Using Skewness and the First-Digit Phenomenon to Identify
... episodes (Gold et al., 2010; Travers et al., 2010). Thus, developing methods for identifying signs of impending arrhythmic events with potentially serious consequences can significantly contribute toward reducing the mortality rate due to sudden cardiac death. With this aim in view there have been a ...
... episodes (Gold et al., 2010; Travers et al., 2010). Thus, developing methods for identifying signs of impending arrhythmic events with potentially serious consequences can significantly contribute toward reducing the mortality rate due to sudden cardiac death. With this aim in view there have been a ...
Cardiomyocyte apoptosis and ventricular remodeling after - AJP
... Sham-operated animals showed low rates of cardiomyocyte apoptosis (0.03%) and no change in diastolic diameter or ejection fraction during the study. Twenty-four hours after infarction, TUNEL positivity was high in the infarct areas (1.4%) and border zones (4.9%). It declined to 0.34% (P ⬍ 0.01 vs. s ...
... Sham-operated animals showed low rates of cardiomyocyte apoptosis (0.03%) and no change in diastolic diameter or ejection fraction during the study. Twenty-four hours after infarction, TUNEL positivity was high in the infarct areas (1.4%) and border zones (4.9%). It declined to 0.34% (P ⬍ 0.01 vs. s ...
Paroxysmal atrial fibrillation
... of cases in two series [14,15]. Other foci are located in the right and left atrium [15]. The importance of the pulmonary veins in the genesis of PAF is further illustrated by the beneficial effect of pulmonary vein isolation. (See "Radiofrequency catheter ablation to prevent recurrent atrial fibril ...
... of cases in two series [14,15]. Other foci are located in the right and left atrium [15]. The importance of the pulmonary veins in the genesis of PAF is further illustrated by the beneficial effect of pulmonary vein isolation. (See "Radiofrequency catheter ablation to prevent recurrent atrial fibril ...
ecg interpretation
... Sodium rapidly enters the cell through fast channels, calcium enters through slower channels, and potassium exits. ...
... Sodium rapidly enters the cell through fast channels, calcium enters through slower channels, and potassium exits. ...
Accuracy of the Electrocardiograph in Detecting Cardiac Left
... workload, though neurochemical and hormonal stimuli have also been implicated, including mediators such as cardiotrophin Submit Manuscript | http://medcraveonline.com ...
... workload, though neurochemical and hormonal stimuli have also been implicated, including mediators such as cardiotrophin Submit Manuscript | http://medcraveonline.com ...
Effect of Preload Reduction by Hemodialysis on Left Ventricular
... micrometry were only used in animal studies. Cardiac MRI can be used in humans and represents an assessment “gold standard.” This technique is only used in a few medical centers in Taiwan. Two-dimensional speckle tracking imaging echocardiography (2D-STE) has provided a new opportunity for the nonin ...
... micrometry were only used in animal studies. Cardiac MRI can be used in humans and represents an assessment “gold standard.” This technique is only used in a few medical centers in Taiwan. Two-dimensional speckle tracking imaging echocardiography (2D-STE) has provided a new opportunity for the nonin ...
Mechanical Interactions between Four Heart Chambers with and
... intact, we investigated mechanical interactions between the four heart chambers from the standpoint of ventricular pressure-volume relationships. The interactions investigated were those between (1) the atrium and the ventricle, (2) the right ventricle and left ventricles, (3) the atrium and one ven ...
... intact, we investigated mechanical interactions between the four heart chambers from the standpoint of ventricular pressure-volume relationships. The interactions investigated were those between (1) the atrium and the ventricle, (2) the right ventricle and left ventricles, (3) the atrium and one ven ...
Hyperhomocysteinemia alters sinoatrial and atrioventricular nodal
... CHAPTER I: INTRODUCTION AND BACKGROUND ...
... CHAPTER I: INTRODUCTION AND BACKGROUND ...
Junctional tachycardias
... Clinical presentation The Wolff-Parkinson-White syndrome is sometimes an incidental electrocardiographic finding, but often patients present with tachyarrhythmias. Episodes tend to be more common in young people but may come and go through life. Patients may first present when they are old. When rap ...
... Clinical presentation The Wolff-Parkinson-White syndrome is sometimes an incidental electrocardiographic finding, but often patients present with tachyarrhythmias. Episodes tend to be more common in young people but may come and go through life. Patients may first present when they are old. When rap ...
