Effect of short-term rapid ventricular pacing followed by pacing
... of ventricular tachycardia involve reduced arterial blood pressure and elevated filling pressure, which are unique stimuli for the brain stem (Taneja et al. 2002) to activate mechanisms to maintain homeostasis. Short-term cardiovascular system adaptation to tachycardia is based on the activation of ...
... of ventricular tachycardia involve reduced arterial blood pressure and elevated filling pressure, which are unique stimuli for the brain stem (Taneja et al. 2002) to activate mechanisms to maintain homeostasis. Short-term cardiovascular system adaptation to tachycardia is based on the activation of ...
Dr Dhiraj Gupta
... PhD candidates for Queen Mary University, and City University, London. I am the Chief Investigator for four ablation trials (PRESSURE, SMANPAF, PRAISE, and VISTAX), and ...
... PhD candidates for Queen Mary University, and City University, London. I am the Chief Investigator for four ablation trials (PRESSURE, SMANPAF, PRAISE, and VISTAX), and ...
The effect of aerobic continuous training and detraining on left
... [14, 22, 25]. These changes constitute the cardiac adaptability phenomenon following the physiological, in contrast with the pathological changes brought about by hypertension and aortic stenosis [26]. In the case of disease, the heart confronts elevated pressures, but physiologically such pressures ...
... [14, 22, 25]. These changes constitute the cardiac adaptability phenomenon following the physiological, in contrast with the pathological changes brought about by hypertension and aortic stenosis [26]. In the case of disease, the heart confronts elevated pressures, but physiologically such pressures ...
Understanding autonomic sympathovagal balance from short
... of that, they also encode different types of information, namely the efferent outflow of reflex mechanisms involved in the beat-to-beat control of cardiac function, the efferent activity of neurohumoral elements involved in the control of other cardiovascular parameters and random noise resulting fr ...
... of that, they also encode different types of information, namely the efferent outflow of reflex mechanisms involved in the beat-to-beat control of cardiac function, the efferent activity of neurohumoral elements involved in the control of other cardiovascular parameters and random noise resulting fr ...
Indications for dual-chamber cardioverter defibrillators at
... At implant, sinus node dysfunction was documented in 13 patients (8·5%), second- or third-degree AV block in three patients (2%), first-degree AV block (PR interval 0·270·02 s) in 16 patients (11%), paroxysmal atrial fibrillation in 10 patients (6·5%), and chronic atrial fibrillation in 10 patients ...
... At implant, sinus node dysfunction was documented in 13 patients (8·5%), second- or third-degree AV block in three patients (2%), first-degree AV block (PR interval 0·270·02 s) in 16 patients (11%), paroxysmal atrial fibrillation in 10 patients (6·5%), and chronic atrial fibrillation in 10 patients ...
Recent Advances in Pacing and Defibrillation Harish Doppalapudi
... Cardiac Defibrillators: Cardiac arrest is sudden cessation of cardiac activity with collapse, that will lead to death (Sudden Cardiac Death) without prompt intervention. Cardiac arrest is most commonly due to rapid rates in the lower chambers of the heart (ventricular fibrillation); the most effect ...
... Cardiac Defibrillators: Cardiac arrest is sudden cessation of cardiac activity with collapse, that will lead to death (Sudden Cardiac Death) without prompt intervention. Cardiac arrest is most commonly due to rapid rates in the lower chambers of the heart (ventricular fibrillation); the most effect ...
Editd anti arrhythmic - Presentation Transcript
... CLASS III: POTASSIUM CHANNEL BLOCKERS ANTI – ARRHYTHMIC DRUGS 12. CLASS IV: CALCIUM CHANNEL BLOCKERS o Blocks cardiac calcium currents o -> slow conduction o -> increase refractory period o *esp. in Ca++ dependent tissues (i.e. AV node) o Verapamil, Diltiazem, Bepridil ANTI – ARRHYTHMIC DRUGS ...
... CLASS III: POTASSIUM CHANNEL BLOCKERS ANTI – ARRHYTHMIC DRUGS 12. CLASS IV: CALCIUM CHANNEL BLOCKERS o Blocks cardiac calcium currents o -> slow conduction o -> increase refractory period o *esp. in Ca++ dependent tissues (i.e. AV node) o Verapamil, Diltiazem, Bepridil ANTI – ARRHYTHMIC DRUGS ...
Modeling Cardiac Ventricular Activation
... scarce [Durrer et al., 1979]. We may even have access to high-quality recorded data on the endocardial and epicardial potentials during cardiac activation [Gepstein et al., 1997], but we are left to guess how exactly the propagation through the myocardium takes place. However, a ventricular model th ...
