Dispersion of Ventricular Depolarization-Repolarization
... No patients were on antiarrhythmic drugs or other drugs known to affect the QRS complex and/or the QT interval during or before acquisition of the ECG tracings analyzed in the present study. All patients were in sinus rhythm. The 12-lead ECGs were obtained in the traditional lead position and record ...
... No patients were on antiarrhythmic drugs or other drugs known to affect the QRS complex and/or the QT interval during or before acquisition of the ECG tracings analyzed in the present study. All patients were in sinus rhythm. The 12-lead ECGs were obtained in the traditional lead position and record ...
Syncope:
... Teach counterpressure maneuvers Do not treat patients who have not fainted in the past year ...
... Teach counterpressure maneuvers Do not treat patients who have not fainted in the past year ...
Diastolic Dysfunction
... The bottom portion of the instantaneous pressurevolume loop (Fig. 2B, arrows) is sometimes used to quantify passive ventricular properties (8,24), but it is important to note that this is distinctly different from the true EDPVR. In particular, at high filling pressures such as may exist in the hear ...
... The bottom portion of the instantaneous pressurevolume loop (Fig. 2B, arrows) is sometimes used to quantify passive ventricular properties (8,24), but it is important to note that this is distinctly different from the true EDPVR. In particular, at high filling pressures such as may exist in the hear ...
Gallop Rhythm of the Heart
... left side of the heart in essential hypertension and aortic stenosis, and on the right side in pulmonary hypertension of varied etiology and in pulmonic stenosis. When atrial gallop is present in essential hypertension, there is invariably evidence of left ventricular hypertrophy, either from physic ...
... left side of the heart in essential hypertension and aortic stenosis, and on the right side in pulmonary hypertension of varied etiology and in pulmonic stenosis. When atrial gallop is present in essential hypertension, there is invariably evidence of left ventricular hypertrophy, either from physic ...
ARVD Review Rhythm 2.. - Tehran Arrhythmia Center
... ventricular tachycardias with left bundle branch block pattern or sudden death. The disease often is familial with an autosomal inheritance. The typical hallmarks of ARVD/C are distributed in the so-called “triangle of dysplasia.” The functional and morphologic characteristics are relevant to clinic ...
... ventricular tachycardias with left bundle branch block pattern or sudden death. The disease often is familial with an autosomal inheritance. The typical hallmarks of ARVD/C are distributed in the so-called “triangle of dysplasia.” The functional and morphologic characteristics are relevant to clinic ...
heart
... to patients 65 years and older. In the Cardiovascular Health Study that involved 5532 community-dwelling persons 65 years and older, 249 had heart failure (6). One hundred seventy (63%) of these patients had diastolic heart failure based on left ventricular ejection fraction .55%. Thirty nine patien ...
... to patients 65 years and older. In the Cardiovascular Health Study that involved 5532 community-dwelling persons 65 years and older, 249 had heart failure (6). One hundred seventy (63%) of these patients had diastolic heart failure based on left ventricular ejection fraction .55%. Thirty nine patien ...
and George F. Van Hare Krucoff, Michael M. Laks, Peter W
... Fourth, drugs have been introduced that have the potential to cause prolongation of ventricular repolarization. The failure of healthcare professionals to recognize a prolonged QT interval and prodromal polymorphic ventricular ectopy may result in sudden death because of the malignant ventricular ar ...
... Fourth, drugs have been introduced that have the potential to cause prolongation of ventricular repolarization. The failure of healthcare professionals to recognize a prolonged QT interval and prodromal polymorphic ventricular ectopy may result in sudden death because of the malignant ventricular ar ...
Syncope Update: Evaluation And Treatment
... ♦ Beware! Orthostatic hypotension is present in about 40% of patients over 70 years old. ♦ Up to 23% of patients younger than 60 have orthostatic blood pressure drops. ♦ If you are able to reproduce the patient’s symptoms on standing, this is helpful (regardless of the measurements).11 Diagnostic Te ...
... ♦ Beware! Orthostatic hypotension is present in about 40% of patients over 70 years old. ♦ Up to 23% of patients younger than 60 have orthostatic blood pressure drops. ♦ If you are able to reproduce the patient’s symptoms on standing, this is helpful (regardless of the measurements).11 Diagnostic Te ...
Catheter Ablation in New Zealand
... Atrial fibrillation is characterised by loss of the normal electrical rhythm of the heart (sinus rhythm), which is replaced by chaotic contraction of the atria (upper chambers of the heart) and results in an irregular, often rapid, heartbeat. It is associated with an approximate 2-fold increase in c ...
