How to Program a Pacemaker: Pacing mode, Rate
... Significant Problem • 58% incidence of CI in pacemaker patients • 30% of patients with Sick-Sinus Syndrome (SSS) had sinus function deterioration over 2.5 to 4-year follow-up • CI can be precipitated or exacerbated by beta-blockers or calcium channel blockers ...
... Significant Problem • 58% incidence of CI in pacemaker patients • 30% of patients with Sick-Sinus Syndrome (SSS) had sinus function deterioration over 2.5 to 4-year follow-up • CI can be precipitated or exacerbated by beta-blockers or calcium channel blockers ...
The Architecture of the Right Ventricular Outflow Tract
... and softens connective tissue. At this stage, further fat and other connective-tissue structures ineluding valvular and endocardial tissues are easily removed mechanically. Then, to restore the tensile strength of the fibers, the heart is carried through increasing concentrations of ethyl alcohol, w ...
... and softens connective tissue. At this stage, further fat and other connective-tissue structures ineluding valvular and endocardial tissues are easily removed mechanically. Then, to restore the tensile strength of the fibers, the heart is carried through increasing concentrations of ethyl alcohol, w ...
Beyond the Mitral Inflow - Society of Cardiovascular Anesthesiologists
... Several other modalities to assess LV systolic and diastolic functions have been proposed in recent years. The number of publications is extensive. Unfortunately, few of these modalities have made it to pr ...
... Several other modalities to assess LV systolic and diastolic functions have been proposed in recent years. The number of publications is extensive. Unfortunately, few of these modalities have made it to pr ...
Valvular-ventricular interaction: importance of the
... chronic mitral regurgitation are not observed in patients undergoing conventional mitral valve replacement for mitral stenosis.' Therefore the importance of the mitral apparatus in left ventricular function is difficult to ascertain from these clinical studies. Interpretation of these data is diffic ...
... chronic mitral regurgitation are not observed in patients undergoing conventional mitral valve replacement for mitral stenosis.' Therefore the importance of the mitral apparatus in left ventricular function is difficult to ascertain from these clinical studies. Interpretation of these data is diffic ...
Doping and effects of anabolic androgenic steroids on the heart: histological,
... effects, including elevation of blood pressure, depression of high density lipoprotein (HDL), and sudden cardiac death.3 In some cases, infarction has occurred without evident coronary thrombosis or atherosclerosis, leading to the hypothesis that AAS may induce coronary vasospasm and cardiac arrhyth ...
... effects, including elevation of blood pressure, depression of high density lipoprotein (HDL), and sudden cardiac death.3 In some cases, infarction has occurred without evident coronary thrombosis or atherosclerosis, leading to the hypothesis that AAS may induce coronary vasospasm and cardiac arrhyth ...
Teaching Rounds in Cardiac Electrophysiology
... anterior oblique (LAO, right) views. B, Intracardiac electrograms and ablation signal at the earliest antegrade ventricular activation location at PSTA (left), the earliest antegrade ventricular activation location at PSMA (middle), and the disappearance of right bundle branch block pattern followin ...
... anterior oblique (LAO, right) views. B, Intracardiac electrograms and ablation signal at the earliest antegrade ventricular activation location at PSTA (left), the earliest antegrade ventricular activation location at PSMA (middle), and the disappearance of right bundle branch block pattern followin ...
Ventricular long axis function: amplitudes and timings
... rotational movement around its longitudinal axis [7]. In diastole, however, early ventricular relaxation returns the mitral valve annulus (MA) back to its original position in a motion that is predominantly cephalad. This annular displacement, its velocities and timings in relation to blood flow are ...
... rotational movement around its longitudinal axis [7]. In diastole, however, early ventricular relaxation returns the mitral valve annulus (MA) back to its original position in a motion that is predominantly cephalad. This annular displacement, its velocities and timings in relation to blood flow are ...
PACING INITIAL ASSESSMENT Successful and non
... Note the numbers on the sensing panel represent the minimum size of the ventricular signal that the pacemaker will recognise thus higher numbers are less sensitive. Sensing problems are often the root cause of abnormal pacing behaviour. If the pacemaker is putting out pacing spikes “on top of” the p ...
... Note the numbers on the sensing panel represent the minimum size of the ventricular signal that the pacemaker will recognise thus higher numbers are less sensitive. Sensing problems are often the root cause of abnormal pacing behaviour. If the pacemaker is putting out pacing spikes “on top of” the p ...