... scarce [Durrer et al., 1979]. We may even have access to high-quality recorded data on the endocardial and epicardial potentials during cardiac activation [Gepstein et al., 1997], but we are left to guess how exactly the propagation through the myocardium takes place. However, a ventricular model th ...
Basics of EKG Interpretation:
... • "Diagnostic" Q wave in V1, aVL, and III may be present without indicating myocardial damage. ST Segment — represents the time when ventricular cells are in the plateau phase (phase 2) of the action potential in which there is no current flow and thus little, if any transmembrane gradient (transme ...
... • "Diagnostic" Q wave in V1, aVL, and III may be present without indicating myocardial damage. ST Segment — represents the time when ventricular cells are in the plateau phase (phase 2) of the action potential in which there is no current flow and thus little, if any transmembrane gradient (transme ...
Distribution and Structure of Purkinje Fibers in the Heart of Ostrich
... described by Hirako [15] who suggested that they represented an aberrant form of muscle fibril arising during development. This is unlikely since they are present in almost all Purkinje cells. It seems reasonable to assume that they are associated with myofibrillar formation or destruction since the ...
... described by Hirako [15] who suggested that they represented an aberrant form of muscle fibril arising during development. This is unlikely since they are present in almost all Purkinje cells. It seems reasonable to assume that they are associated with myofibrillar formation or destruction since the ...
Basics of EKG Interpretation
... • "Diagnostic" Q wave in V1, aVL, and III may be present without indicating myocardial damage. ST Segment — represents the time when ventricular cells are in the plateau phase (phase 2) of the action potential in which there is no current flow and thus little, if any transmembrane gradient (transme ...
... • "Diagnostic" Q wave in V1, aVL, and III may be present without indicating myocardial damage. ST Segment — represents the time when ventricular cells are in the plateau phase (phase 2) of the action potential in which there is no current flow and thus little, if any transmembrane gradient (transme ...
Experimental Demonstration of Concealed AV
... (c) the speed of propagation of the two types of impulses is constant within the AV junction in both forward and retrograde directions. A coincidence iof these three factors must result in a constant and repetitive coupling of artificial to spontaneous beats. The records of figure 6 (all lead II) we ...
... (c) the speed of propagation of the two types of impulses is constant within the AV junction in both forward and retrograde directions. A coincidence iof these three factors must result in a constant and repetitive coupling of artificial to spontaneous beats. The records of figure 6 (all lead II) we ...
Relationship of Heart Sounds to Acceleration of Blood Flow
... Simultaneous recordings have been made of intravascular and intracardiac pressures, aortic blood flow and acceleration, the electrocardiogram, and intracardiac sound in healthy anesthetized dogs. Intracardiac and aortic pressure were measured with the Dallons-Telco* variable inductance microtransduc ...
... Simultaneous recordings have been made of intravascular and intracardiac pressures, aortic blood flow and acceleration, the electrocardiogram, and intracardiac sound in healthy anesthetized dogs. Intracardiac and aortic pressure were measured with the Dallons-Telco* variable inductance microtransduc ...
Canadian Cardiovascular Society Atrial Fibrillation Guidelines 2010
... heart rate target of ⬍100 bpm at rest be used for most patients. In all cases, the heart rate target may need modification based on patient symptoms and preferences. Patients with persistent or permanent AF or AFL who have exertional symptoms possibly due to excessive heart rates should have an asse ...
... heart rate target of ⬍100 bpm at rest be used for most patients. In all cases, the heart rate target may need modification based on patient symptoms and preferences. Patients with persistent or permanent AF or AFL who have exertional symptoms possibly due to excessive heart rates should have an asse ...
Effect of the angiotensin-receptor
... sub-classified according to whether patients had been last seen alive within 1 h or between 1 and 24 h. Apparent sudden deaths in patients who were last seen .24 h prior to death were separately categorized as presumed sudden death. Death due to MI was assigned for patients dying within 14 days of a ...
... sub-classified according to whether patients had been last seen alive within 1 h or between 1 and 24 h. Apparent sudden deaths in patients who were last seen .24 h prior to death were separately categorized as presumed sudden death. Death due to MI was assigned for patients dying within 14 days of a ...
Cardiology Referral Guidelines - Gold Coast Primary Health Network
... If the patient has history of syncope (especially exercise induced), pre syncope, dyspnoea/chest pain on exertion should be referred to the hospital. If patient presents with heart failure, suspected endocarditis should be immediately referred to the hospital. ...
