arrhythmogenesis in mitral valve prolapse
... which are generally present in the terminal part of the complex for the positive signal averaged ECG13. Ventricular late potentials represent areas of heterogeneity of electrical activation where speed of cardiac impulse slows down. These areas behave as the substrates for microreentry circuits lead ...
... which are generally present in the terminal part of the complex for the positive signal averaged ECG13. Ventricular late potentials represent areas of heterogeneity of electrical activation where speed of cardiac impulse slows down. These areas behave as the substrates for microreentry circuits lead ...
opinions and hypotheses
... to coronary artery disease, are also encouraging.1,2,12,19,23–27 A major ongoing prospective, nonrandomized, multicenter study of ventricular resynchronization2 is being conducted in patients with NYHA class III/IV drug-refractory CHF, left ventricular dysfunction (left ventricular ejection fraction ...
... to coronary artery disease, are also encouraging.1,2,12,19,23–27 A major ongoing prospective, nonrandomized, multicenter study of ventricular resynchronization2 is being conducted in patients with NYHA class III/IV drug-refractory CHF, left ventricular dysfunction (left ventricular ejection fraction ...
Human Heart Weight at High Altitude
... Oroya, Peru. The residents of this area live at an altitude of between 12,000 and 14,000 feet. The hearts of residents at sea level were obtained from the Pathology Department of the San Mateo Community Hospital and the Stanford Medical School. The residents of this area live essentially at sea leve ...
... Oroya, Peru. The residents of this area live at an altitude of between 12,000 and 14,000 feet. The hearts of residents at sea level were obtained from the Pathology Department of the San Mateo Community Hospital and the Stanford Medical School. The residents of this area live essentially at sea leve ...
Systolic time intervals as simple
... Linear regression analyses were undertaken to search for a potential correlation between STI and heart rate or QRS width. Figure 4 illustrates that no correlation was observed between PEP and heart rate (Figure 4A), whereas a correlation was found between LVET and heart rate (r ¼ 0.61, P , 0.001) (F ...
... Linear regression analyses were undertaken to search for a potential correlation between STI and heart rate or QRS width. Figure 4 illustrates that no correlation was observed between PEP and heart rate (Figure 4A), whereas a correlation was found between LVET and heart rate (r ¼ 0.61, P , 0.001) (F ...
Noninvasive Assessment of Local Myocardium Repolarization
... measured data from 12 patients (9 men, 3 women, age 45−69) after myocardial infarction (MI) that underwent percutaneous coronary intervention (PCI) on single coronary vessel (9 on LAD, 1 on left Cx and 2 on RCA) ...
... measured data from 12 patients (9 men, 3 women, age 45−69) after myocardial infarction (MI) that underwent percutaneous coronary intervention (PCI) on single coronary vessel (9 on LAD, 1 on left Cx and 2 on RCA) ...
Assessing left ventricular systolic function in shock: evaluation of
... Introduction: Assessing left ventricular (LV) systolic function in a rapid and reliable way can be challenging in the critically ill patient. The purpose of this study was to evaluate the feasibility and reliability of, as well as the association between, commonly used LV systolic parameters, by usi ...
... Introduction: Assessing left ventricular (LV) systolic function in a rapid and reliable way can be challenging in the critically ill patient. The purpose of this study was to evaluate the feasibility and reliability of, as well as the association between, commonly used LV systolic parameters, by usi ...
Is left ventricular volume during diastasis the real equilibrium volume
... The experimental observation of diastolic suction or “vis a fronte” (a force acting from in front) dates back nearly 2 millennia to Galen, who concluded that the heart can fill itself (26). However, controversy regarding diastolic suction (7) has persisted. Brecher noted (5) experimental evidence of ...
... The experimental observation of diastolic suction or “vis a fronte” (a force acting from in front) dates back nearly 2 millennia to Galen, who concluded that the heart can fill itself (26). However, controversy regarding diastolic suction (7) has persisted. Brecher noted (5) experimental evidence of ...
Assessing left ventricular systolic function in shock
... Introduction: Assessing left ventricular (LV) systolic function in a rapid and reliable way can be challenging in the critically ill patient. The purpose of this study was to evaluate the feasibility and reliability of, as well as the association between, commonly used LV systolic parameters, by usi ...
... Introduction: Assessing left ventricular (LV) systolic function in a rapid and reliable way can be challenging in the critically ill patient. The purpose of this study was to evaluate the feasibility and reliability of, as well as the association between, commonly used LV systolic parameters, by usi ...
