... The follow-up beat after a VPC is stronger due to the post-extra systolic compensatory pause, allowing greater left ventricular (LV) filling, causing greater intensity of that beat. Conversely, the VPC itself may be underperfused and consequently not perceived by radial pulse, resulting in a spu ...
... The follow-up beat after a VPC is stronger due to the post-extra systolic compensatory pause, allowing greater left ventricular (LV) filling, causing greater intensity of that beat. Conversely, the VPC itself may be underperfused and consequently not perceived by radial pulse, resulting in a spu ...
Lethal Arrhythmias
... decisions necessary to save your patient's life? Although patients with known cardiac disease suffer the greatest number of lethal arrhythmias, arrhythmias may occur with any patient on any floor at any time. Not all the arrhythmias discussed in this module are lethal. It is the heart’s response to ...
... decisions necessary to save your patient's life? Although patients with known cardiac disease suffer the greatest number of lethal arrhythmias, arrhythmias may occur with any patient on any floor at any time. Not all the arrhythmias discussed in this module are lethal. It is the heart’s response to ...
Echocardiographic Measurement of Right Ventricular Wall Thickness
... endocardium and the effusion fluid separated the epicardium from the pericardium throughout the whole cardiac phase. The epicardium was visualized as a smooth echo in figure 7A although it appeared as rough, multiple echoes in some places in figure 7B. This is possibly due to the attachment of infla ...
... endocardium and the effusion fluid separated the epicardium from the pericardium throughout the whole cardiac phase. The epicardium was visualized as a smooth echo in figure 7A although it appeared as rough, multiple echoes in some places in figure 7B. This is possibly due to the attachment of infla ...
Targeted ablation of cardiac sympathetic neurons - AJP
... stain. TTC staining differentiates viable tissue by reacting with myocardial dehydrogenase enzymes to form a red brick stain. Necrotic tissue, which has lost its dehydrogenase enzymes, does not form a red stain and shows up as pale yellow. This stain has been shown to be a reliable indicator of myoc ...
... stain. TTC staining differentiates viable tissue by reacting with myocardial dehydrogenase enzymes to form a red brick stain. Necrotic tissue, which has lost its dehydrogenase enzymes, does not form a red stain and shows up as pale yellow. This stain has been shown to be a reliable indicator of myoc ...
91410 - Priority Health
... ventricular fibrillation, and a small percentage of sudden infant death syndrome. Approximately five (5) million people in the United States have heart failure and over 550,000 are diagnosed annually for the first time. Heart failure is the primary reason for 12 to 15 million-office visits each year ...
... ventricular fibrillation, and a small percentage of sudden infant death syndrome. Approximately five (5) million people in the United States have heart failure and over 550,000 are diagnosed annually for the first time. Heart failure is the primary reason for 12 to 15 million-office visits each year ...
motion mode echocardiography on healthy male
... Kealy et al. 2011). It uses frequencies greater than 20.000 cycles/second (Hz). The transmission velocity of ultrasound waves in blood and most soft tissues cells is uniform at 1540 m/sec (Coatney 2001). Common ultrasound frequencies used in cats are between 2 and 15 MHz (Chandler et al. 2004; Schob ...
... Kealy et al. 2011). It uses frequencies greater than 20.000 cycles/second (Hz). The transmission velocity of ultrasound waves in blood and most soft tissues cells is uniform at 1540 m/sec (Coatney 2001). Common ultrasound frequencies used in cats are between 2 and 15 MHz (Chandler et al. 2004; Schob ...
Modeling Cardiac Ventricular Activation
... scarce [Durrer et al., 1979]. We may even have access to high-quality recorded data on the endocardial and epicardial potentials during cardiac activation [Gepstein et al., 1997], but we are left to guess how exactly the propagation through the myocardium takes place. However, a ventricular model th ...
... scarce [Durrer et al., 1979]. We may even have access to high-quality recorded data on the endocardial and epicardial potentials during cardiac activation [Gepstein et al., 1997], but we are left to guess how exactly the propagation through the myocardium takes place. However, a ventricular model th ...
PDF - Circulation: Arrhythmia and Electrophysiology
... Early Postinfarct PVS The role of PVS in risk stratification in the remote infarct setting has previously demonstrated benefit.2,20 Inducible VT at 9 to 21 days postinfarct was associated with an increased risk of SCD or spontaneous VA, and noninducibility conversely was associated with a lower mort ...