... If the patient has history of syncope (especially exercise induced), pre syncope, dyspnoea/chest pain on exertion should be referred to the hospital. If patient presents with heart failure, suspected endocarditis should be immediately referred to the hospital. ...
Now - IVG Hospitals
... A variation of the conjunctival graft that allows the surgeon to bring optical clarity and reconstructive strength to central corneal lesions is the corneocon-junctival transposition (CCT). This procedure uses the disease free peripheral cornea for reconstruction of the central wound. The resulting ...
... A variation of the conjunctival graft that allows the surgeon to bring optical clarity and reconstructive strength to central corneal lesions is the corneocon-junctival transposition (CCT). This procedure uses the disease free peripheral cornea for reconstruction of the central wound. The resulting ...
AANA Journal Course - American Association of Nurse Anesthetists
... divides into the right and left bundle branches. The bundle branches continue on in each ventricle as the Purkinje network, which is responsible for simultaneous depolarization of both ventricles. Cells of the HisPurkinje system have the fastest conduction velocities of all myocardial cells, allowin ...
... divides into the right and left bundle branches. The bundle branches continue on in each ventricle as the Purkinje network, which is responsible for simultaneous depolarization of both ventricles. Cells of the HisPurkinje system have the fastest conduction velocities of all myocardial cells, allowin ...
Formation of the Ventricles
... Knockout studies in mice have shown that several cardiac transcription factors are essential for appropriate looping morphogenesis and their loss of function tends also to be characterized by a single, common, hypoplastic ventricular chamber. In mouse embryos lacking the early cardiac homeobox gene ...
... Knockout studies in mice have shown that several cardiac transcription factors are essential for appropriate looping morphogenesis and their loss of function tends also to be characterized by a single, common, hypoplastic ventricular chamber. In mouse embryos lacking the early cardiac homeobox gene ...
The Examination of the Heart Rate Recovery after Anaerobic
... The purpose of this study was to examine the heart rate recovery depending on anaerobic running. A total of 23 professional soccer players who were player of Turkish Super Leagues, were examined. Anaerobic Run test was applied to the soccer players and their heart rates were recorded before running, ...
... The purpose of this study was to examine the heart rate recovery depending on anaerobic running. A total of 23 professional soccer players who were player of Turkish Super Leagues, were examined. Anaerobic Run test was applied to the soccer players and their heart rates were recorded before running, ...
ECG recording: basic principles
... return again to their resting charge, known as repolarisation. These waves of depolarisation and repolarisation represent an electrical current and can be detected by placing electrodes on the surface of the body.2 After the current has spread from the heart through the body, the changes are picked ...
... return again to their resting charge, known as repolarisation. These waves of depolarisation and repolarisation represent an electrical current and can be detected by placing electrodes on the surface of the body.2 After the current has spread from the heart through the body, the changes are picked ...
EKG Self Study Guide
... The EKG reveals an atrial flutter at a rate of approx 100 per minute. The QRS complexes are narrow and reveal a physiological axis. There is evidence of a premature ventricular complex, readily identifiable in the lateral chest leads. No evidence of ischemia or infarction. No evidence of R or L bund ...
... The EKG reveals an atrial flutter at a rate of approx 100 per minute. The QRS complexes are narrow and reveal a physiological axis. There is evidence of a premature ventricular complex, readily identifiable in the lateral chest leads. No evidence of ischemia or infarction. No evidence of R or L bund ...
Point process time-frequency analysis of respiratory
... Instantaneous time-frequency RSA estimates are computed using the bivariate AR point process and transfer function methods described in Section II-B. The algorithms were first tested with artificial series simulating both sudden and gradual shifts in RSA gain, as well as shifts in the main frequency ...
... Instantaneous time-frequency RSA estimates are computed using the bivariate AR point process and transfer function methods described in Section II-B. The algorithms were first tested with artificial series simulating both sudden and gradual shifts in RSA gain, as well as shifts in the main frequency ...
The Advanced Cardiovascular Life Support Guidelines
... in progress. The monitor revealed asystole, so epinephrine, 1 mg IV, was given since it had been 3 minutes since the last dose. Reversible causes of her arrest were considered: she was intubated with the ET tube in good position, on 100% Fio2, and arterial blood gas was drawn to check for acidosis a ...
... in progress. The monitor revealed asystole, so epinephrine, 1 mg IV, was given since it had been 3 minutes since the last dose. Reversible causes of her arrest were considered: she was intubated with the ET tube in good position, on 100% Fio2, and arterial blood gas was drawn to check for acidosis a ...