EHRA/HRS/APHRS Expert Consensus on Ventricular Arrhythmias
... (1) Infrequent ventricular ectopic beats, couplets, and triplets without other signs of an underlying SHD or an inherited arrhythmia syndrome should be considered as a normal variant in asymptomatic patients. IIa LOE C (2) An invasive electrophysiological study (EPS) should be considered in patients ...
... (1) Infrequent ventricular ectopic beats, couplets, and triplets without other signs of an underlying SHD or an inherited arrhythmia syndrome should be considered as a normal variant in asymptomatic patients. IIa LOE C (2) An invasive electrophysiological study (EPS) should be considered in patients ...
Normal myocardial function in severe right ventricular volume
... This difference between RV and LV volume overloading may also be related, at least speculatively, to the following additional factors. First, the initial hemodynamic burden caused by sudden and severe atrioventricular valvular incompetence may be greater when imposed on the high-systolic-pressure LV ...
... This difference between RV and LV volume overloading may also be related, at least speculatively, to the following additional factors. First, the initial hemodynamic burden caused by sudden and severe atrioventricular valvular incompetence may be greater when imposed on the high-systolic-pressure LV ...
Influence of pacing site on canine left ventricular contraction
... and right ventricular free wall pacing were compared. At a given volume, the peak isovolumic pressure was determined while pacing from each site. The volume was then changed in a random manner, and the pacing site variation was repeated. In each heart studied, the volume was varied between approxima ...
... and right ventricular free wall pacing were compared. At a given volume, the peak isovolumic pressure was determined while pacing from each site. The volume was then changed in a random manner, and the pacing site variation was repeated. In each heart studied, the volume was varied between approxima ...
ECG Workbook - Lakeridge Health
... Anatomy and Physiology The cardiac conduction system is comprised of specialized tissues that unlike muscle tissue located elsewhere in the body can 1: generate electrical impulses (automaticity) and 2: conduct electrical impulses (conductivity). The cardiac muscle tissue is similar to other tissue ...
... Anatomy and Physiology The cardiac conduction system is comprised of specialized tissues that unlike muscle tissue located elsewhere in the body can 1: generate electrical impulses (automaticity) and 2: conduct electrical impulses (conductivity). The cardiac muscle tissue is similar to other tissue ...
... to provide benefits in several animal models of myocardial infarction (MI). However, its efficacy following MI initiation (as in clinical reality) remains to be tested. Therefore, this study investigated whether HO-1 over-expression, by cobalt protoporphyrin (CoPP) administered after LAD ligation, i ...
Age as a Risk Factor for Stroke in Atrial Fibrillation Patients
... have already demonstrated that long-term oral anticoagulation therapy can reduce the risk of stroke by approximately 64% per year in patients with nonvalvular AF. Nevertheless only 15% to 44% of AF patients at risk of stroke are prescribed warfarin. This clinical evidence-clinical practice gap is mo ...
... have already demonstrated that long-term oral anticoagulation therapy can reduce the risk of stroke by approximately 64% per year in patients with nonvalvular AF. Nevertheless only 15% to 44% of AF patients at risk of stroke are prescribed warfarin. This clinical evidence-clinical practice gap is mo ...
Myocardial metabolism in experimental infarction and heart failure
... Although multiple clinical trials completed during the past two decades have unequivocally demonstrated decreased mortality and morbidity rates - thanks to the advances in pharmacological treatment with ACE inhibitors, β-blockers and aldosterone antagonists - CHF and myocardial infarction (MI) conti ...
... Although multiple clinical trials completed during the past two decades have unequivocally demonstrated decreased mortality and morbidity rates - thanks to the advances in pharmacological treatment with ACE inhibitors, β-blockers and aldosterone antagonists - CHF and myocardial infarction (MI) conti ...
Heart rate variability before and after myocardial infarction in
... Exercise and ischemia test. Of the 50 dogs that underwent the exercise and ischemia test, 25 developed ventricular fibrillation (average time to onset 56 ± 4 s) and the remainder survived. The mean arterial pressure response to exercise and onset of myocardial ischemia was similar in the two groups ...
... Exercise and ischemia test. Of the 50 dogs that underwent the exercise and ischemia test, 25 developed ventricular fibrillation (average time to onset 56 ± 4 s) and the remainder survived. The mean arterial pressure response to exercise and onset of myocardial ischemia was similar in the two groups ...