Approach to syncope
... Life threatening conditions of syncope: Certain cardiac conditions may present with syncope and can be serious and even life threatening. As a result of either an arrhythmia or structural heart condition, cardiac output may abruptly decrease leading to syncope. - Primary Electrical Disturbances: In ...
... Life threatening conditions of syncope: Certain cardiac conditions may present with syncope and can be serious and even life threatening. As a result of either an arrhythmia or structural heart condition, cardiac output may abruptly decrease leading to syncope. - Primary Electrical Disturbances: In ...
Clinical Differentiation Between Physiological Remodeling and
... BACKGROUND Physiological cardiac adaptation to regular exercise, including biventricular dilation and T-wave inversion (TWI), may create diagnostic overlap with arrhythmogenic right ventricular cardiomyopathy (ARVC). OBJECTIVES The goal of this study was to assess the accuracy of diagnostic criteria ...
... BACKGROUND Physiological cardiac adaptation to regular exercise, including biventricular dilation and T-wave inversion (TWI), may create diagnostic overlap with arrhythmogenic right ventricular cardiomyopathy (ARVC). OBJECTIVES The goal of this study was to assess the accuracy of diagnostic criteria ...
Hydraulic forces contribute to left ventricular diastolic filling
... important component of the total force responsible for left ventricular filling. These findings bring new insights into the physiological mechanisms governing diastolic function. The size of the LA and the LV vary during the cardiac cycle. Since the hydraulic force is proportional to the time-varyin ...
... important component of the total force responsible for left ventricular filling. These findings bring new insights into the physiological mechanisms governing diastolic function. The size of the LA and the LV vary during the cardiac cycle. Since the hydraulic force is proportional to the time-varyin ...
Percutaneous implantation of the left ventricular
... motion abnormalities following myocardial infarction. In one patient, the VPD was removed 3 days post implantation and the patient subsequently died due to extra-cardiac sepsis. When compared with baseline, there was significant improvement at 6 and 12 months following VPD implantation in NYHA class ...
... motion abnormalities following myocardial infarction. In one patient, the VPD was removed 3 days post implantation and the patient subsequently died due to extra-cardiac sepsis. When compared with baseline, there was significant improvement at 6 and 12 months following VPD implantation in NYHA class ...
Action Potential Characteristics and Arrhythmogenic Properties of
... specific ion channel proteins in the cardiac excitation, the murine experimental model has become a valuable tool in the investigation of the cardiac excitation process.1– 6 However, the ionic mechanism underlying excitation of the heart in any species is dependent on the specific set of ion channel ...
... specific ion channel proteins in the cardiac excitation, the murine experimental model has become a valuable tool in the investigation of the cardiac excitation process.1– 6 However, the ionic mechanism underlying excitation of the heart in any species is dependent on the specific set of ion channel ...
Subacute cardiac perforations associated with active
... Cardiac perforation is the most serious, but fortunately very uncommon complication of a pacemaker, implantable cardioverter defibrillator (ICD), or cardiac resynchronization therapy device (CRT) implantation. The published incidence of this complication varies from 0.4 even to 5.2%, but nowadays it ...
... Cardiac perforation is the most serious, but fortunately very uncommon complication of a pacemaker, implantable cardioverter defibrillator (ICD), or cardiac resynchronization therapy device (CRT) implantation. The published incidence of this complication varies from 0.4 even to 5.2%, but nowadays it ...
Prognostic value of electrocardiographic criteria for left ventricular
... have compared their relative prognostic value for predicting cardiovascular (CV) mortality. Methods We analyzed the first ECG on 46 950 consecutive veterans. We targeted male outpatients with a body mass index N20 to avoid confounding by complicating catabolic illnesses and further excluded those wi ...
... have compared their relative prognostic value for predicting cardiovascular (CV) mortality. Methods We analyzed the first ECG on 46 950 consecutive veterans. We targeted male outpatients with a body mass index N20 to avoid confounding by complicating catabolic illnesses and further excluded those wi ...
Supplementary Materials: Alginate Oligosaccharide Prevents
... spectroscopy. The M/G ratio of AOS was approximately 1/2.6 by calculating the integral areas of the M and G residues. ...
... spectroscopy. The M/G ratio of AOS was approximately 1/2.6 by calculating the integral areas of the M and G residues. ...
Downloaded - Circulation
... sensitivity of the electrocardiogram for detection of LVH and are easily applicable in clinical practice. In addition, the new regression criteria, incorporating the T wave in V1, QRS duration, the magnitude of the negative P terminal force in V,, and patient sex, further improve electrocardiographi ...