... Atrial fibrillation is characterised by loss of the normal electrical rhythm of the heart (sinus rhythm), which is replaced by chaotic contraction of the atria (upper chambers of the heart) and results in an irregular, often rapid, heartbeat. It is associated with an approximate 2-fold increase in c ...
Aging-related Changes in Cardiac Extracellular Matrix: Implications
... They carefully analysed serial serum samples taken before PCI and at 2 and 7 days, 2 months and 1 year after the STEMI, for markers of collagen synthesis and degradation, and their relationship with LV infarct size, ejection fraction, and volumes using serial cardiac magnetic resonance (CMR) imaging ...
... They carefully analysed serial serum samples taken before PCI and at 2 and 7 days, 2 months and 1 year after the STEMI, for markers of collagen synthesis and degradation, and their relationship with LV infarct size, ejection fraction, and volumes using serial cardiac magnetic resonance (CMR) imaging ...
12-Lead EKG Interpretation - Mississippi Nurses Association
... Junctional rhythms: Escape rhythms occur when SA node fails to initiate the electrical impulse and another pacemaker assumes the function – AV nodal escape rhythm: rate between 40-60bpm; may or may not see negative P wave before the QRS in Lead II; QRS will be narrow unless there is other underlying ...
... Junctional rhythms: Escape rhythms occur when SA node fails to initiate the electrical impulse and another pacemaker assumes the function – AV nodal escape rhythm: rate between 40-60bpm; may or may not see negative P wave before the QRS in Lead II; QRS will be narrow unless there is other underlying ...
clinical value of unipolar chest and limb leads
... such-that a state of relative positivity at the left arm is represented by an upward movement of the fibre. Since it is the difference between the potentials at the two arms which is recorded in lead I, the potentials at the right arm must be subtracted algebraically from those at the left arm. Thus ...
... such-that a state of relative positivity at the left arm is represented by an upward movement of the fibre. Since it is the difference between the potentials at the two arms which is recorded in lead I, the potentials at the right arm must be subtracted algebraically from those at the left arm. Thus ...
Working Group Report - Besancon.cardio.com
... patient to cover as much ground as possible in 6 min by walking continuously if possible, and performance is quantified by distance walked. This test is less likely to discriminate between NYHA Class II and III than the measurement of peak VO2, but may be well suited for patients with moderate to se ...
... patient to cover as much ground as possible in 6 min by walking continuously if possible, and performance is quantified by distance walked. This test is less likely to discriminate between NYHA Class II and III than the measurement of peak VO2, but may be well suited for patients with moderate to se ...
Diastolic Heart Failure After Cardiac Surgery
... decreased cardiac output and hypotension (Pinsky , 2005 2007)]. Pericardial constriction or tamponade causes increased resistance to diastolic filling and physiologically is “acute severe extrinsic diastolic failure” whereby the heart becomes physically compressed by the pericardial effusion. Renal ...
... decreased cardiac output and hypotension (Pinsky , 2005 2007)]. Pericardial constriction or tamponade causes increased resistance to diastolic filling and physiologically is “acute severe extrinsic diastolic failure” whereby the heart becomes physically compressed by the pericardial effusion. Renal ...
Prognostic Value of a Novel Classification Scheme for Heart Failure
... over five million persons in the United States and over 23 million worldwide (1). The epidemiologic study of heart failure, however, has been partly impeded by the absence of a universally agreed-upon case definition (2–12). Though numerous case definitions have been introduced into the literature—p ...
... over five million persons in the United States and over 23 million worldwide (1). The epidemiologic study of heart failure, however, has been partly impeded by the absence of a universally agreed-upon case definition (2–12). Though numerous case definitions have been introduced into the literature—p ...
Repolarization Phase at Various Sites of the Right Atrium
... The effect of temperature appears to be a predominant factor in the experiments reported here. Pipberger et al.28 observed continuous changes in polarity and configuration of T waves when the heart was exposed to room temperature. In our experiments the temperature of the laboratory was maintained a ...
... The effect of temperature appears to be a predominant factor in the experiments reported here. Pipberger et al.28 observed continuous changes in polarity and configuration of T waves when the heart was exposed to room temperature. In our experiments the temperature of the laboratory was maintained a ...
Temporary epicardial pacing after cardiac surgery
... During the insertion of a pulmonary artery catheter in a patient with left bundle branch block (although this is noted to be controversial) Bifasicular block with first degree block New onset bifasicular block (indicative of active ischaemia) Prolonged QT syndrome in the presence of significant brad ...
... During the insertion of a pulmonary artery catheter in a patient with left bundle branch block (although this is noted to be controversial) Bifasicular block with first degree block New onset bifasicular block (indicative of active ischaemia) Prolonged QT syndrome in the presence of significant brad ...
