Left Anterior Fascicular Block (LAFB)-KH
... In a sense, the term "ST segment" is a misnomer, because a discrete ST segment distinct from the T wave is usually absent. More often the ST-T wave is a smooth, continuous waveform beginning with the J-point (end of QRS), slowly rising to the peak of the T and followed by a rapid descent to the isoe ...
... In a sense, the term "ST segment" is a misnomer, because a discrete ST segment distinct from the T wave is usually absent. More often the ST-T wave is a smooth, continuous waveform beginning with the J-point (end of QRS), slowly rising to the peak of the T and followed by a rapid descent to the isoe ...
Electrocardiography of arrhythmias: From deductive analysis
... basic rhythm is atria l tachycardia with Wen ckebach (type I) atrioventricular (AY) block . The long cycles of the Wenckebach sequence are followed by one or more con secuti ve QRS complexes with right bundl e branch block . The mechanism proposed to explain the aberrancy of the first QRS co mplex i ...
... basic rhythm is atria l tachycardia with Wen ckebach (type I) atrioventricular (AY) block . The long cycles of the Wenckebach sequence are followed by one or more con secuti ve QRS complexes with right bundl e branch block . The mechanism proposed to explain the aberrancy of the first QRS co mplex i ...
Cardiogenic shock
... led to expansion of the CS paradigm (11). Wide variations in left ventricular ejection fraction, left ventricular size, and systemic vascular resistance in patients with CS suggest that pathophysiologic mechanisms of CS may vary among patients. About one fifth of patients with CS complicating myocard ...
... led to expansion of the CS paradigm (11). Wide variations in left ventricular ejection fraction, left ventricular size, and systemic vascular resistance in patients with CS suggest that pathophysiologic mechanisms of CS may vary among patients. About one fifth of patients with CS complicating myocard ...
Pulmonary regurgitation in congenital heart disease
... right ventricular dilatation. This is a slow insidious process and in congenital pulmonary regurgitation symptoms developed in 6 % at 20 years and 20 % by 40 years (1). Indeed Ehrenhaft stated that his objections to transannular patches in the repair of Tetralogy arose from his experience of perform ...
... right ventricular dilatation. This is a slow insidious process and in congenital pulmonary regurgitation symptoms developed in 6 % at 20 years and 20 % by 40 years (1). Indeed Ehrenhaft stated that his objections to transannular patches in the repair of Tetralogy arose from his experience of perform ...
Randomized Trial Amiodarone for the Prevention of Atrial Fibrillation
... associated with high daily dosages and long-term therapy14,15 but does not increase mortality in patients with heart failure and ischemic heart disease.16,17 Efforts to reduce the adverse event rate by using low-dose amiodarone (ⱕ400 mg/d after adequate loading) suggest that they still may occur. Sh ...
... associated with high daily dosages and long-term therapy14,15 but does not increase mortality in patients with heart failure and ischemic heart disease.16,17 Efforts to reduce the adverse event rate by using low-dose amiodarone (ⱕ400 mg/d after adequate loading) suggest that they still may occur. Sh ...
AHA/ACCF/ESC Scientific Statement
... J, Starling RC, Towbin J, Virmani R. The role of endomyocardial biopsy in the management of cardiovascular disease: a scientific statement from the American Heart Association, the American College of Cardiology, and the European Society of Cardiology. Circulation. 2007;116:2216 –2233. This article h ...
... J, Starling RC, Towbin J, Virmani R. The role of endomyocardial biopsy in the management of cardiovascular disease: a scientific statement from the American Heart Association, the American College of Cardiology, and the European Society of Cardiology. Circulation. 2007;116:2216 –2233. This article h ...
Cardiogenic Shock
... D. Diagnostic Studies While further diagnostic studies are important in clarifying the diagnosis, it must be emphasized that rapid, definitive therapy should not be delayed once the diagnosis is apparent. In general, patients with cardiogenic shock and suspected acute MI should proceed to cardiac ca ...
... D. Diagnostic Studies While further diagnostic studies are important in clarifying the diagnosis, it must be emphasized that rapid, definitive therapy should not be delayed once the diagnosis is apparent. In general, patients with cardiogenic shock and suspected acute MI should proceed to cardiac ca ...
Percutaneous closure of a post-traumatic ventricular septal defect
... device became trapped during placement of the occluder because the right plate had an inappropriate configuration. The device was retrieved. A PDA Occluder was selected to close the defect. The device’s size was similar to that of the VSD or ASD Occluder, judged by the maximum diameter viewed by ech ...
... device became trapped during placement of the occluder because the right plate had an inappropriate configuration. The device was retrieved. A PDA Occluder was selected to close the defect. The device’s size was similar to that of the VSD or ASD Occluder, judged by the maximum diameter viewed by ech ...