... sensitivity of the electrocardiogram for detection of LVH and are easily applicable in clinical practice. In addition, the new regression criteria, incorporating the T wave in V1, QRS duration, the magnitude of the negative P terminal force in V,, and patient sex, further improve electrocardiographi ...
Circulation Research AUGUST
... right atrium and the right ventricle were stimulated sequentially with a stimulus interval of 50 to 100 msec (3 dogs). Heart rates for the separate experiments ranged from 133 to 158 with a mean of 145 beat/min. Coronary blood flow (minus left Thebesian flow) was measured by timed collection of the ...
... right atrium and the right ventricle were stimulated sequentially with a stimulus interval of 50 to 100 msec (3 dogs). Heart rates for the separate experiments ranged from 133 to 158 with a mean of 145 beat/min. Coronary blood flow (minus left Thebesian flow) was measured by timed collection of the ...
Coronary Artery Atherosclerosis Is Related to Reduced Regional
... Therefore, an increased negativity denotes better function. Individual strain and strain rate reread variability was found to be 4% and 3%, respectively, for all 3 of the arterial systems. CT scans were evaluated blindly with respect to scan pairs and to all of the clinical data using a computerized ...
... Therefore, an increased negativity denotes better function. Individual strain and strain rate reread variability was found to be 4% and 3%, respectively, for all 3 of the arterial systems. CT scans were evaluated blindly with respect to scan pairs and to all of the clinical data using a computerized ...
Steven Shea, Li Pan, David A. Bluemke and João A.C. Lima Thor
... Therefore, an increased negativity denotes better function. Individual strain and strain rate reread variability was found to be 4% and 3%, respectively, for all 3 of the arterial systems. CT scans were evaluated blindly with respect to scan pairs and to all of the clinical data using a computerized ...
... Therefore, an increased negativity denotes better function. Individual strain and strain rate reread variability was found to be 4% and 3%, respectively, for all 3 of the arterial systems. CT scans were evaluated blindly with respect to scan pairs and to all of the clinical data using a computerized ...
Exercise training in chronic heart failure: why, when and how
... Changes in myocardial high energy phosphate metabolism have been shown to be related to the severity of left ventricular dysfunction. We have recently studied the influence of exercise training on myocardial high-energy metabolism, and the PCr/ATP ratio in patients with chronic heart failure. Our pr ...
... Changes in myocardial high energy phosphate metabolism have been shown to be related to the severity of left ventricular dysfunction. We have recently studied the influence of exercise training on myocardial high-energy metabolism, and the PCr/ATP ratio in patients with chronic heart failure. Our pr ...
Diagnosis, Treatment and Prognosis of Cardiac Rupture in Acute
... (1,5,17,20,39) but its proportion is likely to be higher when considering also those patients who die suddenly outside of the hospital (16,40). In this initial presentation, factors such as a persistent strain in the infarcted zone due to sustained arterial hypertension (2,9,17 -19,41) or to mainten ...
... (1,5,17,20,39) but its proportion is likely to be higher when considering also those patients who die suddenly outside of the hospital (16,40). In this initial presentation, factors such as a persistent strain in the infarcted zone due to sustained arterial hypertension (2,9,17 -19,41) or to mainten ...
Effect of healthy aging on left ventricular relaxation and - AJP
... ⱖ65 yr). Pulmonary capillary wedge pressure (PCWP), stroke volume, LV end-diastolic volume, and Doppler measures of LV diastolic filling were collected at multiple loading conditions, including supine baseline, lower body negative pressure to reduce LV filling, and saline infusion to increase LV fil ...
... ⱖ65 yr). Pulmonary capillary wedge pressure (PCWP), stroke volume, LV end-diastolic volume, and Doppler measures of LV diastolic filling were collected at multiple loading conditions, including supine baseline, lower body negative pressure to reduce LV filling, and saline infusion to increase LV fil ...
Value of Apical Circumferential Strain in the Early Post
... Conclusion: In patients with anterior AMI, LV apical circumferential strain in the early post-MI period constitutes a significant prognostic factor for LV remodeling at 3 months. Assessment of this parameter may identify patients at high risk for heart failure development. ...
... Conclusion: In patients with anterior AMI, LV apical circumferential strain in the early post-MI period constitutes a significant prognostic factor for LV remodeling at 3 months. Assessment of this parameter may identify patients at high risk for heart failure development. ...
Articles in PresS. Am J Physiol Heart Circ Physiol (January 22, 2016
... hypertrophy (38) and to decline with healthy ageing (41). The rapid relaxation resulting ...
... hypertrophy (38) and to decline with healthy ageing (41). The rapid relaxation resulting ...
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.