Prognostic Implications of Left Ventricular Mass and Geometry
... analysis workstation in a core laboratory. RV ⴝ right ventricular Of the initial cohort, 7 patients were exRWT ⴝ relative wall thickness cluded before analysis because of insufficient echocardiographic images and 603 patients were available at baseline for quantitative echocardiographic analysis. Th ...
... analysis workstation in a core laboratory. RV ⴝ right ventricular Of the initial cohort, 7 patients were exRWT ⴝ relative wall thickness cluded before analysis because of insufficient echocardiographic images and 603 patients were available at baseline for quantitative echocardiographic analysis. Th ...
Prognosis of Patients with Acute Pulmonary After Acute
... and all had significant (Dr 70% stenosis) three-vessel disease and two had left main coronary artery disease. Therefore, the predischarge ejection fraction did not predict prognosis for this group of patients. Patients with acute pulmonary edema in the course of myocardial infarction form a high-ris ...
... and all had significant (Dr 70% stenosis) three-vessel disease and two had left main coronary artery disease. Therefore, the predischarge ejection fraction did not predict prognosis for this group of patients. Patients with acute pulmonary edema in the course of myocardial infarction form a high-ris ...
Full Text - Res Cardiovasc Med
... increases in depolarization duration and not in repolarization. Objectives: In this study, we aimed to apply corrected JT interval (JTc) as an appropriate measure of ventricular repolarization for predicting QTc in a formula. Patients and Methods: The study population consisted of 101 patients with ...
... increases in depolarization duration and not in repolarization. Objectives: In this study, we aimed to apply corrected JT interval (JTc) as an appropriate measure of ventricular repolarization for predicting QTc in a formula. Patients and Methods: The study population consisted of 101 patients with ...
Paced right bundle branch block: where is the catheter
... pacing.1-3 Without recognition of the potential complications, the adverse effects can outweigh the beneficial effects. Regardless of the site of lead insertion, fluoroscopic guidance during the procedure greatly facilitates anatomically accurate lead placement. On occasion, the urgency of the clini ...
... pacing.1-3 Without recognition of the potential complications, the adverse effects can outweigh the beneficial effects. Regardless of the site of lead insertion, fluoroscopic guidance during the procedure greatly facilitates anatomically accurate lead placement. On occasion, the urgency of the clini ...
NCD Watch August 2016
... Ethnicity — Atrial fibrillation is more common in Whites than in other racial groups, such as Blacks and Asians.11, 15 For example, a U.S. study found that Whites had 32% increased risk of atrial fibrillation at age 50 compared with non-Whites.15 Cardiovascular diseases, such as hypertension, corona ...
... Ethnicity — Atrial fibrillation is more common in Whites than in other racial groups, such as Blacks and Asians.11, 15 For example, a U.S. study found that Whites had 32% increased risk of atrial fibrillation at age 50 compared with non-Whites.15 Cardiovascular diseases, such as hypertension, corona ...
Associations Between Cardiac Fibrosis and
... CTGF) in heart failure patients with and without longstanding AF. This study emphasizes that increased atrial stretch in advanced heart failure may perhaps contribute to the presence of AF. Our study demonstrated that HF patients in SR had extensive atrial fibrosis as measured by CVF. Compared to pr ...
... CTGF) in heart failure patients with and without longstanding AF. This study emphasizes that increased atrial stretch in advanced heart failure may perhaps contribute to the presence of AF. Our study demonstrated that HF patients in SR had extensive atrial fibrosis as measured by CVF. Compared to pr ...
Diurnal variations of the dominant cycle length of chronic atrial
... recording. The search for such a segment and, subsequently, in the analysis of atrial cycle length was driven by the quality of the original. The same procedure was repeated for each hour of each recording. Initially, the segment of the first 5 min of the hour was taken. If there was low signal-to-n ...
... recording. The search for such a segment and, subsequently, in the analysis of atrial cycle length was driven by the quality of the original. The same procedure was repeated for each hour of each recording. Initially, the segment of the first 5 min of the hour was taken. If there was low signal-to-n ...
of atrial dysrhythmias - Heart
... quinidine blood levels used to maintain sinus rhythm after the electroversion of atrial dysrhythmias in 24 patients. Sinus rhythm was brought about by phased direct current shock, neither preceded by nor followed by Kinidin, and all 24 patients relapsed to their original rhythm disturbance, the mean ...
... quinidine blood levels used to maintain sinus rhythm after the electroversion of atrial dysrhythmias in 24 patients. Sinus rhythm was brought about by phased direct current shock, neither preceded by nor followed by Kinidin, and all 24 patients relapsed to their original rhythm disturbance, the mean ...