... Early Postinfarct PVS The role of PVS in risk stratification in the remote infarct setting has previously demonstrated benefit.2,20 Inducible VT at 9 to 21 days postinfarct was associated with an increased risk of SCD or spontaneous VA, and noninducibility conversely was associated with a lower mort ...
Imaging to improve the results of cardiac resynchronization therapy
... 6‑min walk test, among others) compared with studies that used objective parameters of left ventricular (LV) remodeling. Thus, in the latter ...
... 6‑min walk test, among others) compared with studies that used objective parameters of left ventricular (LV) remodeling. Thus, in the latter ...
Acute right ventricular failure–– from pathophysiology to new
... Right ventricular failure has a similar incidence to left-sided heart failure, with each affecting about 1 in 20 of the population [3]. Left-sided heart failure is often a chronic, progressive disease with mortality four to eight times greater than that of the age-matched general population [4]. In ...
... Right ventricular failure has a similar incidence to left-sided heart failure, with each affecting about 1 in 20 of the population [3]. Left-sided heart failure is often a chronic, progressive disease with mortality four to eight times greater than that of the age-matched general population [4]. In ...
Acute right ventricular failure—from pathophysiology to new
... Right ventricular failure has a similar incidence to left-sided heart failure, with each affecting about 1 in 20 of the population [3]. Left-sided heart failure is often a chronic, progressive disease with mortality four to eight times greater than that of the age-matched general population [4]. In ...
... Right ventricular failure has a similar incidence to left-sided heart failure, with each affecting about 1 in 20 of the population [3]. Left-sided heart failure is often a chronic, progressive disease with mortality four to eight times greater than that of the age-matched general population [4]. In ...
Palpitations - Australian Doctor
... Sinus rhythm may be experienced as palpitations when the rate is excessive for the level of exertion at the time it occurs. Sinus rhythm is usually experienced as palpitations with gradual onset and offset. Patients most commonly complain of symptoms occurring at rest, sitting or lying or with prolo ...
... Sinus rhythm may be experienced as palpitations when the rate is excessive for the level of exertion at the time it occurs. Sinus rhythm is usually experienced as palpitations with gradual onset and offset. Patients most commonly complain of symptoms occurring at rest, sitting or lying or with prolo ...
Common RyR2 variants associate with ventricular arrhythmias and
... investigated whether potentially functional variants of genes encoding RyR2 (ryanodine receptor 2) and the L-type Ca2+ channel are related to the risk of ventricular arrhythmias and sudden cardiac death in CHF (chronic heart failure) in a case-control study. We found that the A allele of rs3766871 i ...
... investigated whether potentially functional variants of genes encoding RyR2 (ryanodine receptor 2) and the L-type Ca2+ channel are related to the risk of ventricular arrhythmias and sudden cardiac death in CHF (chronic heart failure) in a case-control study. We found that the A allele of rs3766871 i ...
ECG interpretations
... Etiology: There is complete block of conduction in the AV junction, so the atria and ventricles form impulses independently of each other. Without impulses from the atria, the ventricles own intrinsic pacemaker kicks in at around 30 - 45 beats/minute. ...
... Etiology: There is complete block of conduction in the AV junction, so the atria and ventricles form impulses independently of each other. Without impulses from the atria, the ventricles own intrinsic pacemaker kicks in at around 30 - 45 beats/minute. ...
during fetal life - Journal of Clinical Pathology
... the free wall and half the septum became heavier than the left after 28 weeks' gestation. In the present series, doubtless due to the different method, the right ventricle did not become heavier, but there was a relative increase in the rate of growth of the right ventricle during later fetal life. ...
... the free wall and half the septum became heavier than the left after 28 weeks' gestation. In the present series, doubtless due to the different method, the right ventricle did not become heavier, but there was a relative increase in the rate of growth of the right ventricle during later fetal life. ...
Percutaneous coronary stenting in patients with left ventricular
... cardiovascular events (MACE), defined as the composite of death, non-fatal myocardial infarction (either Q-wave or non-Q-wave), or repeat target vessel revascularisation (TVR), at the longest follow-up available (with ≥90% completion). Secondary endpoints included ...
... cardiovascular events (MACE), defined as the composite of death, non-fatal myocardial infarction (either Q-wave or non-Q-wave), or repeat target vessel revascularisation (TVR), at the longest follow-up available (with ≥90% completion). Secondary endpoints included ...
65 ECHOCARDIOGRAPHIC CHARACTERISTIC OF LEFT
... Cardiac adaptation to long-term physical load has been described as a physiological phenomenom (10, 22, 26). On the other hand, moderate left ventricular hypertrophy may be confused with pathological disorders such as hypertrophic or dilated cardiomyopathy (22, 26, 29). The data regarding impact of ...
