Delayed depolarization of the cog-wheel valve
... Propagation of the ECG across the RV and into the muscle surrounding the cog-wheel valve was recorded by positioning one electrode in the cog-wheel muscle (located approximately 1 cm from the base of the RV) and a second electrode at different locations on the RV (11–15 different locations in each o ...
... Propagation of the ECG across the RV and into the muscle surrounding the cog-wheel valve was recorded by positioning one electrode in the cog-wheel muscle (located approximately 1 cm from the base of the RV) and a second electrode at different locations on the RV (11–15 different locations in each o ...
Document
... • Up to 1/3 of patients do not experience chest pain • Dyspnea, nausea/ vomiting, feeling faint or light-headed, and sweating or “fever” • Those without chest pain delay longer in seeking Rx • Up to 10% of MIs are totally asymptomatic (i.e., “silent MI”) ...
... • Up to 1/3 of patients do not experience chest pain • Dyspnea, nausea/ vomiting, feeling faint or light-headed, and sweating or “fever” • Those without chest pain delay longer in seeking Rx • Up to 10% of MIs are totally asymptomatic (i.e., “silent MI”) ...
Feline Cardiomyopathies: Treatment modalities - Acapulco-Vet
... cats, decisions related to drug efficacy have been extrapolated from comparable human data and clinically derived observations associated with the theoretical knowledge of the pathophysiology. Diuretics are essential in the control of congestive heart failure. Frusemide (1-2 mg/kg q 12 hrs) is the m ...
... cats, decisions related to drug efficacy have been extrapolated from comparable human data and clinically derived observations associated with the theoretical knowledge of the pathophysiology. Diuretics are essential in the control of congestive heart failure. Frusemide (1-2 mg/kg q 12 hrs) is the m ...
M-mode echocardiography
... No interference with the measurement of other parameters No influence on the results of the toxicity study − No medication − No effects of echography on the health status of the animal ...
... No interference with the measurement of other parameters No influence on the results of the toxicity study − No medication − No effects of echography on the health status of the animal ...
invited review - AJP
... One unexpected conclusion from the screens is that the cardiovascular assembly appears to be ‘‘modular’’ (23). In other words, discrete components or attributes are eliminated by single gene mutations as though the vertebrate heart is the sum total of sets of independent structures. This is importan ...
... One unexpected conclusion from the screens is that the cardiovascular assembly appears to be ‘‘modular’’ (23). In other words, discrete components or attributes are eliminated by single gene mutations as though the vertebrate heart is the sum total of sets of independent structures. This is importan ...
Heart Failure
... amount of LV volume expelled during systole , normal EF ≥ 50 % EF misleading may occurred with mitral stenosis , ...
... amount of LV volume expelled during systole , normal EF ≥ 50 % EF misleading may occurred with mitral stenosis , ...
the heart - Dr Magrann
... Tachycardia means the heart beats too fast (>100 BPM). Bradycardia means the heart beats too slowly (<50 BPM). Marathon runners may have bradycardia because their heart is in such good shape…before doing CPR, check for heart beat for a full 10 seconds! We can see the heart’s electrical signals on an ...
... Tachycardia means the heart beats too fast (>100 BPM). Bradycardia means the heart beats too slowly (<50 BPM). Marathon runners may have bradycardia because their heart is in such good shape…before doing CPR, check for heart beat for a full 10 seconds! We can see the heart’s electrical signals on an ...
Chapter 10 Spreading the Love: The Circulatory System
... conus arteriosus where it joins the pulmonary artery, or trunk. The right ventricle extends downward toward where the heart rests against the diaphragm. A circular opening into the pulmonary trunk is covered by the pulmonary semilunar valve, socalled because of its three crescent-shaped cusps. When ...
... conus arteriosus where it joins the pulmonary artery, or trunk. The right ventricle extends downward toward where the heart rests against the diaphragm. A circular opening into the pulmonary trunk is covered by the pulmonary semilunar valve, socalled because of its three crescent-shaped cusps. When ...