Molecular determinants of heart failure with normal left ventricular
... length, whereas in eccentric hypertrophy, cardiomyocytes grow proportionally in longitudinal and transverse directions. This difference in cardiomyocyte remodeling correlates with distinct patterns of peptide growth factor induction in both conditions [9]. As shown in our studies, different correlat ...
... length, whereas in eccentric hypertrophy, cardiomyocytes grow proportionally in longitudinal and transverse directions. This difference in cardiomyocyte remodeling correlates with distinct patterns of peptide growth factor induction in both conditions [9]. As shown in our studies, different correlat ...
Cross-sectional Echocardiographic Diagnosis
... angiographically, surgically or pathologically diagnosed univentricular heart, constituted the patient population. Twenty-eight patients underwent two-dimensional echocardiographic examination during admission for their first catheterization and before angiography. Sixteen underwent two-dimensional ...
... angiographically, surgically or pathologically diagnosed univentricular heart, constituted the patient population. Twenty-eight patients underwent two-dimensional echocardiographic examination during admission for their first catheterization and before angiography. Sixteen underwent two-dimensional ...
NT-proBNP and the diagnosis of exercise-induced myocardial ischaemia 264
... The B-type natriuretic peptides are sensitive markers of ventricular dysfunction and are playing an increasingly important role in the diagnosis, management and prognosis of cardiac disease.1-5 Exercise has been shown to increase BNP secretion;6 in subjects with myocardial ischaemia this elevation i ...
... The B-type natriuretic peptides are sensitive markers of ventricular dysfunction and are playing an increasingly important role in the diagnosis, management and prognosis of cardiac disease.1-5 Exercise has been shown to increase BNP secretion;6 in subjects with myocardial ischaemia this elevation i ...
Print - Circulation
... angiographically, surgically or pathologically diagnosed univentricular heart, constituted the patient population. Twenty-eight patients underwent two-dimensional echocardiographic examination during admission for their first catheterization and before angiography. Sixteen underwent two-dimensional ...
... angiographically, surgically or pathologically diagnosed univentricular heart, constituted the patient population. Twenty-eight patients underwent two-dimensional echocardiographic examination during admission for their first catheterization and before angiography. Sixteen underwent two-dimensional ...
Stable Microreentrant Sources as a Mechanism of Atrial
... between the LAA and PV ostium was also irregular, with a DF of 21.3 Hz. These recordings suggested that the source of the fastest activity was present in the posterior LA. To localize periodic activity at the fastest frequency (21.3 Hz, '47 ms), we then recorded electrograms at many sites in the pos ...
... between the LAA and PV ostium was also irregular, with a DF of 21.3 Hz. These recordings suggested that the source of the fastest activity was present in the posterior LA. To localize periodic activity at the fastest frequency (21.3 Hz, '47 ms), we then recorded electrograms at many sites in the pos ...
ESR 5-6(СС).indd
... Analysis of recent data shows that cardio vascular disease remains the leading cause of death in the developed world [1; 2; 3; 5]. Heart frequently undergoes pathological effects of endogenous and exogenous stimuli, resulting in not only a violation of its function, but also develop various patholog ...
... Analysis of recent data shows that cardio vascular disease remains the leading cause of death in the developed world [1; 2; 3; 5]. Heart frequently undergoes pathological effects of endogenous and exogenous stimuli, resulting in not only a violation of its function, but also develop various patholog ...
Treatment Considerations for a Dual Epidemic of Atrial Fibrillation
... dependent on the production and maintenance of multiple re-entrant wavelets.32,33 HF enhances the production of these multiple wavelets through a combination of direct mechanical effects29 and production of a characteristic neurohormonal/cytokine milieu, which act to alter the atrial structure and i ...
... dependent on the production and maintenance of multiple re-entrant wavelets.32,33 HF enhances the production of these multiple wavelets through a combination of direct mechanical effects29 and production of a characteristic neurohormonal/cytokine milieu, which act to alter the atrial structure and i ...
Cardiac Tissue Structure, Properties, and Performance: A Materials
... interventricular interactions as well as action potential conduction and other factors. Sarcomere function is affected by calcium concentration and loading conditions including both the length of the sarcomere and the magnitude and frequency with which the load is applied. In vivo, over the normal c ...
... interventricular interactions as well as action potential conduction and other factors. Sarcomere function is affected by calcium concentration and loading conditions including both the length of the sarcomere and the magnitude and frequency with which the load is applied. In vivo, over the normal c ...
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.