... Cardiac adaptation to long-term physical load has been described as a physiological phenomenom (10, 22, 26). On the other hand, moderate left ventricular hypertrophy may be confused with pathological disorders such as hypertrophic or dilated cardiomyopathy (22, 26, 29). The data regarding impact of ...
Electrocardiography_II_Student
... the atria are weak and often of opposite polarity, which results in either no P-waves or a high frequency, low-voltage wavy ECG recording. The QRS-T complexes are normal but irregular as a result of impulses arriving at the AV node irregularly. Heart failure and valvular heart disease are both assoc ...
... the atria are weak and often of opposite polarity, which results in either no P-waves or a high frequency, low-voltage wavy ECG recording. The QRS-T complexes are normal but irregular as a result of impulses arriving at the AV node irregularly. Heart failure and valvular heart disease are both assoc ...
the current role of echocardiography in cardiac resynchronization
... Response to CRT is affected by multiple of mechanical dyssynchrony had a much factors including location and extent of lower response rate to CRT and less favoramyocardial scar, LV lead position, right ble clinical outcomes [14-16]. This imporventricular function and in addition to lack tant observa ...
... Response to CRT is affected by multiple of mechanical dyssynchrony had a much factors including location and extent of lower response rate to CRT and less favoramyocardial scar, LV lead position, right ble clinical outcomes [14-16]. This imporventricular function and in addition to lack tant observa ...
Increases Left-to-Right Ventricular Systolic Interaction
... in the free walls, and the pericardium. It is useful to further subdivide anatomic mechanical interactions into those occurring during diastole and systole. Systolic ventricular interaction is especially important as a determinant of right heart function since it is known that a substantial portion ...
... in the free walls, and the pericardium. It is useful to further subdivide anatomic mechanical interactions into those occurring during diastole and systole. Systolic ventricular interaction is especially important as a determinant of right heart function since it is known that a substantial portion ...
Thioredoxin Catalysis and Inflammasome Regulation
... With each “normal” heartbeat (sinus rhythm), an electrical signal arising from the sinus node spreads to the right and left atria, and therefore, causes atrial depolarization. Then, the electrical impulse spreads through the atrioventricular node and further initiates ventricular depolarization. As ...
... With each “normal” heartbeat (sinus rhythm), an electrical signal arising from the sinus node spreads to the right and left atria, and therefore, causes atrial depolarization. Then, the electrical impulse spreads through the atrioventricular node and further initiates ventricular depolarization. As ...
Cardiovascular Features of Heart Failure With Preserved Ejection
... Manuscript received January 18, 2006; revised manuscript received August 8, 2006, accepted August 14, 2006. ...
... Manuscript received January 18, 2006; revised manuscript received August 8, 2006, accepted August 14, 2006. ...
Task force I: Congenital heart disease
... defects have been considered. These defects include ob• structive valve lesions of the right and left heart, left to right shunts and right to left shunts including those with pulmonary hypertension and those with pulmonary stenosis or atresia. In general, when a patient has more than one cardiac an ...
... defects have been considered. These defects include ob• structive valve lesions of the right and left heart, left to right shunts and right to left shunts including those with pulmonary hypertension and those with pulmonary stenosis or atresia. In general, when a patient has more than one cardiac an ...
Atrioventricular dissociation with accrochage - Heart
... Fletcher and Morton, I968). There is, however, a third mechanism less well documented in the English published reports, which links together atrial and ventricular systole in atrioventricular dissociation so that the P waves and QRS complexes synchronize with each other or almost so. It appears to d ...
... Fletcher and Morton, I968). There is, however, a third mechanism less well documented in the English published reports, which links together atrial and ventricular systole in atrioventricular dissociation so that the P waves and QRS complexes synchronize with each other or almost so. It appears to d ...
PDF - Circulation: Arrhythmia and Electrophysiology
... this case. However, it will not be concealed unless it captures the right bundle only. Response to entrainment pacing from His catheter. Entrainment pacing from the His catheter should have had a long PPI–TCL, and manifest fusion as the pacing stimulus has to engage the right bundle apically before ...
... this case. However, it will not be concealed unless it captures the right bundle only. Response to entrainment pacing from His catheter. Entrainment pacing from the His catheter should have had a long PPI–TCL, and manifest fusion as the pacing stimulus has to engage the right bundle apically before ...
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.