Basal Tako-Tsubo cardiomyopathy: an uncommon case of TTC in in
... cardiomyopathy, which mainly affects postmenopausal women. Inverted or basal TTC (B-TTC) episodes are rarer. Our case illustrates a rare example of B-TTC in a 30-year-old woman with an acute multiple sclerosis relapse as the associated stressor, possibly providing a hypothetical pathological substra ...
... cardiomyopathy, which mainly affects postmenopausal women. Inverted or basal TTC (B-TTC) episodes are rarer. Our case illustrates a rare example of B-TTC in a 30-year-old woman with an acute multiple sclerosis relapse as the associated stressor, possibly providing a hypothetical pathological substra ...
Heart Failure
... A common cause of LV failure is increased systemic vascular resistance (as from atherosclerosis and hypertension), which increases the force of LV contractions, leading to increased demand for oxygen to the LV myocardium and LV hypoxia, which in turn decreases the force of contractions. As the cardi ...
... A common cause of LV failure is increased systemic vascular resistance (as from atherosclerosis and hypertension), which increases the force of LV contractions, leading to increased demand for oxygen to the LV myocardium and LV hypoxia, which in turn decreases the force of contractions. As the cardi ...
Fetal Cardiology
... • Review normal cardiac anatomy and its sonographic appearance (four chamber, LVOT, RVOT) • Explore diagnostic pitfalls • Review the appearance of more common structural cardiac defects ...
... • Review normal cardiac anatomy and its sonographic appearance (four chamber, LVOT, RVOT) • Explore diagnostic pitfalls • Review the appearance of more common structural cardiac defects ...
Indications for Pulmonary Valve Replacement in Repaired Tetralogy
... Association functional class without a clear change in objective exercise parameters or arrhythmia burden.10–13 However, despite numerous investigations on timing, indications, techniques, and results of PVR, large gaps in knowledge persist on how best to manage these patients. To date, it remains u ...
... Association functional class without a clear change in objective exercise parameters or arrhythmia burden.10–13 However, despite numerous investigations on timing, indications, techniques, and results of PVR, large gaps in knowledge persist on how best to manage these patients. To date, it remains u ...
Elevated sympathetic nervous system activity in patients with
... has been suggested to be activated by cytokines (6-9), thereby functioning as a pathway for communication between cytokines and the brain (6-9). Although both the sympathetic and parasympathetic nervous systems are activated by disease activity, the efferent sympathetic part of the autonomic nervous ...
... has been suggested to be activated by cytokines (6-9), thereby functioning as a pathway for communication between cytokines and the brain (6-9). Although both the sympathetic and parasympathetic nervous systems are activated by disease activity, the efferent sympathetic part of the autonomic nervous ...
New Treatment Options for Late Na Current, Arrhythmias, and
... wall and Purkinje fiber preparations. Midmyocardial cells are known to have action potentials that prolong disproportionately relative compared to those of epi- or endocardial cell types in response to many QT-prolonging drugs [51, 52]. Moreover, these cells have the largest late INa while IKr is si ...
... wall and Purkinje fiber preparations. Midmyocardial cells are known to have action potentials that prolong disproportionately relative compared to those of epi- or endocardial cell types in response to many QT-prolonging drugs [51, 52]. Moreover, these cells have the largest late INa while IKr is si ...
Full Paper - Daniel Burkhoff MD PhD
... Background: Cardiac contractility modulation (CCM) signals are nonexcitatory electrical signals delivered during the absolute refractory period intended to improve contraction. We previously tested the safety and efficacy of CCM in 428 NYHA functional class III/IV heart failure patients with EF #35% ...
... Background: Cardiac contractility modulation (CCM) signals are nonexcitatory electrical signals delivered during the absolute refractory period intended to improve contraction. We previously tested the safety and efficacy of CCM in 428 NYHA functional class III/IV heart failure patients with EF #35% ...
A noninvasive algorithm to exclude pre-capillary pulmonary hypertension
... ABSTRACT: Current guidelines recommend right heart catheterisation (RHC) in symptomatic patients at risk of pre-capillary pulmonary hypertension (PH) with echocardiographic systolic pulmonary artery pressures o36 mmHg. Growing awareness for PH, a high prevalence of postcapillary PH and the inability ...