Effects of endothelin-1 on calcium and potassium currents in
... cardiac membranes [8, 26] and increasing evidence suggests that ET-1 may be an important factor in cardiovascular regulation under physiological [7, 11, 17, 26] and various pathological [1, 24, 25, 32, 33] conditions. There is controversy about the effects of ET-1 on cardiac cells, and they strongly ...
... cardiac membranes [8, 26] and increasing evidence suggests that ET-1 may be an important factor in cardiovascular regulation under physiological [7, 11, 17, 26] and various pathological [1, 24, 25, 32, 33] conditions. There is controversy about the effects of ET-1 on cardiac cells, and they strongly ...
Regional ventricular wall thickening reflects changes in cardiac fiber
... organization of the myocytes may provide a structural basis for systolic wall thickening. However, the destructive nature of conventional histological analysis employed in such meticulous studies complicates direct evaluation of any changes in myocardial fiber and sheet structure that accompany card ...
... organization of the myocytes may provide a structural basis for systolic wall thickening. However, the destructive nature of conventional histological analysis employed in such meticulous studies complicates direct evaluation of any changes in myocardial fiber and sheet structure that accompany card ...
Left ventricular ejection fraction after acute coronary occlusion in
... global and regional ejection fraction was used in the analysis. The left ventricular region manifesting the maximum change in regional ejection fraction after acute coronary occlusion was identified for each dog.6 The absolute acute decrease in ejection fraction was divided by the control value, and ...
... global and regional ejection fraction was used in the analysis. The left ventricular region manifesting the maximum change in regional ejection fraction after acute coronary occlusion was identified for each dog.6 The absolute acute decrease in ejection fraction was divided by the control value, and ...
Regional ventricular wall thickening reflects changes in - AJP
... organization of the myocytes may provide a structural basis for systolic wall thickening. However, the destructive nature of conventional histological analysis employed in such meticulous studies complicates direct evaluation of any changes in myocardial fiber and sheet structure that accompany card ...
... organization of the myocytes may provide a structural basis for systolic wall thickening. However, the destructive nature of conventional histological analysis employed in such meticulous studies complicates direct evaluation of any changes in myocardial fiber and sheet structure that accompany card ...
Clinical recommendations of cardiac magnetic resonance, Part II
... myocarditis, can lead to false negative results for myocardial edema.6 Hyperemia identification, as proposed by Lake Louise criteria, is very challenging and poorly used in the clinical setting. Recently, postcontrast cine steadystate free precession (SSFP) sequences were proposed as a new method fo ...
... myocarditis, can lead to false negative results for myocardial edema.6 Hyperemia identification, as proposed by Lake Louise criteria, is very challenging and poorly used in the clinical setting. Recently, postcontrast cine steadystate free precession (SSFP) sequences were proposed as a new method fo ...
Atrial fibrillation and risks of cardiovascular disease, renal
... Atrial fibrillation is a leading cause of morbidity and mortality, with an estimated five million incident cases globally.1 It is increasing in prevalence in both developing and developed countries and is associated with an increased risk of all cause mortality and stroke, as well as higher medical ...
... Atrial fibrillation is a leading cause of morbidity and mortality, with an estimated five million incident cases globally.1 It is increasing in prevalence in both developing and developed countries and is associated with an increased risk of all cause mortality and stroke, as well as higher medical ...
Total Artificial Hearts And Implantable Ventricular Assist Devices
... refer to FEP Medical Policy Manual MP-7.03.11, Total Artificial Hearts and Implantable Ventricular Assist Devices. The FEP Medical Policy Manual can be found at: www.fepblue.org. ** Regarding artificial hearts - implants of artificial organs including those implanted as a bridge to transplant and/or ...
... refer to FEP Medical Policy Manual MP-7.03.11, Total Artificial Hearts and Implantable Ventricular Assist Devices. The FEP Medical Policy Manual can be found at: www.fepblue.org. ** Regarding artificial hearts - implants of artificial organs including those implanted as a bridge to transplant and/or ...
Role of PET/ CT for the Identification of Cardiac Sarcoid Disease
... metabolism imaging for the detection of cardiac sarcoid involvement. Normal perfusion and metabolism（category ...
... metabolism imaging for the detection of cardiac sarcoid involvement. Normal perfusion and metabolism（category ...
Device-Based Therapy of Cardiac Rhythm Abnormalities
... use of heart rhythm devices (pacemakers for bradyarrhythmias and heart failure management, e.g., cardiac resynchronization, and implantable cardioverter-defibrillators [ICDs]), not the treatment of cardiac arrhythmias. The fact that the use of a device for treatment of a particular condition is list ...
... use of heart rhythm devices (pacemakers for bradyarrhythmias and heart failure management, e.g., cardiac resynchronization, and implantable cardioverter-defibrillators [ICDs]), not the treatment of cardiac arrhythmias. The fact that the use of a device for treatment of a particular condition is list ...