CONSTRICTIVE PERICARDITIS
... develop. As stroke volume falls, compensatory increases in systemic resistance and sinus tachycardia develop that initially maintain cardiac output and systemic blood pressure. The impairment of diastolic filling initially impairs the ability to augment cardiac output during exercise, resulting in e ...
... develop. As stroke volume falls, compensatory increases in systemic resistance and sinus tachycardia develop that initially maintain cardiac output and systemic blood pressure. The impairment of diastolic filling initially impairs the ability to augment cardiac output during exercise, resulting in e ...
Evaluation of the Contractile State of the of the
... from the peak of the R wave of the electrocardiogram to the peak of the derivatives (t-dp/dt LV and t-A ACG) were determined under different circulatory conditions. These parameters express the duration of the development of maximum tension during isometric contraction of the ventricle. The values o ...
... from the peak of the R wave of the electrocardiogram to the peak of the derivatives (t-dp/dt LV and t-A ACG) were determined under different circulatory conditions. These parameters express the duration of the development of maximum tension during isometric contraction of the ventricle. The values o ...
C
... sudden death in most instances (64%) and heart failure deterioration in the remainder. Therefore not everyone responds and some patients rapidly deteriorate no matter the therapeutic efforts, and for them, if suitable, heart transplantation is the only option. Beta blockade and angiotensin-convertin ...
... sudden death in most instances (64%) and heart failure deterioration in the remainder. Therefore not everyone responds and some patients rapidly deteriorate no matter the therapeutic efforts, and for them, if suitable, heart transplantation is the only option. Beta blockade and angiotensin-convertin ...
Muscular Subaortic Stenosis: The Temporal
... should last as long as papillary muscle contraction, i.e., to end-systole.- If the Venturi effect is the cause of SAM and SAM-septal contact, then one would expect SAM-septal contact to cease before end-systole because of a reduced ejection velocity, or because of a decrease in left ventricular pres ...
... should last as long as papillary muscle contraction, i.e., to end-systole.- If the Venturi effect is the cause of SAM and SAM-septal contact, then one would expect SAM-septal contact to cease before end-systole because of a reduced ejection velocity, or because of a decrease in left ventricular pres ...
ECG Basics - ISAKanyakumari
... ST-T wave is a smooth, continuous waveform beginning with the J-point (end of QRS), slowly rising to the peak of the T Normal ECG the T wave is always upright in leads I, II, V3-6, and always inverted in lead aVR. Normal ST segment configuration is concave upward Convex or straight upward ST segment ...
... ST-T wave is a smooth, continuous waveform beginning with the J-point (end of QRS), slowly rising to the peak of the T Normal ECG the T wave is always upright in leads I, II, V3-6, and always inverted in lead aVR. Normal ST segment configuration is concave upward Convex or straight upward ST segment ...
Document
... model described by Torrent-Guasp, cardiac muscular structures produce two simple loops that start at the pulmonary artery and end in the aorta. These components include a horizontal basal loop that surrounds the right and left ventricles, changes direction through a spinal fold in the ventricular my ...
... model described by Torrent-Guasp, cardiac muscular structures produce two simple loops that start at the pulmonary artery and end in the aorta. These components include a horizontal basal loop that surrounds the right and left ventricles, changes direction through a spinal fold in the ventricular my ...
Mineralocorticoid receptors and the heart, multiple cell types and
... MR antagonists, in combination with current best practice therapy including angiotensin receptor blockers and angiotensinconverting enzyme inhibitors, decrease morbidity and mortality in patients with primary heart failure and heart failure secondary to myocardial infarction [1,2]. Most patients in ...
... MR antagonists, in combination with current best practice therapy including angiotensin receptor blockers and angiotensinconverting enzyme inhibitors, decrease morbidity and mortality in patients with primary heart failure and heart failure secondary to myocardial infarction [1,2]. Most patients in ...
M P I.
... Success in eliminating PSVT following catheter ablation is likely to be in the range of 95% or higher, and success in eliminating atrial flutter to be in the 90-100% range. There is less evidence on focal atrial tachycardia, with reported success rates somewhat lower. For patients who desire to avoi ...
... Success in eliminating PSVT following catheter ablation is likely to be in the range of 95% or higher, and success in eliminating atrial flutter to be in the 90-100% range. There is less evidence on focal atrial tachycardia, with reported success rates somewhat lower. For patients who desire to avoi ...
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.