Print - Circulation Research
... Automaticity of Isolated Left Atrium. This was studied in 8 isolated atria from sensitized animals. The addition of 1 ml. of the antigen ...
... Automaticity of Isolated Left Atrium. This was studied in 8 isolated atria from sensitized animals. The addition of 1 ml. of the antigen ...
Catheter Ablation of Supraventricular and Ventricular Arrhythmias
... The risk of radiofrequency catheter ablation is related to the location of the accessory pathway. As previously mentioned, ablation of a midseptal accessory pathway carries the risk of complete AV block. In posteroseptal epicardially located accessory pathways, where the ablation has to be performed ...
... The risk of radiofrequency catheter ablation is related to the location of the accessory pathway. As previously mentioned, ablation of a midseptal accessory pathway carries the risk of complete AV block. In posteroseptal epicardially located accessory pathways, where the ablation has to be performed ...
Drug induced QT prolongation: the measurement and assessment of
... associated with QT prolongation [17, 18]. There is also diurnal variation in the QT interval which makes it important to consider time of day in the assessment of the QT interval [15]. The most common pathological conditions associated with QT prolongation are electrolyte disturbance, including hypo ...
... associated with QT prolongation [17, 18]. There is also diurnal variation in the QT interval which makes it important to consider time of day in the assessment of the QT interval [15]. The most common pathological conditions associated with QT prolongation are electrolyte disturbance, including hypo ...
Cardiac norepinephrine transporter protein expression is inversely
... Bilateral stellate ganglionectomy in the rat reduces cardiac NE content by 89 –100% (41), suggesting that ⬎90% of sympathetic innervation arises from the stellates. In the rat, all heart chambers receive bilateral innervation from the right and left stellate ganglia; however, the majority of the rig ...
... Bilateral stellate ganglionectomy in the rat reduces cardiac NE content by 89 –100% (41), suggesting that ⬎90% of sympathetic innervation arises from the stellates. In the rat, all heart chambers receive bilateral innervation from the right and left stellate ganglia; however, the majority of the rig ...
Increasing survival rate from commotio cordis
... AED ¼ automated external defibrillator; EMT ¼ emergency medical technicians. * Hispanic (n ¼ 3); Asian (n ¼ 1). †Hispanic (n ¼ 9); Asian (n ¼ 3); Pacific Islander (n ¼ 2); Pakistani (n ¼ 1); Native American (n ¼ 1). ‡1 each with basketball, cycling, equestrian, skiing, and T-ball. y1 each with baske ...
... AED ¼ automated external defibrillator; EMT ¼ emergency medical technicians. * Hispanic (n ¼ 3); Asian (n ¼ 1). †Hispanic (n ¼ 9); Asian (n ¼ 3); Pacific Islander (n ¼ 2); Pakistani (n ¼ 1); Native American (n ¼ 1). ‡1 each with basketball, cycling, equestrian, skiing, and T-ball. y1 each with baske ...
AHA Scientific Statement
... may be difficult to distinguish from ventricular tachycardia. In all of these situations, an accurate diagnosis can be readily made if an atrial electrogram is recorded. The technique for recording an atrial electrogram is described in the subsequent section on cardiac monitoring lead systems. Child ...
... may be difficult to distinguish from ventricular tachycardia. In all of these situations, an accurate diagnosis can be readily made if an atrial electrogram is recorded. The technique for recording an atrial electrogram is described in the subsequent section on cardiac monitoring lead systems. Child ...
Glucocorticoids Induce Cardiac Fibrosis via Mineralocorticoid
... In typical aldosterone targets such as renal, tubular or vascular smooth muscle cells, 11beta-hydroxysteroid dehydrogenase type II (11betaHSD2) converts glucocorticoid to inactive form, and thus aldosterone can exert specific actions on MR.5 In contrast, in several non-epithelial tissues such as hea ...
... In typical aldosterone targets such as renal, tubular or vascular smooth muscle cells, 11beta-hydroxysteroid dehydrogenase type II (11betaHSD2) converts glucocorticoid to inactive form, and thus aldosterone can exert specific actions on MR.5 In contrast, in several non-epithelial tissues such as hea ...
Checkpoint 14-1
... Valves of the heart (superior view from anterior, atria removed). (A) When the heart is relaxed (diastole), the AV valves are open and blood flows freely from the atria to the ventricles. The pulmonary and aortic valves are closed. (B) When the ventricles contract, the AV valves close and blood pum ...
... Valves of the heart (superior view from anterior, atria removed). (A) When the heart is relaxed (diastole), the AV valves are open and blood flows freely from the atria to the ventricles. The pulmonary and aortic valves are closed. (B) When the ventricles contract, the AV valves close and blood pum ...