The Raw ECG Signal Processing and the Detection of QRS Complex
... algorithms suitable for the QRS complex detection. The first is the online ECG QRS wave detector. This algorithm uses the state-machine logic to determine different peaks in an ECG. It is based on averaging and adaptive thresholds that are fluctuating in respect to the noise and the signal. This alg ...
... algorithms suitable for the QRS complex detection. The first is the online ECG QRS wave detector. This algorithm uses the state-machine logic to determine different peaks in an ECG. It is based on averaging and adaptive thresholds that are fluctuating in respect to the noise and the signal. This alg ...
Transcatheter Aortic Valve Replacement With Early
... BACKGROUND Few studies have evaluated the clinical outcomes of transcatheter aortic valve replacement (TAVR) in patients with bicuspid aortic valve stenosis (AS). Particularly, limited data exist comparing the results of TAVR with new-generation devices versus early-generation devices. OBJECTIVES Th ...
... BACKGROUND Few studies have evaluated the clinical outcomes of transcatheter aortic valve replacement (TAVR) in patients with bicuspid aortic valve stenosis (AS). Particularly, limited data exist comparing the results of TAVR with new-generation devices versus early-generation devices. OBJECTIVES Th ...
EFFECT OF CAFFEINE ON FROG MUSCLE
... muscle strip preparation of the amphibian heart failed to respond to caffeine, but the beating sinoatrial muscle strip when treated with caffeine (30mM) showed an increase in frequency as well as in amplitude of contractions. These effects are difficult to explain. Histological and biochemical studi ...
... muscle strip preparation of the amphibian heart failed to respond to caffeine, but the beating sinoatrial muscle strip when treated with caffeine (30mM) showed an increase in frequency as well as in amplitude of contractions. These effects are difficult to explain. Histological and biochemical studi ...
Strecker_Successful
... Introduction. For patients with terminal heart failure, heart transplantation (HTX) has become an established therapy. Before transplantation there are many repeated measurements with a pulmonary artery catheter (PAC) via the superior vena cava (SVC) necessary. After transplantation, endomyocardial ...
... Introduction. For patients with terminal heart failure, heart transplantation (HTX) has become an established therapy. Before transplantation there are many repeated measurements with a pulmonary artery catheter (PAC) via the superior vena cava (SVC) necessary. After transplantation, endomyocardial ...
Atrial tachycardia
... Amiodarone: IIb. ACC/AHA/HRS Guidelines for supraventricular arrhythmias, 2003 ...
... Amiodarone: IIb. ACC/AHA/HRS Guidelines for supraventricular arrhythmias, 2003 ...
Cardiovascular responses to static exercise
... the hand grip test. Although this test does not strain a large group of muscles and cannot be used to assess general muscle performance, it is useful in testing the cardiac response to increased load. The test performance is such that a person is first asked to squeeze a grip dynamometer at maximal ...
... the hand grip test. Although this test does not strain a large group of muscles and cannot be used to assess general muscle performance, it is useful in testing the cardiac response to increased load. The test performance is such that a person is first asked to squeeze a grip dynamometer at maximal ...
Atrioventricular Nodal Function in the Immature Canine
... neonate is equal to or shorter than that of the ventricle, providing little or no protection to the ventricle against rapid atrial rates and allowing closely coupled atrial beats to fall within the ventricular vulnerable period. We evaluated atrioventricular node function in 21 mongrel neonatal pupp ...
... neonate is equal to or shorter than that of the ventricle, providing little or no protection to the ventricle against rapid atrial rates and allowing closely coupled atrial beats to fall within the ventricular vulnerable period. We evaluated atrioventricular node function in 21 mongrel neonatal pupp ...
Understanding Lusitropy
... (LV) relaxation begins during late ejection and continues throughout an early rapid filling and ends fully relaxed by diastasis, before the atrial systole begins. Diastolic (lusitropic) properties can be described by both active relaxation and passive diastolic properties. This active relaxation dur ...
... (LV) relaxation begins during late ejection and continues throughout an early rapid filling and ends fully relaxed by diastasis, before the atrial systole begins. Diastolic (lusitropic) properties can be described by both active relaxation and passive diastolic properties. This active relaxation dur ...
The surgeon`s role in transcatheter aortic valve implantation (TAVI)
... approaches are truly minimally invasive and avoid the use of cardio-pulmonary bypass and cardioplegic arrest. TAVI is associated with good outcome and acceptable complication rates. The outcome of TAVI has improved over the last few years as centres became more experienced in the procedure. Up to no ...
... approaches are truly minimally invasive and avoid the use of cardio-pulmonary bypass and cardioplegic arrest. TAVI is associated with good outcome and acceptable complication rates. The outcome of TAVI has improved over the last few years as centres became more experienced in the procedure. Up to no ...
Downloaded - Circulation
... Hospital-Cornell Medical Center from September 1978 to July 1982. Complete clinical data and a 12-lead electrocardiogram in non-paced rhythm obtained within a mean of 10 days from the date of death were available for a total of 135 patients. Women who had undergone a left-sided mastectomy were exclu ...