... ABSTRACT: Current guidelines recommend right heart catheterisation (RHC) in symptomatic patients at risk of pre-capillary pulmonary hypertension (PH) with echocardiographic systolic pulmonary artery pressures o36 mmHg. Growing awareness for PH, a high prevalence of postcapillary PH and the inability ...
Human Beings as Chaotic Systems
... implanted chip that would identify when seizure were about to occur and deliver an electrical impulse to return the brain to its normal chaotic state. This is not the only application of chaos in medicine. The opportunities are as infinite as the dynamic systems themselves. While many potential appl ...
... implanted chip that would identify when seizure were about to occur and deliver an electrical impulse to return the brain to its normal chaotic state. This is not the only application of chaos in medicine. The opportunities are as infinite as the dynamic systems themselves. While many potential appl ...
Cardiorespiratory Function of Pediatric Heart Transplant Recipients
... been obtained, and no conflicts of interest have been reported by the authors or by any individuals in control of the content of this article. ...
... been obtained, and no conflicts of interest have been reported by the authors or by any individuals in control of the content of this article. ...
Feasibility of Peripheral Venous Access for Temporary Right
... transferred to the electrophysiology laboratory so that fluoroscopic guidance could be used. Continuous variables are expressed as mean ± standard deviation and categorical ones as counts and percentages. Results Twenty-five patients (17 men) were included (age 64.6 ± 11.8 years, range 49-91). The i ...
... transferred to the electrophysiology laboratory so that fluoroscopic guidance could be used. Continuous variables are expressed as mean ± standard deviation and categorical ones as counts and percentages. Results Twenty-five patients (17 men) were included (age 64.6 ± 11.8 years, range 49-91). The i ...
Anatomy of Heart
... myocardium The heart has its own nourishing circulatory system consisting of Coronary arteries—branch from the aorta to supply the heart muscle with oxygenated blood Cardiac veins—drain the myocardium of blood Coronary sinus—a large vein on the posterior of the heart, receives blood from car ...
... myocardium The heart has its own nourishing circulatory system consisting of Coronary arteries—branch from the aorta to supply the heart muscle with oxygenated blood Cardiac veins—drain the myocardium of blood Coronary sinus—a large vein on the posterior of the heart, receives blood from car ...
Chambers, conduction system and nerves of the heart
... Right branch of bundle of His on right side of interventricular septum Atrioventricular node Conducting system of heart is specialized cardiac muscle tissue, concerned with generation and propagation of cardiac impulses. This system is responsible for highly rhythmic contraction and relaxation of he ...
... Right branch of bundle of His on right side of interventricular septum Atrioventricular node Conducting system of heart is specialized cardiac muscle tissue, concerned with generation and propagation of cardiac impulses. This system is responsible for highly rhythmic contraction and relaxation of he ...
Electrocardiography
Electrocardiography (ECG or EKG*) is the process of recording the electrical activity of the heart over a period of time using electrodes placed on a patient's body. These electrodes detect the tiny electrical changes on the skin that arise from the heart muscle depolarizing during each heartbeat.In a conventional 12 lead ECG, ten electrodes are placed on the patient's limbs and on the surface of the chest. The overall magnitude of the heart's electrical potential is then measured from twelve different angles (""leads"") and is recorded over a period of time (usually 10 seconds). In this way, the overall magnitude and direction of the heart's electrical depolarization is captured at each moment throughout the cardiac cycle. The graph of voltage versus time produced by this noninvasive medical procedure is referred to as an electrocardiogram (abbreviated ECG or EKG).During each heartbeat, a healthy heart will have an orderly progression of depolarization that starts with pacemaker cells in the sinoatrial node, spreads out through the atrium, passes through the atrioventricular node down into the bundle of His and into the Purkinje fibers spreading down and to the left throughout the ventricles. This orderly pattern of depolarization gives rise to the characteristic ECG tracing. To the trained clinician, an ECG conveys a large amount of information about the structure of the heart and the function of its electrical conduction system. Among other things, an ECG can be used to measure the rate and rhythm of heartbeats, the size and position of the heart chambers, the presence of any damage to the heart's muscle cells or conduction system, the effects of cardiac drugs, and the function of implanted pacemakers.