Atorvastatin inhibits cardiac hypertrophy of rats in vitro and in vivo
... the role of atorvastatin in suppression of cardiac hypertrophy is potentially associated with the change of peroxisome proliferator-activated receptor γ (PPARγ) expression, and the anti-inflammatory effect in vitro and in vivo. Method. Cardiac hypertrophy was established by angiotensin II in neonata ...
... the role of atorvastatin in suppression of cardiac hypertrophy is potentially associated with the change of peroxisome proliferator-activated receptor γ (PPARγ) expression, and the anti-inflammatory effect in vitro and in vivo. Method. Cardiac hypertrophy was established by angiotensin II in neonata ...
Assessment of the Right Ventricle by Echocardiography: A Primer for
... the left ventricle. This is due primarily to lower afterload in the pulmonary vascular bed, which explains the lower RV pressures compared with the left ventricle. An important principle regarding RV diastolic filling is ventricular interdependence, whereby changes in pulmonary vascular resistance ( ...
... the left ventricle. This is due primarily to lower afterload in the pulmonary vascular bed, which explains the lower RV pressures compared with the left ventricle. An important principle regarding RV diastolic filling is ventricular interdependence, whereby changes in pulmonary vascular resistance ( ...
Clinical significance of positive inotropic action of - Heart
... a sensitive method of assessing changes in left ventricular function, reflecting the forces causing ejection of blood into the aorta (Gibson et al., I970). It is relatively unaffected by tachycardia induced by atropine administration, ventricular pacing, or changes in posture, while it is consistent ...
... a sensitive method of assessing changes in left ventricular function, reflecting the forces causing ejection of blood into the aorta (Gibson et al., I970). It is relatively unaffected by tachycardia induced by atropine administration, ventricular pacing, or changes in posture, while it is consistent ...
Effects of obstructive sleep apnoea on heart rhythm REVIEW
... airways producing considerable negative intrathoracic pressure, which may be as low as -80 mmHg. This mechanism, repeated during each apnoeic phase, may stretch the cardiac wall and intrathoracic vessels possibly leading to both shortterm electrical and long-term mechanical remodelling of both atria ...
... airways producing considerable negative intrathoracic pressure, which may be as low as -80 mmHg. This mechanism, repeated during each apnoeic phase, may stretch the cardiac wall and intrathoracic vessels possibly leading to both shortterm electrical and long-term mechanical remodelling of both atria ...
The DAVID (Dual Chamber and VVI Implantable Defibrillator) II Trial
... The DAVID (Dual Chamber and VVI Implantable Defibrillator) trial demonstrated that dual chamber rate responsive pacing as compared with ventricular backup-only pacing worsens the combined end point of mortality and heart failure hospitalization. Although altered ventricular activation from right ven ...
... The DAVID (Dual Chamber and VVI Implantable Defibrillator) trial demonstrated that dual chamber rate responsive pacing as compared with ventricular backup-only pacing worsens the combined end point of mortality and heart failure hospitalization. Although altered ventricular activation from right ven ...
The Influence of Cardiac Trabeculae on Ventricular
... the ventricular wall. The myocardium is composed for about the 70% of its volume by parallel cardiac muscle cells, or myocytes, having a diameter which varies between 10 and 20 μm and a length that ranges between 80 and 100 μm. The fundamental contractile unit in the cardiomyocytes is the sarcomere, ...
... the ventricular wall. The myocardium is composed for about the 70% of its volume by parallel cardiac muscle cells, or myocytes, having a diameter which varies between 10 and 20 μm and a length that ranges between 80 and 100 μm. The fundamental contractile unit in the cardiomyocytes is the sarcomere, ...
Compression of interventricular septum during right - AJP
... single LV and in combined RV-LV models. The myocardium was assumed to be isotropic, homogeneous, and linearly elastic. During diastole, the LV had the largest stresses at the endocardial surface and, in the combined RV-LV model, there was a large stress concentration at the septum-RV junction. Compr ...
... single LV and in combined RV-LV models. The myocardium was assumed to be isotropic, homogeneous, and linearly elastic. During diastole, the LV had the largest stresses at the endocardial surface and, in the combined RV-LV model, there was a large stress concentration at the septum-RV junction. Compr ...
left axis deviation
... U wave: origin for this wave is not clear - but probably represents "afterdepolarizations" in the ventricles PR interval: time interval from onset of atrial depolarization (P wave) to onset of ventricular depolarization (QRS complex) QRS duration: duration of ventricular muscle depolarization QT int ...
... U wave: origin for this wave is not clear - but probably represents "afterdepolarizations" in the ventricles PR interval: time interval from onset of atrial depolarization (P wave) to onset of ventricular depolarization (QRS complex) QRS duration: duration of ventricular muscle depolarization QT int ...
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.