... Hospital-Cornell Medical Center from September 1978 to July 1982. Complete clinical data and a 12-lead electrocardiogram in non-paced rhythm obtained within a mean of 10 days from the date of death were available for a total of 135 patients. Women who had undergone a left-sided mastectomy were exclu ...
DEPRESSION IN CONGESTIVE HEART FAILURE PATIENTS
... The Role of the Advanced Practice Nurse Introduction ...
... The Role of the Advanced Practice Nurse Introduction ...
Sick Sinus Syndrome: A Review
... abnormal propagation from the sinoatrial node, which prevents it from performing its pacemaking function. This condition, also known as sinus node dysfunction, is associated with an atrial rate that does not meet the body’s physiologic requirements. It manifests clinically as arrhythmias that can in ...
... abnormal propagation from the sinoatrial node, which prevents it from performing its pacemaking function. This condition, also known as sinus node dysfunction, is associated with an atrial rate that does not meet the body’s physiologic requirements. It manifests clinically as arrhythmias that can in ...
Manganese Superoxide Dismutase: Guardian of the Heart
... protecting against the damaging effects of reactive oxygen species (ROS). Superoxide’s (O2.-) are the first oxidant produced by the metabolism of oxygen in the mitochondria of eukaryotic cells, and MnSOD plays an important role in sequestering this free radical. The increased levels of ROS due to ov ...
... protecting against the damaging effects of reactive oxygen species (ROS). Superoxide’s (O2.-) are the first oxidant produced by the metabolism of oxygen in the mitochondria of eukaryotic cells, and MnSOD plays an important role in sequestering this free radical. The increased levels of ROS due to ov ...
The Heart - Pearson Higher Education
... ur ceaselessly beating heart has intrigued people for centuries. The ancient Greeks believed the heart was the seat of intelligence. Others thought it was the source of emotions. While these ideas have proved false, we do know that emotions affect heart rate. When your heart pounds or skips a beat, ...
... ur ceaselessly beating heart has intrigued people for centuries. The ancient Greeks believed the heart was the seat of intelligence. Others thought it was the source of emotions. While these ideas have proved false, we do know that emotions affect heart rate. When your heart pounds or skips a beat, ...
Atresia of the Coronary Sinus Ostium to the Right Atrium with a
... CAETANO, A. G.; RIBEIRO, T. C.; FILHO, O. A. R. & FAZAN, V. P. S. Atresia of the coronary sinus ostium to the right atrium with a persistent left superior vena cava. Int. J. Morphol., 27(3):771-776, 2009. SUMMARY: The coronary sinus has lately assumed an important role in the cardiologic clinic once ...
... CAETANO, A. G.; RIBEIRO, T. C.; FILHO, O. A. R. & FAZAN, V. P. S. Atresia of the coronary sinus ostium to the right atrium with a persistent left superior vena cava. Int. J. Morphol., 27(3):771-776, 2009. SUMMARY: The coronary sinus has lately assumed an important role in the cardiologic clinic once ...
Peripheral Muscle Microcirculatory Alterations in Patients With
... right-heart catheterization that showed moderate to severe PAH and normal pulmonary capillary wedge pressure, and an echocardiogram that showed normal left-ventricular ejection fraction (Table 1). Right-heart catheterization in the PAH subjects was performed within 1 month of the near-infrared spect ...
... right-heart catheterization that showed moderate to severe PAH and normal pulmonary capillary wedge pressure, and an echocardiogram that showed normal left-ventricular ejection fraction (Table 1). Right-heart catheterization in the PAH subjects was performed within 1 month of the near-infrared spect ...
Volume Changes in Painful and Painless Myocardial
... The values relating to the constancy of output of the scintillation probe, assessed in seven of the control patients, are given in Table 2. The average change from the mean value for the group was 1.54±+ 1.10%, 3.39±+-3.31%, 3.29±+-2.59%, and 1.40 + 1.08% for end-diastolic volume, end-systolic volum ...
... The values relating to the constancy of output of the scintillation probe, assessed in seven of the control patients, are given in Table 2. The average change from the mean value for the group was 1.54±+ 1.10%, 3.39±+-3.31%, 3.29±+-2.59%, and 1.40 + 1.08% for end-diastolic volume, end-systolic volum ...
Bradycardia-dependent triggered activity: relevance
... CsCl, there was no indication of conduction delay either in change of QRS duration or in ventricular electrograms. However, at higher doses, prolongation of the duration of the QRS complex could be observed transiently within the first minutes when the peak serum levels of cesium were attained. We a ...
... CsCl, there was no indication of conduction delay either in change of QRS duration or in ventricular electrograms. However, at higher doses, prolongation of the duration of the QRS complex could be observed transiently within the first minutes when the peak serum levels of cesium were attained. We a ...
Advanced Bionics Reimbursement Guide
... defibrillation for automated treatment of life-threatening ventricular arrhythmias. CRT-P Therapy Boston Scientific cardiac resynchronization pacemakers (CRT-Ps) are indicated for patients with moderate to severe heart failure (NYHA Class III/IV) including left ventricular dysfunction (EF ≤ 35%) and ...
... defibrillation for automated treatment of life-threatening ventricular arrhythmias. CRT-P Therapy Boston Scientific cardiac resynchronization pacemakers (CRT-Ps) are indicated for patients with moderate to severe heart failure (NYHA Class III/IV) including left ventricular dysfunction (EF ≤ 35%) and ...
Manual Thrombus Aspiration Is Not Associated With Reduced
... in 19.4%. No mechanical devices were included in the ...
... in 19.4%. No mechanical devices were included in the ...
geometric changes - The International Heart Institute of Montana
... the TA plane, and the PMs do not move together in the z-direction. In fact, the angle between the two planes changed by 6.4 ± 1.5º, from 11.5 ± 1.9º in diastole to 17.8 ± 2.1º in systole. The maximum rotation of the PMs from end-diastole was 2.1 ± 1.0º, and the minimum value was -4.9 ± 1.1º, with a ...
... the TA plane, and the PMs do not move together in the z-direction. In fact, the angle between the two planes changed by 6.4 ± 1.5º, from 11.5 ± 1.9º in diastole to 17.8 ± 2.1º in systole. The maximum rotation of the PMs from end-diastole was 2.1 ± 1.0º, and the minimum value was -4.9 ± 1.1º, with a ...
Isotretinoin (13-cis-retinoic acid)-associated premature ventricular
... PVCs on 12-lead ECG and 24-hour Holter monitoring or during exercise testing. We believe the temporal relationship between the isotretinoin treatment and the patient’s documented arrhythmia on ECG and Holter suggest a drug-related cause. ...
... PVCs on 12-lead ECG and 24-hour Holter monitoring or during exercise testing. We believe the temporal relationship between the isotretinoin treatment and the patient’s documented arrhythmia on ECG and Holter suggest a drug-related cause. ...
Hypoplastic left heart - British Heart Foundation
... This helps to protect the lungs. After the surgery, your baby will have a scar down the middle of his or her chest. What are the risks of the hybrid procedure? This is a relatively new procedure and the technique is still being evaluated. Your paediatric cardiologist will discuss this with you in m ...
... This helps to protect the lungs. After the surgery, your baby will have a scar down the middle of his or her chest. What are the risks of the hybrid procedure? This is a relatively new procedure and the technique is still being evaluated. Your paediatric cardiologist will discuss this with you in m ...
Regional Mechanical Properties and Microstructure of Ovine Heart
... myocardium would allow efficient mechanical signal transfer from the myocardial environment to the tissue engineered cardiac grafts. Therefore, it is important to design engineered cardiac patches that match the mechanical properties of the native myocardium29. Moreover, heart failure is a highly pr ...
... myocardium would allow efficient mechanical signal transfer from the myocardial environment to the tissue engineered cardiac grafts. Therefore, it is important to design engineered cardiac patches that match the mechanical properties of the native myocardium29. Moreover, heart failure is a highly pr ...
Cardiac contractility modulation
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Cardiac contractility modulation (CCM) is a treatment for patients with moderate to severe left ventricular systolic heart failure (NYHA class II–IV). The short- and long-term use of this therapy enhances both the strength of ventricular contraction and the heart’s pumping capacity. The CCM mechanism is based on stimulation of the cardiac muscle by non-excitatory electrical signals (NES). CCM treatment is delivered by a pacemaker-like device that applies the NES, adjusted to and synchronized with the electrical action in the cardiac cycle.In CCM therapy, electrical stimulation is applied to the cardiac muscle during the absolute refractory period. In this phase of the cardiac cycle, electrical signals cannot trigger new cardiac muscle contractions, hence this type of stimulation is known as a non-excitatory stimulation. However, the electrical CCM signals increase the influx of calcium ions into the cardiac muscle cells (cardiomyocytes). In contrast to other electrical stimulation treatments for heart failure, such as pacemaker therapy or implantable cardioverter defibrillators (ICD), CCM does not affect the cardiac rhythm directly. Rather, the aim is to enhance the heart’s natural contraction (the native cardiac contractility) sustainably over long periods of time. Furthermore, unlike most interventions that increase cardiac contractility, CCM is not associated with an unfavorable increase in oxygen demand by the heart (measured in terms of Myocardial Oxygen Consumption or MVO2). This may be explained by the beneficial effect CCM has in improving cardiac efficiency. A meta-analysis in 2014 and an overview of device-based treatment options in heart failure in 2013 concluded that CCM treatment is safe, that it is generally beneficial to patients and that CCM treatment increases the exercise tolerance (ET) and quality of life (QoL) of patients. Furthermore, preliminary long-term survival data shows that CCM is associated with lower long-term mortality in heart failure patients when compared with expected rates among similar patients not treated with CCM.